CN113652087A - Low-temperature-resistant plastic part and preparation method thereof - Google Patents
Low-temperature-resistant plastic part and preparation method thereof Download PDFInfo
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- CN113652087A CN113652087A CN202110884133.XA CN202110884133A CN113652087A CN 113652087 A CN113652087 A CN 113652087A CN 202110884133 A CN202110884133 A CN 202110884133A CN 113652087 A CN113652087 A CN 113652087A
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- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
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Abstract
The invention relates to the technical field of plastics, in particular to a low-temperature-resistant plastic part and a preparation method thereof, wherein the low-temperature-resistant plastic part comprises the following components: polyimide, polysulfone resin, epoxy resin, glass fiber, antimony trioxide, gamma-amidino thiopropyl trihydroxysilane, zinc stearate and a multi-carbon nano tube, wherein the mass parts of the components are as follows: 10-20 parts of polyimide, 35-65 parts of polysulfone resin, 25-35 parts of epoxy resin, 2-5 parts of glass fiber, 1-3 parts of antimony trioxide, 1-2 parts of gamma-amidino thiopropyl trihydroxysilane, 0.5-2 parts of zinc stearate and 0.5-0.6 part of a multi-carbon nano tube.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a low-temperature-resistant plastic part and a preparation method thereof.
Background
In the prior art, the use environment of the plastic has higher requirements, the plastic is easy to soften when the plastic is operated at high temperature, the due strength and toughness are influenced, and the toughness of the plastic is instantaneously reduced when the plastic is operated at low temperature, so that the normal use performance of the plastic is seriously influenced. In particular, at relatively low temperatures, plastics are susceptible to cracking and the like.
There are the following problems:
1. when the plastic is operated at a low temperature of (-70 ℃), the toughness of the plastic is reduced, and cracks are generated;
2. when the plastic is operated at a low temperature (-150 ℃), the toughness of the plastic is reduced, and the plastic can crack.
Disclosure of Invention
The invention aims to solve the technical defects and provide a method for preparing a low-temperature-resistant plastic part which can not influence the performance of the plastic at low temperature.
In order to achieve the purpose, the invention designs a low-temperature resistant plastic part which comprises the following components: polyimide, polysulfone resin, epoxy resin, glass fiber, antimony trioxide, gamma-amidino thiopropyl trihydroxysilane, zinc stearate and a multi-carbon nano tube, wherein the mass parts of the components are as follows: 10-20 parts of polyimide, 35-65 parts of polysulfone resin, 25-35 parts of epoxy resin, 2-5 parts of glass fiber, 1-3 parts of antimony trioxide, 1-2 parts of gamma-amidino thiopropyl trihydroxysilane, 0.5-2 parts of zinc stearate and 0.5-0.6 part of a multi-carbon nano tube.
Preferably, the mass portion of the polyimide is 12-16.
Preferably, the multi-carbon nanotube is a Cu/carbon nanotube.
A method for preparing a plastic piece of a mesh screen for a dust collector comprises the following steps:
step 1, 10-20 parts of polyimide, 35-65 parts of polysulfone resin, 25-35 parts of epoxy resin, 2-5 parts of glass fiber, 1-3 parts of antimony trioxide, 1-2 parts of gamma-amidinothiopropyl trihydroxysilane, 0.5-2 parts of zinc stearate and 0.5-0.6 part of a multi-carbon nano tube are put into a stirrer to be stirred for 30-60 minutes;
step 2, filtering the stirred liquid through a filter screen to obtain filtrate;
step 3, putting the filtered filtrate ingredients into a mixer;
step 4, filling inert gas into the mixer to make the liquid generate bubbles, and then stirring the liquid by a stirrer to make the liquid mixed more uniformly;
step 5, conveying the uniformly mixed and stirred ingredients to an extruder through a conveying pipe, wherein the temperatures of a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone of the extruder are respectively 55-70 ℃, 65-80 ℃, 75-90 ℃, 85-95 ℃, 85-100 ℃ and 95-110 ℃, the ingredients are extruded into particles through the extruder, and the particles extruded through the extruder are hollow inside or are integrally hollowed out;
step 6, grinding the extruded particles for 0.2min through a grinder by a plastic sucking machine;
step 7, sucking the ground powder by a plastic sucking machine, heating to 150-;
and 8, injecting the melted plastic water into a mold with a corresponding shape through an injection molding machine, keeping the temperature at 150 ℃ and the pressure at 2-5MPa for 0.3-0.5min, then quickly cooling to the normal temperature, and taking out the plastic water from the mold.
