CN116175799B - System and method for preparing functionalized polyolefin under inert atmosphere - Google Patents
System and method for preparing functionalized polyolefin under inert atmosphere Download PDFInfo
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- CN116175799B CN116175799B CN202310113275.5A CN202310113275A CN116175799B CN 116175799 B CN116175799 B CN 116175799B CN 202310113275 A CN202310113275 A CN 202310113275A CN 116175799 B CN116175799 B CN 116175799B
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 92
- 238000003756 stirring Methods 0.000 claims abstract description 90
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 239000011261 inert gas Substances 0.000 claims abstract description 22
- 239000002861 polymer material Substances 0.000 claims abstract description 19
- 230000015556 catabolic process Effects 0.000 claims abstract description 17
- 238000006731 degradation reaction Methods 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000003860 storage Methods 0.000 claims abstract description 11
- 238000007306 functionalization reaction Methods 0.000 claims abstract description 9
- 238000004132 cross linking Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 49
- 238000002156 mixing Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 11
- 238000007790 scraping Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000013538 functional additive Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- 230000006399 behavior Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 17
- 238000004891 communication Methods 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 229920000747 poly(lactic acid) Polymers 0.000 description 4
- 239000004626 polylactic acid Substances 0.000 description 4
- -1 but not limited to Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
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- 101000911390 Homo sapiens Coagulation factor VIII Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 239000000806 elastomer Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/26—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
Abstract
The invention discloses a system and a method for preparing functionalized polyolefin under inert atmosphere, wherein the system comprises a double-screw extruder and an inert gas storage tank arranged at one side of the double-screw extruder, a feeding hopper is arranged at the feeding end of the double-screw extruder, a rotatable stirring shaft is arranged in the feeding hopper, a plurality of stirring rods are arranged on the stirring shaft, the stirring shaft and the stirring rod are hollow, the stirring shaft is communicated with a cavity in the stirring rod, a plurality of air inlets are arranged on the stirring shaft and the stirring rod, the storage tank is communicated with the feeding hole through a pipeline, and a heating mechanism for heating materials is further arranged in the feeding hopper. The inert gas can greatly reduce the degradation behaviors of oxygen in the air on the crosslinking, degradation and the like of the high polymer material caused by high-temperature functionalization. The invention overcomes the defects of the prior art, has reasonable design and compact structure, and has higher social use value and application prospect.
Description
Technical Field
The invention relates to the technical field of polymer modification, in particular to a system and a method for preparing functionalized polyolefin under inert atmosphere.
Background
Along with the development of high and new technology and the gradual expansion of the application fields of high polymer materials, the requirements of high performance and functionalization are put forward for polyolefin materials. The polyolefin material has a relatively stable chemical structure, a simple physical structure and a crystal state at normal temperature, and the microscopic characteristics lead the polyolefin material to have good chemical stability, electrical insulation and mechanical strength; however, from the perspective of composite materials, the characteristic of non-polarity and easy crystallization of polyolefin limits the application fields of the polyolefin, such as polymer alloy, organic-inorganic blending materials, polar-non-polar multi-layer bonding materials and the like. The modification methods of polymers are widely varied and can be broadly classified into physical modification and chemical modification. The invention belongs to chemical modification, when a high polymer material is functionalized by a common double-screw extruder, oxygen in air inevitably enters an extruder system along with feeding, and the degradation behaviors of crosslinking, degradation and the like of the high polymer material are accelerated due to the participation of the oxygen, so that the mechanical property of the material is greatly reduced.
Accordingly, the inventor has the problem of providing a system and a method for preparing functionalized polyolefin under inert atmosphere, which are expected to achieve the purpose of having more practical value, by keeping the experience of the design development and the actual production in the related industry for many years and researching and improving the existing structure and the defects.
