CN113563665A - Welding type MPP polypropylene power tube and preparation method thereof - Google Patents
Welding type MPP polypropylene power tube and preparation method thereof Download PDFInfo
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- -1 polypropylene Polymers 0.000 title claims abstract description 90
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 82
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000005493 welding type Methods 0.000 title description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 61
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 24
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003063 flame retardant Substances 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 239000000314 lubricant Substances 0.000 claims abstract description 20
- 239000004014 plasticizer Substances 0.000 claims abstract description 20
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 16
- 239000003365 glass fiber Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- 239000004609 Impact Modifier Substances 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 229910021389 graphene Inorganic materials 0.000 claims description 8
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical class CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 6
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 5
- 230000009172 bursting Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 5
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 claims description 4
- VEORPZCZECFIRK-UHFFFAOYSA-N 3,3',5,5'-tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 claims description 4
- BSWXAWQTMPECAK-UHFFFAOYSA-N 6,6-diethyloctyl dihydrogen phosphate Chemical class CCC(CC)(CC)CCCCCOP(O)(O)=O BSWXAWQTMPECAK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical class [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 3
- 239000001913 cellulose Chemical class 0.000 claims description 3
- 229920002678 cellulose Chemical class 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000003466 welding Methods 0.000 abstract description 15
- 239000007789 gas Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of power pipes, and discloses a fusion-type MPP polypropylene power pipe and a preparation method thereof, wherein the fusion-type MPP polypropylene power pipe comprises 80-100 parts of MPP polypropylene resin, 2-3 parts of antioxidant, 8-10 parts of calcium carbonate, 5-7 parts of flame retardant, 2-3 parts of plasticizer, 1-2 parts of stabilizer, 0.3-0.5 part of lubricant, 1-2 parts of dispersant, 8-10 parts of glass fiber, 0.8-1.2 parts of modified graphene and 0.8-1.2 parts of octamethylcyclotetrasiloxane; during preparation, MPP polypropylene resin, antioxidant and calcium carbonate are put into a mixer and are stirred uniformly at the temperature of 115 ℃ and 125 ℃; adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fibers, heating to 135 ℃, adding octamethylcyclotetrasiloxane, adding a plasticizer and modified graphene powder after the temperature is raised in stirring, transferring into a plunger type extruder for extrusion molding, and cooling to obtain the MPP polypropylene power tube. The invention can improve the tensile strength of the MPP polypropylene power pipe and the tensile strength of the welding point of the MPP polypropylene power pipe.
Description
Technical Field
The invention relates to the technical field of power tubes, in particular to a fusion-type MPP polypropylene power tube and a preparation method thereof.
Background
With the rapid development of the electric power field in China, more and more pipe materials are applied to electric power protection at present, and the electric power protection pipe is an important element in the electric power field and plays an excellent role in protecting electric power materials such as electric wires, light rays and cables.
The existing power pipe commonly used in the market comprises an MPP power pipe which is divided into an excavation type power pipe and a non-excavation type power pipe, the MPP power pipe adopts modified polypropylene as a main raw material, and the construction engineering that pipelines, cables and the like are laid in special sections such as roads, railways, buildings, riverbeds and the like without digging, digging and damaging pavements is realized. Compared with the traditional 'trenching and pipe burying method', the trenchless power pipe engineering is more suitable for the current environmental protection requirement, and the disturbing factors such as dust flying, traffic jam and the like caused by the traditional construction are eliminated, so that the technology can also lay pipelines in some areas which can not implement the trenching operation, such as historic site protection areas, downtown areas, crop and farmland protection areas, expressways, rivers and the like. The MPP power tube has excellent electrical insulation, higher thermal deformation temperature and low-temperature impact performance, higher tensile and compression resistance than HDPE, light weight, smoothness, small friction main force and capability of hot-melt welding butt joint.
The construction length of general MPP power pipe is in hundreds of kilometers, and every length of MPP power pipe is 6 meters, so need connect the MPP power pipe in the construction, and the connection of MPP power pipe generally adopts two kinds of modes of hot melt welding and articulate at present to connect. When the heat fusion welding is carried out, firstly, dirt at two ends of the pipe is removed, then, a welding machine is used for heat fusion welding butt joint, a welding point is about 200 degrees and cannot exceed 220 degrees, after the temperature reaches, two ends of the MPP power pipe are in butt joint, and after the pressure is maintained for a few minutes, the welding can be completed by naturally cooling the end part of the MPP power pipe.