Preferably, the inert gas in step 4 is nitrogen.
Preferably, the melting in the step 5 is carried out to ensure that the granule time is 0.1-0.3 min.
According to the preparation method of the low-temperature-resistant plastic part, the reasonable formula design is adopted, so that the temperature and toughness of the plastic at low temperature can be effectively improved, the normal use of the plastic part at low temperature is ensured, the performance and the service life are not influenced, and the reliability is improved.
1. The plastic part is prepared, and the raw materials are stirred and injected with inert gas to exhaust air, so that the stability of the plastic part is improved, and the stability of the plastic is improved;
2. the particles extruded by the extruder are hollow or integrally hollowed, the particles are ground by the grinding machine, the plastic sucking machine sucks plastic to melt, and the plastic water quality is provided, so that the plastic made by the mold has high quality.
Detailed Description
The invention is further described below by way of examples.
Example 1:
this embodiment describes a low temperature resistant plastic part characterized by: comprises the following components in percentage by weight,
polyimide, polysulfone resin, epoxy resin, glass fiber, antimony trioxide, gamma-amidino thiopropyl trihydroxysilane, zinc stearate and a multi-carbon nano tube, wherein the mass parts of the components are as follows: 10 parts of polyimide, 35 parts of polysulfone resin, 25 parts of epoxy resin, 2 parts of glass fiber, 1 part of antimony trioxide, 1 part of gamma-amidinothiopropyl trihydroxysilane, 0.5 part of zinc stearate and 0.5 part of a multi-carbon nano tube;
putting the mixture into a stirrer to be stirred for 30 minutes;
step 2, filtering the stirred liquid through a filter screen to obtain filtrate;
step 3, putting the filtered filtrate ingredients into a mixer;
step 4, filling inert gas, generally nitrogen, into the mixer to make the liquid generate bubbles, and then stirring the liquid by a stirrer to make the liquid mixed more uniformly;
step 5, conveying the uniformly mixed and stirred ingredients to an extruder through a conveying pipe, wherein the temperatures of a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone of the extruder are respectively 55 ℃, 65 ℃, 75 ℃, 85 ℃ and 95 ℃, the ingredients are extruded into particles through the extruder, and the particles extruded through the extruder are hollow inside or are integrally hollowed out;
step 6, grinding the extruded particles for 0.2min through a grinder by a plastic sucking machine;
step 7, sucking the ground powder by a plastic sucking machine, heating to 150 ℃ for melting, wherein the melting time is 0.1min, and melting the particles uniformly;
and 8, injecting the melted plastic water into a mold with a corresponding shape through an injection molding machine, keeping the temperature at 150 ℃ and the pressure at 2MPa for 0.3min, then quickly cooling to the normal temperature, and taking out the plastic water from the mold.