Disclosure of Invention
In order to solve the problem that the mechanical properties of the high polymer material are greatly reduced due to the fact that oxygen in the air inevitably enters an extruder system along with feeding when the high polymer material is functionalized by a common double-screw extruder, and the degradation behaviors of crosslinking, degradation and the like of the high polymer material are accelerated due to the participation of the oxygen, the invention provides a system and a method for preparing functionalized polyolefin under inert atmosphere.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a system for preparing functional polyolefin under inert atmosphere, includes the twin-screw extruder to and the inert gas holding vessel of setting in twin-screw extruder one side, the twin-screw extruder feed end is equipped with the feeder hopper, be equipped with rotatable (mixing) shaft in the feeder hopper, be equipped with a plurality of puddlers on the (mixing) shaft, (mixing) shaft and puddler inside are hollow form, and the (mixing) shaft is interconnected with the inside cavity of puddler, be equipped with a plurality of inlet ports on (mixing) shaft and the puddler, the holding vessel passes through pipeline and feed port intercommunication, still be equipped with the heating mechanism of material heating in the feeder hopper.
Preferably, the upper end of the stirring shaft is provided with a rotating limit ring in sealing connection, an annular communication cavity is formed in the limit ring, a plurality of communication holes communicated with the communication cavity are formed in the outer side of the stirring shaft, and the output end of the storage tank is provided with a connecting pipe communicated with the communication cavity in the limit ring.
Preferably, a partition plate fixedly connected is arranged in the feed hopper, the partition plate divides the feed hopper into a preheating zone and a heating zone from top to bottom, a discharging plate which can be opened and closed and is used for conveying materials in a falling mode is arranged on the partition plate, the stirring rod comprises a first rod and a second rod, the first rod is located the preheating zone, the second rod is located the heating zone, and a hollow cavity is formed in the second rod.
Preferably, the division board includes first board and second board, first board is circular, the second board is annular fixed connection in the first board outside, and the second board is the tilt up form, the (mixing) shaft rotates and passes first board center department, be equipped with fixed connection's sleeve pipe on the first board, the sleeve pipe is located the (mixing) shaft outside, is located the sleeve pipe be equipped with fixed connection's transport auger on the (mixing) shaft, sleeve pipe bottom one side is equipped with the charge-in board that can open and shut, first pole is located the sleeve pipe top, first pole bottom is equipped with a plurality of fixed connection's stirring branch poles.
Preferably, a scraping plate which is fixedly connected with the bottom of the stirring sub-rod and scrapes the material on the surface of the second plate is arranged at the bottom of the stirring sub-rod.
Preferably, a circulation hole is formed in one side wall of the bottom of the sleeve, first adjusting grooves which are communicated are formed in the upper end and the lower end of the circulation hole, the bottom of each first adjusting groove penetrates through the first plate, the feeding plate is slidably connected in the first adjusting grooves, reciprocating threads are arranged on the stirring shaft below the first plate, a fixedly connected adjusting ring plate is arranged at the bottom of the feeding plate, the stirring shaft penetrates through the adjusting ring plate, and the stirring shaft is connected with the adjusting ring plate through the reciprocating threads.
Preferably, the second plate is provided with a discharging hole, two side walls of the discharging hole are provided with second adjusting grooves which are symmetrically distributed and communicated, the discharging plate is slidably connected in the second adjusting grooves, the other two side walls of the discharging hole are provided with limit grooves which are symmetrically distributed, the limit grooves are internally provided with telescopic first telescopic pipes, and the end parts of the first telescopic pipes are fixedly connected with the side walls of the discharging plate.
Preferably, one end of the second adjusting groove is located in the first plate, symmetrically distributed guide grooves are formed in the first plate, one side of each guide groove is communicated with the corresponding guide groove, the end of each first telescopic pipe is fixedly connected with the corresponding guide groove, a second telescopic pipe which is symmetrically distributed and fixedly connected is arranged at the bottom of the first plate, the extending end of each second telescopic pipe is fixedly connected with the adjusting ring plate, and the other end of each guide pipe is communicated with the corresponding second telescopic pipe.
Preferably, the upper end of the feed hopper is provided with a driving motor fixedly connected with the stirring shaft, and a plurality of feeding pipes for feeding materials are arranged on the feed hopper.