Along with the increasing difficulty of electric power engineering construction, the welding quality requirement on the MPP power pipe is also higher and higher, according to the requirement of the MPP power pipe, under the environment temperature of 23 +/-2 ℃, the tensile strength of the MPP power pipe generally reaches more than 24Mpa, while the tensile strength of the current MPP power pipe at a welding point is about 21Mpa, the tensile strength of the welding point is obviously reduced, and the technical requirement of modern electric power engineering on the MPP power pipe, which is higher and higher, cannot be met.
Disclosure of Invention
In view of the above, the present invention provides a welded MPP polypropylene power pipe and a preparation method thereof, which can improve the tensile strength of the MPP polypropylene power pipe, improve the tensile strength of the welding point of the MPP polypropylene power pipe, and meet the increasingly high technical requirements of modern power engineering on the MPP power pipe.
The invention solves the technical problems by the following technical means:
a welding type MPP polypropylene electric power tube comprises, by mass, 80-100 parts of MPP polypropylene resin, 2-3 parts of antioxidant, 8-10 parts of calcium carbonate, 5-7 parts of flame retardant, 2-3 parts of plasticizer, 1-2 parts of stabilizer, 0.3-0.5 part of lubricant, 1-2 parts of dispersant, 8-10 parts of glass fiber, 0.8-1.2 parts of modified graphene and 0.8-1.2 parts of octamethylcyclotetrasiloxane; the modified graphene is graphene for enhancing a C-C covalent bond.
Further, 90 parts of MPP polypropylene resin, 2.5 parts of antioxidant, 9 parts of calcium carbonate, 6 parts of flame retardant, 2.5 parts of plasticizer, 1.5 parts of stabilizer, 0.4 part of lubricant, 1.5 parts of dispersant, 9 parts of glass fiber, 1.0 part of modified graphene and 1.0 part of octamethylcyclotetrasiloxane.
Further, the antioxidant is phosphite triester, the plasticizer is dioctyl phthalate, the stabilizer is lead salt stabilizer, the lubricant is oxidized polyethylene wax, and the flame retardant is one or a combination of decabromodiphenyl ether, tetrabromobisphenol A and decabromodiphenyl ethane.
Further, the dispersing agent is one or more of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyacrylamide.
Further, the MPP polypropylene power pipe also comprises 6-8 parts of an impact modifier, wherein the impact modifier is one or a combination of chlorinated polyethylene, styrene butadiene rubber, ethylene propylene rubber and styrene-butadiene-styrene copolymer.
In the raw materials of the MPP polypropylene power tube, the antioxidant can improve the oxidation resistance and aging resistance of the MPP polypropylene power tube; the calcium carbonate is used as the heat-resistant filler, so that the heat resistance of the MPP power pipe can be effectively improved; the flame retardant can improve the flame retardant property of the MPP polypropylene power tube; the plasticizer can increase the plasticity of the MPP polypropylene power tube and improve the strength of the power tube; the stabilizer can increase the thermal stability of the MPP polypropylene power tube; the lubricant can improve the smoothness of the MPP polypropylene power pipe, and is beneficial to the power construction of the MPP polypropylene power pipe; the dispersing agent can uniformly disperse all raw materials, so that the stability of the performance of the MPP polypropylene power tube is improved; the glass fiber is a heat-resistant material, has excellent heat resistance and elasticity, is matched with calcium carbonate to act, and can greatly improve the heat resistance of the MPP polypropylene power tube; the impact modifier can be matched with other raw materials for action and synergistic reaction, can effectively improve the impact strength of the MPP polypropylene, improves the processability and weather resistance of the MPP polypropylene, and does not influence the apparent performance and physical and mechanical properties of the MPP polypropylene; modified graphite alkene has the netted C-C structure of high strength, and octamethylcyclotetrasiloxane can stretch MPP polypropylene resin's molecular chain, and when hot melt connection, the molecular chain of polypropylene resin's molecular chain can enter into the netted C-C structure of modified graphite alkene, forms the tangle of electric power pipe both ends MPP polypropylene molecular chain to the breaking force of MPP polypropylene resin molecular chain when the reinforcing is tensile at the electric power pipe, and then promotes the tensile strength of MPP polypropylene electric power pipe splice.