Example 2:
a method for preparing a mesh screen plastic part for a dust collector is characterized by comprising the following steps: the method comprises the following steps:
step 1, 20 parts of polyimide, 65 parts of polysulfone resin, 35 parts of epoxy resin, 5 parts of glass fiber, 3 parts of antimony trioxide, 2 parts of gamma-amidinothiopropyl trihydroxysilane, 2 parts of zinc stearate and 0.6 part of a multi-carbon nano tube are put into a stirrer to be stirred for 60 minutes;
step 2, filtering the stirred liquid through a filter screen to obtain filtrate;
step 3, putting the filtered filtrate ingredients into a mixer;
step 4, filling inert gas, generally nitrogen, into the mixer to make the liquid generate bubbles, and then stirring the liquid by a stirrer to make the liquid mixed more uniformly;
step 5, conveying the uniformly mixed and stirred ingredients to an extruder through a conveying pipe, wherein the temperatures of a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone of the extruder are respectively 70 ℃, 80 ℃, 90 ℃, 95 ℃, 100 ℃ and 110 ℃, extruding the ingredients into particles through the extruder, and the particles extruded through the extruder are hollow inside or hollow out integrally;
step 6, grinding the extruded particles for 0.2min through a grinder by a plastic sucking machine;
step 7, sucking the ground powder by a plastic uptake machine, heating to 180 ℃ for melting, wherein the melting time is 0.3min, and melting the particles uniformly;
and 8, injecting the melted plastic water into a mold with a corresponding shape through an injection molding machine, keeping the temperature at 170 ℃ and the pressure at 5MPa for 0.5min, then quickly cooling to the normal temperature, and taking out the plastic water from the mold.
Example 3:
a method for preparing a mesh screen plastic part for a dust collector is characterized by comprising the following steps: the method comprises the following steps:
step 1, 15 parts of polyimide, 45 parts of polysulfone resin, 30 parts of epoxy resin, 3 parts of glass fiber, 2 parts of antimony trioxide, 2 parts of gamma-amidinothiopropyl trihydroxysilane, 1.5 parts of zinc stearate and 0.5 part of a multi-carbon nano tube are put into a stirrer to be stirred for 50 minutes;
step 2, filtering the stirred liquid through a filter screen to obtain filtrate;
step 3, putting the filtered filtrate ingredients into a mixer;
step 4, filling inert gas, generally nitrogen, into the mixer to make the liquid generate bubbles, and then stirring the liquid by a stirrer to make the liquid mixed more uniformly;
step 5, conveying the uniformly mixed and stirred ingredients to an extruder through a conveying pipe, wherein the temperatures of a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone of the extruder are respectively 60 ℃, 70 ℃, 85 ℃, 90 ℃, 95 ℃ and 105 ℃, extruding the ingredients into particles through the extruder, and the particles extruded through the extruder are hollow inside or hollow out integrally;
step 6, grinding the extruded particles for 0.2min through a grinder by a plastic sucking machine;
step 7, sucking the ground powder by a plastic uptake machine, heating to 170 ℃ for melting, wherein the melting time is 0.2min, and melting the particles uniformly;
and 8, injecting the melted plastic water into a mold with a corresponding shape through an injection molding machine, keeping the temperature at 160 ℃ and the pressure at 3MPa for 0.4min, then quickly cooling to the normal temperature, and taking out the plastic water from the mold.