A process for preparing a functionalized polyolefin under an inert atmosphere comprising the steps of:
s1, high polymer materials and functional additives are fed into a feed hopper through a feed pipe, and meanwhile, a driving motor is started to drive a stirring shaft to rotate;
s2, materials entering the feed hopper firstly enter a preheating zone, a heating mechanism in the preheating zone is controlled, the materials are heated firstly, meanwhile, a stirring shaft rotates, a first rod, a stirring dividing rod and a scraping plate in the preheating zone can be driven to synchronously rotate, the materials in the preheating zone are fully and uniformly mixed, meanwhile, the materials on a second plate automatically move towards the bottom of a sleeve due to the inclination of the second plate and enter the sleeve through a circulating hole, and a conveying auger is driven to convey the materials at the bottom of the sleeve to the upper end through the rotation of the stirring shaft, so that the materials in the preheating zone can be continuously and internally circulated, the materials are more uniformly mixed, and the material mixing efficiency is improved;
s3, along with the rotation of the stirring shaft, the adjusting ring plate is driven to periodically move up and down through the reciprocating threads, the feeding plate can be driven to periodically move up and down, meanwhile, the discharging plate is enabled to synchronously and periodically move through the first telescopic pipe, the guide groove and the second telescopic pipe, when the circulating hole is sealed by the feeding plate, the discharging hole is opened by the discharging plate, and when the circulating hole is opened by the feeding plate, the discharging hole is synchronously sealed by the discharging plate, so that after preheating of materials is completed, the discharging hole is opened, the materials can automatically enter a heating area, and simultaneously, the circulating hole is sealed, the materials can be effectively prevented from being accumulated in a sleeve, the materials in the sleeve are fully separated from the sleeve, the materials can better enter the heating area, the opening time and the closing time of the discharging hole are increased, the materials can completely enter the heating area, and the closing time of the discharging hole can completely and uniformly mix the materials;
s4, after the material completely enters the heating zone, the discharging hole is sealed by the discharging plate, the new material enters the preheating zone again through the feeding pipe for preheating, meanwhile, the material is heated again by the heating mechanism of the heating zone, meanwhile, inert gas in the storage tank enters the cavity in the stirring shaft through the connecting pipe, and enters the heating zone through the air inlet hole, so that the inert gas can be wrapped on the surface of the material; meanwhile, the second rod can sufficiently stir the materials in the heating area;
and S5, after heating is finished, a discharge valve at the bottom of the feed hopper is opened, so that the mixed materials enter the double-screw extruder to be functionalized, and the degradation behavior of oxygen in the air on crosslinking and degradation of the high-molecular polymer material caused by high-temperature functionalization is greatly reduced.
Compared with the prior art, the invention has the beneficial effects that:
an inert gas device is additionally arranged on the basis of a common double-screw extruder, and under the inert gas atmosphere, the inert gas wraps the high polymer material and the functional auxiliary agent thereof and enters an extruder system for functionalization, so that the degradation behaviors of oxygen, moisture and the like in the air on the crosslinking, degradation and the like of the high polymer material (such as polylactic acid PLA, PP and the like) caused by high-temperature functionalization are greatly reduced, and particularly, the high-temperature functional high-polymer material is easy to degrade and has great advantages on the downstream.
Inert gas (such as argon, nitrogen and the like) is continuously introduced into the equipment, so that the concentration of oxygen is diluted, the oxygen is prevented from being introduced into the cylinder of the extruder at the feed inlet, the degradation of the components such as an antioxidant, a main material and the like is reduced, and the material is processed in the inert gas atmosphere.
Set up (mixing) shaft and puddler in the feeder hopper, can utilize the rotation of puddler, make the misce bene that the material can be quick, set up (mixing) shaft and puddler into hollow form simultaneously to make bin and inlet port intercommunication, make the puddler in the stirring, inert gas can more even distribution in the feeder hopper, make inert gas wrap up the material more even.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic cross-sectional view of a feed hopper according to the present invention.
Fig. 3 is an enlarged view of fig. 2 a in accordance with the present invention.
Fig. 4 is a schematic diagram of a connection structure between a discharge plate and a first telescopic tube according to the present invention.
Fig. 5 is a schematic diagram of a cross-sectional structure of a diversion trench and a second adjustment trench of the present invention.
Fig. 6 is a schematic perspective view of the stirring shaft, the sleeve and the partition plate according to the present invention.
FIG. 7 is a schematic cross-sectional view of a stop collar and stirring shaft according to the present invention.