The invention also discloses a preparation method of the welding type MPP polypropylene power tube, which uses the raw materials of the MPP polypropylene power tube and comprises the following steps:
a1, mixing MPP polypropylene resin, an antioxidant and calcium carbonate, putting into a high-speed mixer, and uniformly stirring at the temperature of 115 ℃ and 125 ℃;
a2, adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fiber, heating to 135 ℃, stirring uniformly, adding octamethylcyclotetrasiloxane and an impact modifier, and raising the temperature to 140-145 ℃ in the stirring process;
and A3, adding a plasticizer and modified graphene powder, stirring, transferring into a plunger type extruder, setting the temperature of a host machine at 160-165 ℃, the temperature of a die at 165-170 ℃, the temperature of a neck die at 170-175 ℃, performing extrusion molding, and cooling to obtain the MPP polypropylene power tube.
Further, in the step A2, after the octamethylcyclotetrasiloxane is added, the stirring time is controlled to be 20-40 min; in the step A3, after the modified graphene powder is added, the stirring time is controlled to be 40-60 mim.
Further, the preparation method of the modified graphene comprises the following steps:
b1, adding 80-100 parts by mass of 800-mesh flaky graphite powder with the particle size of 600-;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas; sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and microscopically bursting to strip out the primary modified graphene;
b3, adding the prepared graphene into absolute ethyl alcohol, and dispersing by using ultrasonic;
and B4, adding 20-40 parts by mass of gamma-aminopropyltriethoxysilane and 40-50 parts by mass of acetic acid, heating to 65-75 ℃, and reacting for 12-18h under ultrasonic stirring to obtain the modified graphene.
The scaly graphite powder is put into aminosilane and boric acid solution, and then micro-cracking is generated to strip out the primary modified graphene which is subjected to carbonyl and carbon hydroxylation; preliminary modified graphene is in gamma-aminopropyltriethoxysilane and acetic acid reaction, can be so that the covalent bond between the C-C in the graphene is strengthened, when the MPP power tube is being welded, high temperature can make MPP polypropylene resin melt, octamethylcyclotetrasiloxane straightens the polypropylene molecule after melting, the molecular chain enters into the C-C network structure of graphite alkene and entangles, thereby increase the entanglement stability between the MPP polypropylene resin, make the tensile strength of MPP power tube welding department stronger.
Further, the ultrasonic dispersion time in the steps B1 and B3 is 20-30 min.
The invention has the beneficial effects that:
the modified graphene has a high-strength net-shaped C-C structure, the octamethylcyclotetrasiloxane can stretch molecular chains of MPP polypropylene resin, and when the modified graphene is in hot-melt connection, the molecular chains of the polypropylene resin can enter the net-shaped C-C structure of the modified graphene to form entanglement of the MPP polypropylene molecular chains at two ends of the power tube, so that the breaking force of the MPP polypropylene resin molecular chains during stretching of the power tube is enhanced, the tensile strength of a welding point of the MPP polypropylene power tube is further improved, and the increasingly high technical requirements of modern power engineering on the MPP power tube are met.
Detailed Description
The present invention will be described in detail with reference to examples below:
examples 1,
In this embodiment, the preparation of the modified graphene is performed, and the method includes the following steps:
adding 80g of scaly graphite powder with the particle size of 600 meshes into 30g of aminosilane and 25g of boric acid solution with the mass concentration of 0.8mol/L for ultrasonic dispersion for 20min, sealing the mixture in a stainless steel high-pressure bottle with the vacuum degree of-0.03 Mpa, slowly pumping air out of the stainless steel high-pressure bottle, filling liquid nitrogen into the stainless steel high-pressure bottle, shaking uniformly, and standing for 10 h. Connecting a stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas; and sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and microscopically bursting to strip out the primary modified graphene. Adding the prepared graphene into absolute ethyl alcohol, and dispersing for 20min by using ultrasonic. Adding 20g of gamma-aminopropyltriethoxysilane and 40g of acetic acid, heating to 65 ℃, and then reacting for 12h under ultrasonic stirring to obtain the modified graphene.