Test
Selecting 9 plastic piece products for performance test,
the hardness of the plastic parts of 3 practical columns 1 is 66 Shore A degrees, the tensile strength is 14.8MPa, and the elongation is 610.1%;
the hardness of the 3 plastic pieces of embodiment 2 is 64 Shore A degrees, the tensile strength is 12.5MPa, and the elongation is 556.4%;
the hardness of the plastic part of 3 embodiment 3 is 62 Shore A degrees, the tensile strength is 10.6MPa, and the elongation is 553.1%;
when passing the low temperature brittleness (-35 ℃);
no crack exists;
when passing the low temperature brittleness (-70 ℃);
no cracking;
comparison of other formulas;
when passing the low temperature brittleness (-35 ℃);
cracking;
when passing the low temperature brittleness (-70 ℃);
breaking;
test
Explanation of the components:
polyimide (I): polyimide (sometimes abbreviated as PI) refers to a polymer having an imide ring (-CO-N-CO-) in its main chain, and is one of organic polymer materials having the best overall performance. The polyimide has high temperature resistance of more than 400 ℃, long-term use temperature range of-200-300 ℃, no obvious melting point at part, high insulating property, dielectric constant of 4.0 at 103 Hz and dielectric loss of only 0.004-0.007, belongs to F-H insulation, and can be divided into aliphatic polyimide, semi-aromatic polyimide and aromatic polyimide according to the chemical structure of a repeating unit. According to the interaction force between chains, the material can be divided into a cross-linking type and a non-cross-linking type, and polyimide is used as a special engineering material and is widely applied to the fields of aviation, aerospace, microelectronics, nano, liquid crystal, separation membranes, laser and the like. In the last 60 th century, the research, development and utilization of polyimide was listed as one of the most promising engineering plastics in 21 st century in all countries. Polyimide, because of its outstanding characteristics in performance and synthesis, whether as a structural material or as a functional material, has great application prospects that have been fully recognized, is known as "problem-solving solution" (distributor), and is considered "without polyimide there is no microelectronic technology today;
polysulfone-based resin: is soluble in methylene chloride; dichloroethylene and aromatic hydrocarbon, the relative density is 1.24, the water absorption (24h) is 0.22 percent, the molding shrinkage is 0.7 percent, the melting temperature is 190 ℃, the glass transition temperature is 150 ℃, the thermal deformation temperature (1.82MPa) is 174 ℃, the continuous use temperature is-100 ℃ to +150 ℃, and the tensile strength is 71.54 MPa. The bending strength is 105.8MPa, the compression strength is 95.1MPa, the tensile modulus is 2.5GPa, the notch impact strength is 6.9-7.8kJ/m2, and the volume resistivity is 10e15 omega/cm. The polysulfone material has good rigidity and toughness and is temperature resistant; heat oxidation resistance, excellent creep resistance and inorganic acid resistance; a base; the salt solution is corroded, resistant to ion radiation, non-toxic, good in insulativity and self-extinguishing property and easy to mold and process;
polysulfone resin is an organic, linear polymer of formula (C27H22O4S) n, slightly amber in color. Besides strongly polar solvents, concentrated nitric acid and sulfuric acid, are stable to common acids, bases, salts, alcohols, aliphatic hydrocarbons, etc. Soluble in methylene chloride, ethylene dichloride and aromatic hydrocarbons;
epoxy resin: in addition to poor adhesion to nonpolar plastics such as polyolefins, for various metallic materials such as aluminum, iron, copper; non-metallic materials such as glass, wood, concrete, etc.; and thermosetting plastics such as phenolic aldehyde, amino, unsaturated polyester and the like have excellent bonding performance, so that the epoxy adhesive is called a universal adhesive, and is an important variety of structural adhesives. The epoxy resin is a high molecular polymer, has a molecular formula of (C11H12O3) n, and is a general name of a polymer containing more than two epoxy groups in a molecule. It is a polycondensation product of epichlorohydrin and bisphenol A or a polyol. Because of the chemical activity of the epoxy group, the epoxy group can be opened by a plurality of compounds containing active hydrogen, and the epoxy group is cured and crosslinked to form a network structure, so that the epoxy group is a thermosetting resin. The bisphenol A epoxy resin has the largest yield and the most complete variety, and new modified varieties are continuously increased, so that the quality is continuously improved;
glass fiber: glass fiber is usually used as a reinforcing material, an electrical insulating material and a heat insulation material in a composite material, and glass fiber (Fibreglass) is an inorganic non-metallic material with excellent performance, has various varieties, has the advantages of good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but has the defects of brittle performance and poor wear resistance;
antimony trioxide:
the first application is as follows: used as white pigment, white glass, enamel, medicine, bonding cement, filler, mordant, fireproof paint, etc.;