In the figure: 1. a twin screw extruder; 11. a feed motor; 2. a feed hopper; 21. a driving motor; 22. a feed pipe; 23. a first lever; 231. stirring and separating the rods; 232. a scraper; 24. a stirring shaft; 241. a second lever; 242. an air inlet hole; 243. a limiting ring; 244. a reciprocating thread; 245. an adjusting ring plate; 246. a second telescopic tube; 247. conveying the auger; 248. a connecting pipe; 249. a communication hole; 25. a sleeve; 251. a first adjustment tank; 252. a circulation hole; 253. a feed plate; 26. a partition plate; 260. a first plate; 261. a second plate; 262. a limit groove; 263. a first telescopic tube; 264. a discharge plate; 265. a discharge hole; 266. an adjustment aperture; 267. a diversion trench; 268. and a second regulating groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-2, a system for preparing functionalized polyolefin under inert atmosphere comprises a double-screw extruder 1 and an inert gas storage tank arranged on one side of the double-screw extruder 1, wherein a feed hopper 2 is arranged at the feed end of the double-screw extruder 1, a rotatable stirring shaft 24 is arranged in the feed hopper 2, a plurality of stirring rods are arranged on the stirring shaft 24, the stirring shaft 24 and the stirring rods are hollow, the stirring shaft 24 and the internal cavity of the stirring rods are mutually communicated, a plurality of air inlets 242 are formed in the stirring shaft 24 and the stirring rods, the storage tank is communicated with the feed inlet through a pipeline, and a heating mechanism for heating materials is further arranged in the feed hopper 2.
An inert gas device is additionally arranged on the basis of a common double-screw extruder 1, and under the inert gas atmosphere, the inert gas wraps the high polymer material and the functional auxiliary agent thereof and enters an extruder system together for functionalization, so that the degradation behaviors of crosslinking, degradation and the like of the high polymer material caused by high-temperature functionalization by oxygen in the air are greatly reduced.
The inert atmosphere is provided by nitrogen, the nitrogen is a simple substance formed by nitrogen elements, the chemical formula is N2, the inert atmosphere is colorless and odorless, the inert atmosphere can react with hydrogen to generate ammonia only under the conditions of high temperature and high pressure and a catalyst, and nitrogen monoxide can be generated by combining with oxygen under the condition of discharging; even the active metals such as Ca, mg, sr and Ba can react with them only under heating. This high chemical stability of nitrogen is related to its molecular structure, 2N atoms are combined into a nitrogen molecule with triple bonds, comprising 1 sigma bond and 2 pi bonds, because pi bonds are first attacked in chemical reactions, while pi bonds in N2 molecules have a lower energy level than sigma bonds, and are difficult to open, thus making N2 difficult to participate in chemical reactions. Nitrogen occupies 4/5 of the atmosphere, i.e. more than 78% of the atmosphere, and an almost unlimited amount of nitrogen can be used. The industry often uses methods of fractionating liquid air to obtain large amounts of nitrogen, which is inexpensive and readily available.
Functionalizing high molecular polymer materials including, but not limited to, polyethylene (LDPE, LLDPE, mLLDPE, HDPE, etc.), polypropylene (PPH, PPB, PPR, etc.), polylactic acid PLA, elastomers, rubber, etc. with an extruder under an inert atmosphere; the functional monomers include, but are not limited to, maleic Anhydride (MAH), acrylic Acid (AA), methyl Methacrylate (MMA), glycidyl Methacrylate (GMA), polyvinyl alcohol (PVA), N-vinylpyrrolidone, itaconic acid (ITA), acrylamide derivatives, beta-hydroxyethyl methacrylate (HEMA), etc
In this embodiment, referring to fig. 7, a rotatable and sealing connection limiting ring 243 is disposed at the upper end of the stirring shaft 24, an annular communication cavity is disposed inside the limiting ring 243, a plurality of communication holes 249 connected with the communication cavity are disposed outside the stirring shaft 24, and a connection pipe 248 connected with the communication cavity inside the limiting ring 243 is disposed at the output end of the storage tank.
The design of the limiting ring 243, the communicating cavity, the communicating hole 249 and the connecting pipe 248 realizes that inert gas can be conveyed into the air inlet 242, and meanwhile, the rotation of the original stirring shaft 24 is not affected.