Examples 2,
Taking 90g of scaly graphite powder with the particle size of 700 meshes, adding 35g of aminosilane and 30g of boric acid solution with the mass concentration of 1.15mol/L, carrying out ultrasonic dispersion for 25min, placing the mixture in a stainless steel high-pressure bottle with the vacuum degree of 0Mpa, sealing, slowly pumping air out of the stainless steel high-pressure bottle, then filling liquid nitrogen into the stainless steel high-pressure bottle, shaking uniformly, and standing for 12 h. Connecting a stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas; and sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and microscopically bursting to strip out the primary modified graphene. Adding the prepared graphene into absolute ethyl alcohol, and dispersing for 25min by using ultrasonic. Adding 30g of gamma-aminopropyltriethoxysilane and 45g of acetic acid, heating to 70 ℃, and then reacting for 15h under ultrasonic stirring to obtain the modified graphene.
Examples 3,
100g of scaly graphite powder with the particle size of 800 meshes is taken and added into 40g of aminosilane and 35g of boric acid solution with the mass concentration of 1.5mol/L for ultrasonic dispersion for 30min, the mixture is placed into a stainless steel high-pressure bottle with the vacuum degree of 0.05Mpa for sealing, air in the stainless steel high-pressure bottle is slowly pumped away, then liquid nitrogen is filled into the stainless steel high-pressure bottle, and the stainless steel high-pressure bottle is shaken up and kept stand for 15 h. Connecting a stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas; and sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and microscopically bursting to strip out the primary modified graphene. Adding the prepared graphene into absolute ethyl alcohol, and dispersing for 30min by using ultrasonic. Adding 40g of gamma-aminopropyltriethoxysilane and 50g of acetic acid, heating to 75 ℃, and reacting for 18h under ultrasonic stirring to obtain the modified graphene.
Examples 4,
In this embodiment, the preparation method of the welding-type MPP polypropylene power tube includes the following steps: mixing MPP polypropylene resin, an antioxidant and calcium carbonate, putting into a high-speed mixer, and uniformly stirring at the temperature of 115 ℃; then adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fiber, heating to 135 ℃, stirring uniformly, adding octamethylcyclotetrasiloxane and an impact modifier, and raising the temperature to 140 ℃ in the stirring process; and adding a plasticizer and modified graphene powder, stirring, transferring into a plunger type extruder, setting the temperature of a host machine to be 160 ℃, the temperature of a die to be 165 ℃ and the temperature of a neck ring to be 170 ℃, performing extrusion molding, and cooling to obtain the MPP polypropylene power tube.
The MPP polypropylene resin in this example was 80kg, the antioxidant was 2kg, the calcium carbonate was 8kg, the flame retardant was 5kg, the plasticizer was 2kg, the stabilizer was 1kg, the lubricant was 0.3kg, the dispersant was 1kg, the glass fiber was 8kg, the modified graphene was 0.8kg, the octamethylcyclotetrasiloxane was 0.8kg, and the impact modifier was 6 kg.
The modified graphene in this embodiment is the modified graphene prepared by the preparation method of embodiment 2.
Wherein the antioxidant is phosphite triester; the plasticizer is dioctyl phthalate; the stabilizer is a lead salt stabilizer; the lubricant is oxidized polyethylene wax; the flame retardant is decabromodiphenyl ether; the dispersant is triethyl hexyl phosphoric acid; the impact modifier is chlorinated polyethylene.
Examples 5,
In this embodiment, the preparation method of the welding-type MPP polypropylene power tube includes the following steps: mixing MPP polypropylene resin, an antioxidant and calcium carbonate, putting into a high-speed mixer, and uniformly stirring at 120 ℃; then adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fiber, heating to 135 ℃, stirring uniformly, adding octamethylcyclotetrasiloxane and an impact modifier, and raising the temperature to 143 ℃ in the stirring process; and adding a plasticizer and modified graphene powder, stirring, transferring into a plunger type extruder, setting the temperature of a main machine to be 163 ℃, the temperature of a die to be 168 ℃, the temperature of a neck ring to be 173 ℃, performing extrusion molding, and cooling to obtain the MPP polypropylene power tube.