the second purpose is as follows: the flame retardant is widely used in the industries of plastics, rubber, textile, chemical fiber, pigment, paint, electronics and the like, and also used as a catalyst and a production raw material in the chemical industry;
the application is three: used as high-purity reagent, mordant and light-proofing agent, and also used for preparing pigment and antimony potassium tartrate;
the application is four: it is used as flame retardant for various resins, synthetic rubbers, canvas, paper, paints, etc., and catalyst for petrochemical industry and synthetic fibers. Used for manufacturing mordants and opalescent agents and is a raw material for synthesizing antimony salt. The enamel industry is used as an additive to increase the opacity and surface gloss of enamels. The glass industry is used as a decolorant in place of arsenous acid. Medicine, metallurgy, military industry, etc.;
the application is five: the excellent inorganic white pigment is mainly used for coloring paint. Flame retardant for various resins, synthetic rubbers, canvas, paper, paints, etc., and catalyst for petrochemical industry and synthetic fibers. Used for manufacturing mordants and opalescent agents and is a raw material for synthesizing antimony salt. The enamel industry is used to increase the opacity and surface gloss of enamels. The glass industry is used as a decolorant to replace arsenous acid;
the application is six: antimony trioxide is a good hiding agent for white paint pigments. It is used as flame retardant for various resins, synthetic rubber canvas, paper, paint, etc. and catalyst for petrochemical industry and synthetic fiber. The product can be used for manufacturing mordants and opalescent agents, white glass, enamel, tartar, medicines, cemented cement, raw materials for synthesizing antimony salt, and additives for enamel industry to increase the opacity and surface gloss of the enamel;
antimony trioxide, which is used in the glass industry as a decolorant in place of arsenous acid, is an inorganic compound having the chemical formula Sb2O 3. The natural product is named as antimony white, commonly named as antimony white and white crystalline powder. Melting point 655 deg.C. The boiling point is 1550 ℃. Dissolving in sodium hydroxide solution, hot tartaric acid solution, tartaric acid hydrogen salt solution and sodium sulfide solution, and slightly dissolving in water 370 + -37 μ g/L, dilute nitric acid and dilute sulfuric acid. Has carcinogenic potential. The preparation method comprises a dry method and a wet method, is mainly used for white pigment, paint and plastics, and can play a role in pigment and flame retardance;
gamma-amidinothiopropyl trihydroxysilane: the gamma-amidinothiopropyl trihydroxysilane can be used as glass fiber vinyl trimethoxy silane and is colorless transparent liquid, and is an organic silane coupling agent for reinforcing polystyrene, polypropylene, styrene-acrylonitrile copolymer and the like;
zinc stearate: can be used as a heat stabilizer; a lubricant; lubricating grease; an accelerator; thickeners and the like are generally used as heat stabilizers for PVC resins, for example. For general industrial transparent articles; it can be used with calcium soap for nontoxic products, and is usually used for soft products, but in recent years, hard transparent products such as mineral water bottle, water supply pipe, etc. have been used, and the product has good lubricity, and can improve scale precipitation phenomenon, and can also be used as lubricant, mold release agent, flatting agent for paint, and additive for coating. Zinc stearate is an organic substance with a chemical formula of C36H70O4Zn, is white powder, and is insoluble in water. Mainly used as a lubricant and a release agent of styrene resin, phenolic resin and amino resin. Meanwhile, the rubber also has the functions of a vulcanization activator and a softener;
a multi-carbon nanotube: the carbon nanotube is used as a composite material reinforcement, and is expected to show good strength, elasticity, fatigue resistance and isotropy, so that the carbon nanotube reinforced composite material can bring a leap of the performance of the composite material. The research on the fabrication of composite materials with nanotubes was first carried out on metal substrates, such as: fe/carbon nanotube, Al/carbon nanotube, Ni/carbon nanotube, Cu/carbon nanotube, etc. The focus of research on carbon nanotube composites has shifted to polymer/carbon nanotube composites, such as in lightweight high strength materials, where carbon fibers are used as reinforcement material, and the mechanical properties of carbon nanotubes and their small diameter and large aspect ratio will bring about better reinforcement effect. The carbon nanotube is another allotrope of carbon found after C60, and has a small radial dimension, the outer diameter of the tube is generally from several nanometers to tens of nanometers, and the inner diameter of the tube is smaller, and some of the tubes are only about 1 nm; the length of the fiber is generally in the micron order, and the length and diameter ratio of the fiber is very large and can reach 103-106. Therefore, carbon nanotubes are considered as a typical one-dimensional nanomaterial.