In this embodiment, referring to fig. 2 and 6, a partition plate 26 is fixedly connected in the feed hopper 2, the partition plate 26 divides the feed hopper 2 into a preheating zone and a heating zone from top to bottom, a discharging plate 264 capable of opening and closing and used for dropping and conveying materials is arranged on the partition plate 26, the stirring rod comprises a first rod 23 and a second rod 241, the first rod 23 is located in the preheating zone, the second rod 241 is located in the heating zone, and a hollow cavity is formed inside the second rod 241. Wherein, all be equipped with heating mechanism in preheating zone and the zone of heating, heating mechanism can adopt the heating resistance wire, and the feeder hopper outside parcel has insulation material simultaneously.
The design of preheating zone and zone of heating can be through the mode of batch heating, makes the material mix evenly earlier, then the reheat, before making the material heat completely, the misce bene that can be better.
In this embodiment, referring to fig. 2-3, the partition plate 26 includes a first plate 260 and a second plate 261, the first plate 260 is circular, the second plate 261 is annular and fixedly connected to the outer side of the first plate 260, the second plate 261 is inclined upwards, the stirring shaft 24 rotates through the center of the first plate 260, a fixedly connected sleeve 25 is disposed on the first plate 260, the sleeve 25 is located on the outer side of the stirring shaft 24, a fixedly connected conveying auger 247 is disposed on the stirring shaft 24 and located in the sleeve 25, an openable feeding plate 253 is disposed on one side of the bottom of the sleeve 25, the first rod 23 is located above the sleeve 25, and a plurality of fixedly connected stirring sub-rods 231 are disposed at the bottom of the first rod 23. Wherein the middle part of the first plate 260 is provided with an adjusting hole 266, and the stirring shaft 24 is rotationally and hermetically connected with the adjusting hole 266.
The design of sleeve pipe 25, carry auger 247 and charge-in board 253 makes the material of preheating zone bottom open through charge-in board 253, gets into in the sleeve pipe 25, carries to the upper end through carrying auger 247, makes the material motion top of bottom to realized the material and carried out the inner loop in the preheating zone, made the misce bene that the material can be better.
In this embodiment, referring to fig. 2, a scraper 232 is fixedly connected to the bottom of the stirring rod 231 and scrapes the material on the surface of the second plate 261. The scraper 232 is designed to better allow material to enter the sleeve 25 and to move through the discharge opening 265 into the heating zone.
In this embodiment, referring to fig. 2, a circulation hole 252 is provided on a side wall of the bottom of the sleeve 25, a first adjusting slot 251 is provided at the upper and lower ends of the circulation hole 252, the bottom of the first adjusting slot 251 passes through the first plate 260, a feeding plate 253 is slidably connected in the first adjusting slot 251, a reciprocating screw 244 is provided on the stirring shaft 24 below the first plate 260, a fixed adjusting ring plate 245 is provided at the bottom of the feeding plate 253, the stirring shaft 24 passes through the adjusting ring plate 245, and the stirring shaft 24 is connected with the adjusting ring plate 245 through the reciprocating screw 244.
The reciprocating screw 244 and the adjusting ring plate 245 can utilize the continuous rotation of the stirring shaft 24 to drive the feeding plate 253 to periodically move up and down, so that intermittent opening and closing of the circulating holes 252 are realized.
In this embodiment, referring to fig. 3 to 5, the second plate 261 is provided with a discharge hole 265, two side walls of the discharge hole 265 are provided with second adjusting grooves 268 which are symmetrically distributed and communicated, the discharge plate 264 is slidably connected in the second adjusting grooves 268, the other two side walls of the discharge hole 265 are provided with limit grooves 262 which are symmetrically distributed, the limit grooves 262 are internally provided with telescopic first telescopic tubes 263, and the end parts of the first telescopic tubes 263 are fixedly connected with the side walls of the discharge plate 264; one end of the second adjusting groove 268 is located in the first plate 260, symmetrically distributed guide grooves 267 are formed in the first plate 260, one side of each guide groove 267 is communicated with the corresponding guide groove 267, the end of each first telescopic tube 263 is fixedly connected with the corresponding guide groove 267, a second telescopic tube 246 which is symmetrically distributed and fixedly connected is arranged at the bottom of the first plate 260, the extending end of each second telescopic tube 246 is fixedly connected with the adjusting ring plate 245, and the other end of each guide tube is communicated with the corresponding second telescopic tube 246.
