CN115947990A - Polypropylene reinforced material for household booster pump volute and preparation method thereof - Google Patents
Polypropylene reinforced material for household booster pump volute and preparation method thereof Download PDFInfo
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- CN115947990A CN115947990A CN202211617478.XA CN202211617478A CN115947990A CN 115947990 A CN115947990 A CN 115947990A CN 202211617478 A CN202211617478 A CN 202211617478A CN 115947990 A CN115947990 A CN 115947990A
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- polypropylene
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 97
- -1 Polypropylene Polymers 0.000 title claims abstract description 96
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 90
- 239000000463 material Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title abstract description 19
- 239000003365 glass fiber Substances 0.000 claims abstract description 57
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 25
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- 230000003078 antioxidant effect Effects 0.000 claims abstract description 22
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims abstract description 18
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- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000004381 surface treatment Methods 0.000 claims abstract description 10
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000005977 Ethylene Substances 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 15
- 239000012779 reinforcing material Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000012661 block copolymerization Methods 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000007605 air drying Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 238000003828 vacuum filtration Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 5
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000012760 heat stabilizer Substances 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- 150000002989 phenols Chemical class 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 150000007970 thio esters Chemical class 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 229920005629 polypropylene homopolymer Polymers 0.000 abstract description 9
- 239000011259 mixed solution Substances 0.000 abstract description 5
- 229920001400 block copolymer Polymers 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
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- 229920003023 plastic Polymers 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
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- 239000002131 composite material Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
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- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 239000002216 antistatic agent Substances 0.000 description 1
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- 229920000891 common polymer Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 229930182470 glycoside Natural products 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 239000004611 light stabiliser Substances 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a polypropylene reinforced material for a volute of a household booster pump and a preparation method thereof, wherein the polypropylene reinforced material comprises the following raw materials in parts by mass: 35-76 parts of injection molding grade homo-polypropylene with 13-17g/10min of melt index, 0-30 parts of block copolymer polypropylene with 18% of ethylene content and 1-3g/10min of melt index, 20-30 parts of chopped glass fiber, 4-5 parts of compatilizer, 0.2-0.3 part of silane coupling agent, 0.1-0.2 part of antioxidant and 0.1-0.2 part of lubricant; the preparation method comprises the following steps: s1, selecting materials; s2, preparing a mixed solution; s3, performing surface treatment on the chopped glass fibers; s4, mixing and stirring; s5, preparing a primary material; s6, cutting into granules; the invention is prepared from isotactic polypropylene homopolymer, block copolymer polypropylene, chopped glass fiber, compatilizer, lubricant and antioxidant, and optimizes the pain points of the upper volute of the household booster pump on low water pressure burst strength and poor low-temperature toughness.
Description
Technical Field
The invention belongs to the technical field of polymers, and particularly relates to a polypropylene reinforcing material for a volute of a household booster pump and a preparation method thereof.
Background
The booster pump is a water pumping machine utilizing centrifugal motion of water, and is formed from pump shell, impeller, pump shaft and motor, etc., and the exhaust function of the volute of the booster pump is to discharge air so as to make it be filled with water before starting the pump for the first time, and in the booster pump the volute shell is cast by using lead bronze and nickel aluminium bronze. Its advantages are high mechanical and anticorrosion performance, high comprehensive cost and high weight of whole machine. The common polymer composite material for the household booster pump has the advantages of easy processing and forming and light weight of the whole machine. The disadvantage is that the water pressure resistant blasting grade is low, and the booster pump with the power of more than 450W is not suitable to be used. And the material has poor low-temperature toughness, and has low-temperature frost cracking and falling cracking risks in northern areas of China. The product is adaptive; durability is limited. Therefore, the polypropylene reinforced material is significant for developing a polypropylene reinforced material for the volute of the household booster pump.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a polypropylene reinforced material for a volute of a household booster pump and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a polypropylene reinforced material for a household booster pump volute comprises the following raw materials in parts by mass: 35-76 parts of injection molding grade homopolymerized polypropylene with the melting index of 13-17g/10min, 0-30 parts of block copolymerization polypropylene with the ethylene content of 18% and the melting index of 1-3g/10min, 20-30 parts of chopped glass fiber, 4-5 parts of compatilizer, 0.2-0.3 part of silane coupling agent, 0.1-0.2 part of antioxidant and 0.1-0.2 part of lubricant.