The MPP polypropylene resin in this example was 90kg, the antioxidant was 2.5kg, the calcium carbonate was 9kg, the flame retardant was 6kg, the plasticizer was 2.5kg, the stabilizer was 1.5kg, the lubricant was 0.4kg, the dispersant was 1.5kg, the glass fiber was 9kg, the modified graphene was 1.0kg, octamethylcyclotetrasiloxane was 1.0kg, and the impact modifier was 7 kg.
The modified graphene in this embodiment is the modified graphene prepared by the preparation method of embodiment 2.
Wherein the antioxidant is phosphite triester; the plasticizer is dioctyl phthalate; the stabilizer is a lead salt stabilizer; the lubricant is oxidized polyethylene wax;
the flame retardant is a combination of tetrabromobisphenol A and decabromodiphenylethane, and the mass ratio is 1: 1;
the dispersing agent is the combination of sodium dodecyl sulfate and methyl amyl alcohol, and the mass ratio is 1: 1.
The impact modifier is the combination of styrene butadiene rubber and ethylene propylene rubber, and the mass ratio is 1: 1.
Examples 6,
In this embodiment, the preparation method of the welding-type MPP polypropylene power tube includes the following steps: mixing MPP polypropylene resin, an antioxidant and calcium carbonate, putting into a high-speed mixer, and uniformly stirring at the temperature of 125 ℃; then adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fiber, heating to 135 ℃, stirring uniformly, adding octamethylcyclotetrasiloxane and an impact modifier, and raising the temperature to 145 ℃ in the stirring process; and adding a plasticizer and modified graphene powder, stirring, transferring into a plunger type extruder, setting the temperature of a host machine to be 165 ℃, the temperature of a die to be 170 ℃, the temperature of a neck ring to be 175 ℃, performing extrusion molding, and cooling to obtain the MPP polypropylene power tube.
The MPP polypropylene resin in this example was 100kg, the antioxidant was 3kg, the calcium carbonate was 10kg, the flame retardant was 7kg, the plasticizer was 3kg, the stabilizer was 2kg, the lubricant was 0.5kg, the dispersant was 2kg, the glass fiber was 10kg, the modified graphene was 1.2kg, the octamethylcyclotetrasiloxane was 1.2kg, and the impact modifier was 8 kg.
The modified graphene in this embodiment is the modified graphene prepared by the preparation method of embodiment 2.
Wherein the antioxidant is phosphite triester; the plasticizer is dioctyl phthalate; the stabilizer is a lead salt stabilizer; the lubricant is oxidized polyethylene wax;
the flame retardant is a combination of decabromodiphenyl ether, tetrabromobisphenol A and decabromodiphenyl ethane, and the mass ratio is 1:1: 1;
the dispersing agent is a combination of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyacrylamide in a mass ratio of 1:1:1:1: 1.
The impact modifier is a combination of chlorinated polyethylene, styrene-butadiene rubber, ethylene-propylene rubber and a styrene-butadiene-styrene copolymer in a mass ratio of 1:1:1: 1.
Example 7,
Example 7 is compared to example 5, differing only in that: example 7 modified graphene used was the modified graphene prepared by the preparation method of example 1.
Example 8,
Example 8 is compared to example 5, differing only in that: example 8 the modified graphene used was the modified graphene prepared by the preparation method of example 3.
The MPP polypropylene power pipes prepared in examples 4 to 8 and the conventional MPP polypropylene power pipe are welded, and the welded MPP polypropylene power pipe is tested for tensile strength, wherein the specific tensile strength test method is performed according to the standard of GB/T1040-90, and the specific results are as follows:
from the tensile test results of the power tubes prepared in examples 5 to 8 above and the conventional power tube, it can be seen that:
1. the MPP polypropylene power tube prepared by the method has stronger tensile resistance than that of the existing power tube at the temperature of 23 +/-2 ℃ and 70 +/-2 ℃.