The diversion trench 267, the first telescopic tube 263 and the second telescopic tube 246 are all internally stored with liquid, and transmission is realized by utilizing hydraulic pressure. The adjusting ring plate 245 is enabled to periodically move up and down, and the discharging plate 264 is driven to periodically reciprocate in the discharging hole 265 through hydraulic transmission, so that the opening and closing of the discharging hole 265 are realized.
In this embodiment, the upper end of the feed hopper 2 is provided with a driving motor 21 fixedly connected, the output end of the driving motor 21 is fixedly connected with a stirring shaft 24, and the feed hopper 2 is provided with a plurality of feeding pipes 22 for feeding materials. Wherein, the bottom of the feed hopper 2 is provided with a feed motor 11 for conveying materials to the double-screw extruder 1.
A process for preparing a functionalized polyolefin under an inert atmosphere comprising the steps of:
s1, high polymer materials and functional additives are fed into a feed hopper 2 through a feed pipe 22, and meanwhile, a driving motor 21 is started to drive a stirring shaft 24 to rotate;
s2, materials entering the feed hopper 2 enter a preheating zone firstly, a heating mechanism in the preheating zone is controlled, the materials are heated firstly, meanwhile, the stirring shaft 24 rotates, the first rod 23, the stirring dividing rod 231 and the scraping plate 232 in the preheating zone can be driven to synchronously rotate, the materials in the preheating zone are fully and uniformly mixed, meanwhile, the materials on the second plate 261 automatically move towards the bottom of the sleeve 25 due to the inclination of the second plate 261 and enter the sleeve 25 through the circulation hole 252, and the conveying auger 247 is driven to convey the materials at the bottom of the sleeve 25 to the upper end through the rotation of the stirring shaft 24, so that the materials in the preheating zone can be continuously and internally circulated, the materials are more uniformly mixed, and the material mixing efficiency is improved;
s3, along with the rotation of the stirring shaft 24, the reciprocating screw 244 drives the adjusting ring plate 245 to periodically move up and down, the feeding plate 253 can be driven to periodically move up and down, meanwhile, the discharging plate 264 is enabled to periodically move synchronously through the first telescopic pipe 263, the guide groove 267 and the second telescopic pipe 246, when the feeding plate 253 seals the circulating hole 252, the discharging plate 264 enables the discharging hole 265 to be opened, and when the feeding plate 253 enables the circulating hole 252 to be opened, the discharging plate 264 synchronously seals the discharging hole 265, so that after preheating of materials is completed, the discharging hole 265 is opened, the materials can automatically enter a heating zone, meanwhile, the circulating hole 252 is sealed, the materials in the sleeve 25 can be effectively prevented from being accumulated in the sleeve 25, the materials in the sleeve 25 are fully separated from the sleeve 25, the materials can well enter the heating zone, the opening time and the closing time of the circulating hole 252 are increased, the opening time and the closing time of the discharging hole 265 can be completely entered, and the materials can be thoroughly and evenly mixed by the closing time of the discharging hole 265;
s4, after the material completely enters the heating zone, the discharging plate 264 seals the discharging hole 265, new material enters the preheating zone again through the feeding pipe 22 for preheating, meanwhile, the heating mechanism of the heating zone heats the material again, meanwhile, inert gas in the storage tank enters the cavity in the stirring shaft 24 through the connecting pipe 248, and enters the heating zone through the air inlet 242, so that the inert gas can be wrapped on the surface of the material; meanwhile, the second rod 241 can sufficiently stir the materials in the heating area;