Claims (6)
1. A low temperature resistant plastic part, characterized by: comprises the following components in percentage by weight,
polyimide, polysulfone resin, epoxy resin, glass fiber, antimony trioxide, gamma-amidino thiopropyl trihydroxysilane, zinc stearate and a multi-carbon nano tube, wherein the mass parts of the components are as follows: 10-20 parts of polyimide, 35-65 parts of polysulfone resin, 25-35 parts of epoxy resin, 2-5 parts of glass fiber, 1-3 parts of antimony trioxide, 1-2 parts of gamma-amidino thiopropyl trihydroxysilane, 0.5-2 parts of zinc stearate and 0.5-0.6 part of multi-carbon nano tube.
2. A low temperature resistant plastic part according to claim 1 wherein: the mass portion of the polyimide is 12-16.
3. A low temperature resistant plastic part according to claim 1 wherein: the multi-carbon nano tube is a Cu/carbon nano tube.
4. A low-temperature resistant plastic part and a preparation method thereof are characterized in that: the method comprises the following steps:
step 1, 10-20 parts of polyimide, 35-65 parts of polysulfone resin, 25-35 parts of epoxy resin, 2-5 parts of glass fiber, 1-3 parts of antimony trioxide, 1-2 parts of gamma-amidinothiopropyl trihydroxysilane, 0.5-2 parts of zinc stearate and 0.5-0.6 part of a multi-carbon nano tube are put into a stirrer to be stirred for 30-60 minutes;
step 2, filtering the stirred liquid through a filter screen to obtain filtrate;
step 3, putting the filtered filtrate ingredients into a mixer;
step 4, filling inert gas into the mixer to make the liquid generate bubbles, and then stirring the liquid by a stirrer to make the liquid mixed more uniformly;
step 5, conveying the uniformly mixed and stirred ingredients to an extruder through a conveying pipe, wherein the temperatures of a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone of the extruder are respectively 55-70 ℃, 65-80 ℃, 75-90 ℃, 85-95 ℃, 85-100 ℃ and 95-110 ℃, the ingredients are extruded into particles through the extruder, and the particles extruded through the extruder are hollow inside or are integrally hollowed out;
step 6, grinding the extruded particles for 0.2min through a grinder by a plastic sucking machine;
step 7, sucking the ground powder by a plastic sucking machine, heating to 150-;
and 8, injecting the melted plastic water into a mold with a corresponding shape through an injection molding machine, keeping the temperature at 150 ℃ and the pressure at 2-5MPa for 0.3-0.5min, then quickly cooling to the normal temperature, and taking out the plastic water from the mold.
5. A low temperature resistant plastic article and method of making as claimed in claim 4 wherein: the inert gas in the step 4 is nitrogen.
6. A low temperature resistant plastic article and method of making as claimed in claim 4 wherein: and melting in the step 5 to ensure that the granule time is 0.1-0.3 min.
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| CN202110884133.XA CN113652087A (en) | 2021-08-02 | 2021-08-02 | Low-temperature-resistant plastic part and preparation method thereof |
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| CN202110884133.XA CN113652087A (en) | 2021-08-02 | 2021-08-02 | Low-temperature-resistant plastic part and preparation method thereof |
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Application publication date: 20211116 |