2. The MPP polypropylene electric power pipe prepared by the method has the advantages that the tensile resistance of the electric power pipe welding point is higher than that of the existing electric power pipe at the temperature of 23 +/-2 ℃ and 70 +/-2 ℃.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (9)
1. The utility model provides a butt fusion type MPP polypropylene power pipe, raw and other materials include MPP polypropylene resin, its characterized in that: the MPP polypropylene resin is 80-100 parts by mass, and the raw materials of the MPP polypropylene power tube further comprise 2-3 parts of an antioxidant, 8-10 parts of calcium carbonate, 5-7 parts of a flame retardant, 2-3 parts of a plasticizer, 1-2 parts of a stabilizer, 0.3-0.5 part of a lubricant, 1-2 parts of a dispersant, 8-10 parts of glass fiber, 0.8-1.2 parts of modified graphene and 0.8-1.2 parts of octamethylcyclotetrasiloxane; the modified graphene is graphene for enhancing a C-C covalent bond.
2. A fused MPP polypropylene power tube as set forth in claim 1, wherein: the MPP polypropylene resin comprises, by weight, 90 parts of MPP polypropylene resin, 2.5 parts of an antioxidant, 9 parts of calcium carbonate, 6 parts of a flame retardant, 2.5 parts of a plasticizer, 1.5 parts of a stabilizer, 0.4 part of a lubricant, 1.5 parts of a dispersant, 9 parts of glass fiber, 1.0 part of modified graphene and 1.0 part of octamethylcyclotetrasiloxane.
3. A fused MPP polypropylene power tube as set forth in claim 2, wherein: the antioxidant is phosphite triester, the plasticizer is dioctyl phthalate, the stabilizer is lead salt stabilizer, the lubricant is oxidized polyethylene wax, and the flame retardant is one or a combination of more of decabromodiphenyl ether, tetrabromobisphenol A and decabromodiphenyl ethane.
4. A fused MPP polypropylene power tube as set forth in claim 3, wherein: the dispersing agent is one or a combination of more of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyacrylamide.
5. A fused MPP polypropylene power tube as set forth in any one of claims 1-4, wherein: the MPP polypropylene power pipe also comprises 6-8 parts of impact modifier, wherein the impact modifier is one or a combination of chlorinated polyethylene, styrene-butadiene rubber, ethylene-propylene rubber and styrene-butadiene-styrene copolymer.
6. A preparation method of a fusion-type MPP polypropylene power tube is characterized by comprising the following steps: the manufacturing method using the MPP polypropylene power tube raw material of claim 5, the manufacturing method comprising the steps of:
a1, mixing MPP polypropylene resin, an antioxidant and calcium carbonate, putting into a high-speed mixer, and uniformly stirring at the temperature of 115 ℃ and 125 ℃;
a2, adding a flame retardant, a stabilizer, a lubricant, a dispersant and glass fiber, heating to 135 ℃, stirring uniformly, adding octamethylcyclotetrasiloxane and an impact modifier, and raising the temperature to 140-145 ℃ in the stirring process;
and A3, adding a plasticizer and modified graphene powder, stirring, transferring into a plunger type extruder, setting the temperature of a host machine at 160-165 ℃, the temperature of a die at 165-170 ℃, the temperature of a neck die at 170-175 ℃, performing extrusion molding, and cooling to obtain the MPP polypropylene power tube.
7. The method for preparing a fused MPP polypropylene power tube as set forth in claim 6, wherein: in the step A2, after the octamethylcyclotetrasiloxane is added, the stirring time is controlled to be 20-40 min; in the step A3, after the modified graphene powder is added, the stirring time is controlled to be 40-60 mim.
8. The method for preparing a fused MPP polypropylene power tube as set forth in claim 7, wherein: the preparation method of the modified graphene comprises the following steps:
b1, adding 80-100 parts by mass of 800-mesh flaky graphite powder with the particle size of 600-;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas; sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and microscopically bursting to strip out the primary modified graphene;
b3, adding the prepared graphene into absolute ethyl alcohol, and dispersing by using ultrasonic;
and B4, adding 20-40 parts by mass of gamma-aminopropyltriethoxysilane and 40-50 parts by mass of acetic acid, heating to 65-75 ℃, and reacting for 12-18h under ultrasonic stirring to obtain the modified graphene.
9. The method for preparing a fused MPP polypropylene power tube as set forth in claim 8, wherein: the ultrasonic dispersion time in the steps B1 and B3 is 20-30 min.
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