and S5, after heating is finished, a discharge valve at the bottom of the feed hopper 2 is opened, so that the mixed materials enter the double-screw extruder 1 to be functionalized, and the degradation behavior of oxygen in the air on crosslinking and degradation of the high-molecular polymer material caused by high-temperature functionalization is greatly reduced.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The control mode of the invention is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming of a person skilled in the art, the supply of power also belongs to common knowledge in the art, and the invention is mainly used for protecting a mechanical device, so the invention does not explain the control mode and circuit connection in detail.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. A system for preparing a functionalized polyolefin in an inert atmosphere, characterized by: the device comprises a double-screw extruder (1) and an inert gas storage tank arranged on one side of the double-screw extruder (1), wherein a feed hopper (2) is arranged at the feed end of the double-screw extruder (1), a rotatable stirring shaft (24) is arranged in the feed hopper (2), a plurality of stirring rods are arranged on the stirring shaft (24), the stirring shaft (24) and the stirring rod are hollow, the stirring shaft (24) is communicated with a cavity in the stirring rod, a plurality of air inlets (242) are formed in the stirring shaft (24) and the stirring rod, the storage tank is communicated with the feed inlet through a pipeline, and a heating mechanism for heating materials is further arranged in the feed hopper (2);
the utility model discloses a stirring device for a material feeding device, which comprises a feeding hopper (2), wherein a partition plate (26) is fixedly connected in the feeding hopper (2), the partition plate (26) comprises a first plate (260) and a second plate (261), the first plate (260) is round, the second plate (261) is fixedly connected to the outer side of the first plate (260) in a ring shape, the second plate (261) is inclined upwards, a stirring shaft (24) rotates to penetrate through the center of the first plate (260), a sleeve (25) is fixedly connected to the first plate (260), the sleeve (25) is positioned on the outer side of the stirring shaft (24), a conveying auger (247) is fixedly connected to the stirring shaft (24) and positioned in the sleeve (25), a feeding plate (253) capable of opening and closing is arranged on one side of the bottom of the sleeve (25), a first rod (23) is positioned above the sleeve (25), and a plurality of stirring sub-rods (231) are fixedly connected to the bottom of the first rod (23).
A circulation hole (252) is formed in one side wall of the bottom of the sleeve (25), first adjusting grooves (251) which are communicated are formed in the upper end and the lower end of each circulation hole (252), the bottom of each first adjusting groove (251) penetrates through a first plate (260), a feeding plate (253) is slidably connected in each first adjusting groove (251), reciprocating threads (244) are formed in a stirring shaft (24) which is located below the first plates (260), a fixedly connected adjusting ring plate (245) is arranged at the bottom of each feeding plate (253), the stirring shaft (24) penetrates through the corresponding adjusting ring plate (245), and the stirring shafts (24) are connected with the corresponding adjusting ring plates (245) through the corresponding reciprocating threads (244);
the discharging device is characterized in that a discharging hole (265) is formed in the second plate (261), second adjusting grooves (268) which are symmetrically distributed and communicated are formed in two side walls of the discharging hole (265), the discharging plate (264) is slidably connected in the second adjusting grooves (268), limit grooves (262) which are symmetrically distributed are formed in the other two side walls of the discharging hole (265), a telescopic first telescopic pipe (263) is arranged in the limit grooves (262), and the end part of the first telescopic pipe (263) is fixedly connected with the side wall of the discharging plate (264);
one end of second adjustment tank (268) is located first board (260), be equipped with guiding gutter (267) of symmetric distribution in first board (260), guiding gutter (267) one side and second adjustment tank (268) intercommunication, first flexible pipe (263) tip and corresponding guiding gutter (267) fixed connection, first board (260) bottom is equipped with symmetric distribution and fixed connection's flexible pipe of second (246), flexible pipe of second (246) extension end and regulation annular plate (245) fixed connection, the honeycomb duct other end and flexible pipe of second (246) intercommunication.
2. The system for preparing a functionalized polyolefin under an inert atmosphere according to claim 1, wherein: the stirring shaft (24) upper end is equipped with rotation and sealing connection's spacing ring (243), spacing ring (243) inside is equipped with and is annular intercommunication chamber, stirring shaft (24) outside is equipped with a plurality of intercommunications hole (249) that are linked together with the intercommunication chamber, the holding vessel output is equipped with connecting pipe (248) that are linked together with spacing ring (243) inside intercommunication chamber.
3. A system for preparing functionalized polyolefin under an inert atmosphere according to claim 2, characterized in that: the utility model discloses a feed hopper, including division board (26), stirring rod, feed hopper (2), division board (26) divide into preheating zone and zone of heating from top to bottom, be equipped with on division board (26) and can open and shut and be used for the discharge plate (264) that the material dropped and carried, the puddler includes first pole (23) and second pole (241), first pole (23) are located the preheating zone, second pole (241) are located the zone of heating, the inside hollow cavity that is of second pole (241).
4. A system for preparing functionalized polyolefin under an inert atmosphere according to claim 3, wherein: the bottom of the stirring branch rod (231) is provided with a scraping plate (232) which is fixedly connected and scrapes the material on the surface of the second plate (261).
5. The system for preparing a functionalized polyolefin under an inert atmosphere according to claim 4, wherein: the feeding hopper (2) upper end is equipped with fixed connection's driving motor (21), driving motor (21) output and (24) fixed connection, be equipped with a plurality of inlet pipes (22) that are used for the material to get into on feeding hopper (2).
6. A process for preparing functionalized polyolefins under an inert atmosphere, using a system according to any one of claims 1 to 5, characterized in that it comprises the following steps:
s1, high polymer materials and functional additives are fed into a feed hopper (2) through a feed pipe (22), and a driving motor (21) is started to drive a stirring shaft (24) to rotate;
s2, materials entering the feed hopper (2) enter a preheating zone firstly, a heating mechanism in the preheating zone is controlled, the materials are heated firstly, meanwhile, a stirring shaft (24) rotates, a first rod (23), a stirring separation rod (231) and a scraping plate (232) of the preheating zone can be driven to synchronously rotate, the materials in the preheating zone are fully and uniformly mixed, meanwhile, the materials on a second plate (261) automatically move towards the bottom of a sleeve (25) due to the inclination of the second plate (261), enter the sleeve (25) through a circulating hole (252), and the materials at the bottom of the sleeve (25) are conveyed to the upper end by driving a conveying auger (247) through the rotation of the stirring shaft (24), so that the materials in the preheating zone can be continuously and internally circulated, the materials are more uniformly mixed, and the material mixing efficiency is improved;
s3, along with the rotation of a stirring shaft (24), the adjusting ring plate (245) is driven to periodically move up and down through the reciprocating screw thread (244), the feeding plate (253) can be driven to periodically move up and down, meanwhile, the discharging plate (264) is enabled to periodically move synchronously through the first telescopic pipe (263), the guide groove (267) and the second telescopic pipe (246), when the feeding plate (253) seals the circulating hole (252), the discharging plate (264) opens the discharging hole (265), when the feeding plate (253) opens the circulating hole (252), the discharging plate (264) synchronously seals the discharging hole (265), after preheating of materials is completed, the discharging hole (265) can be opened, the materials can automatically enter a heating zone, meanwhile, the circulating hole (252) is sealed, the materials in the sleeve (25) can be effectively prevented from being accumulated in the sleeve (25), the materials in the sleeve (25) are enabled to be fully separated from the sleeve (25), the materials can enter the heating zone well, the heating zone through the width of the first adjusting groove (251) and the second adjusting groove (268), the discharging hole (265) is enabled to be opened, the discharging time of the heating zone (265) can be completely opened, and the discharging hole (265) can be completely closed, and the discharging time can be completely opened;
s4, after the material completely enters the heating zone, a discharging hole (265) is sealed by a discharging plate (264), new material enters the preheating zone again through a feeding pipe (22) for preheating, meanwhile, the material is heated again by a heating mechanism of the heating zone, meanwhile, inert gas in a storage tank enters a cavity in a stirring shaft (24) through a connecting pipe (248), and enters the heating zone through an air inlet (242), so that the inert gas can be wrapped on the surface of the material; simultaneously, the second rod (241) can sufficiently stir the materials in the heating area;
and S5, after heating is finished, a discharge valve at the bottom of the feed hopper (2) is opened, so that the mixed materials enter the double-screw extruder (1) to be functionalized, and the degradation behavior of oxygen in the air on crosslinking and degradation of the high-molecular polymer material caused by high-temperature functionalization is greatly reduced.
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| CN116175799A (en) | 2023-05-30 |
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