Furthermore, the chopped glass fiber is alkali-free glass fiber with the diameter of 13 mu m, the chopped length of 4mm and the water content of less than or equal to 3 percent.
Further, the silane coupling agent is at least one of butadiene-based triethoxysilane and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide.
Further, the compatilizer is polypropylene grafted maleic anhydride with the grafting rate of 2%; the antioxidant is at least one of hindered phenols, thioesters and phosphite heat stabilizers
Further, the lubricant is at least one of polyethylene wax, stearate, ethylene bis-stearamide and grafted ethylene bis-stearamide.
The preparation method of the polypropylene reinforced material for the volute of the household booster pump comprises the following steps:
s1, weighing various raw materials according to a mass ratio;
s2, mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed, standing at room temperature, carrying out vacuum filtration, and drying the mixture in an electric heating constant-temperature forced air drying box to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, adding the weighed polypropylene, the compatilizer, the antioxidant and the lubricant into a mixer filled with nitrogen protection for high-speed mixing;
s5, after mixing, putting the mixed materials into a parallel double-screw extruder for melting, adding the chopped glass fibers after surface treatment from a side feeding port of the extruder, and extruding to obtain a primary material of the polypropylene reinforcing material for the household booster pump volute;
and S6, placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the polypropylene reinforced material for the household booster pump volute.
And further, in the step S3, stirring and refluxing are controlled for 10-15 min, standing is carried out for 11-13 h at room temperature, and the temperature in an electric heating constant-temperature air-blast drying oven is 75-83 ℃.
Further, the high-speed mixing time of the mixer in the S4 is controlled to be 2-10 min.
Furthermore, in the S5, the temperature of a cylinder of the extruder is controlled to be 205-210 ℃, the rotating speed of a screw is controlled to be 400-600 r/min, and the vacuum degree is controlled to be-0.04-0.1 MPa.
The volute of the household booster pump is made of the polypropylene reinforced material.
The invention has the beneficial effects that:
1. compared with the common homopolymerization polypropylene reinforced material, the polypropylene reinforced material for the household booster pump volute provided by the invention improves the water pressure bursting pressure and the low temperature resistance of the booster pump volute
2. The polypropylene reinforcing material for the household booster pump volute is prepared from an injection-grade homopolymerized PP compound block copolymerization polypropylene base material, chopped glass fiber, a compatilizer, a lubricant and an antioxidant, and has the functions of a nucleating agent due to the existence of ethylene propylene random copolymer (EPR) in the block copolymerization polypropylene, so that the total crystallization rate is increased, and compared with the traditional polypropylene reinforced plastic, the polypropylene reinforcing material for the household booster pump volute is prepared under the condition of optimal injection molding technological parameters; the injection molding period is shortened, and the purposes of saving energy, reducing emission and improving the unit time benefit are achieved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for preparing a polypropylene reinforcement material according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the injection molding grade homopolypropylene used in the following examples has a melt index of 13-17g/10min; the ethylene content in the block copolymerization polypropylene is 15-20%, and the melt index is 1-3g/10min; the chopped glass fiber is alkali-free glass fiber with the diameter of 13-15 mu m, the chopped length of 3-4.5mm and the water content of less than or equal to 3 percent; the silane coupling agent is at least one of butadiene triethoxy silane and bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide (Si-69); the compatilizer is polypropylene grafted maleic anhydride with the grafting rate of 1.5-2.0%; the antioxidant is at least one of hindered phenols, thioesters and phosphite heat stabilizers; the lubricant is at least one of polyethylene wax, stearate, ethylene bis-stearamide and grafted ethylene bis-stearamide.
Example 1
The polypropylene reinforced material for the volute of the household booster pump comprises the following raw materials in parts by mass: 76 injection molding grade homopolymerized polypropylene (Wuhan petrochemical industry Co., ltd., brand: homopolymerized PP SV30G, melt index 13-17G/10 min); 20 parts of chopped glass fiber (Euvensonin glass fiber Co., ltd., trade name: CS248A-13P, chopped length 4 mm); a compatibilizer (Shenyang Ketong plastics Co., ltd., brand: KT-1, grafting ratio 2%) 4; 0.3 of silane coupling agent (Nanjing flying chemical research institute, trade name: KH 550); 0.2 of antioxidant (St. Laiko chemical Co., ltd., brand: S2225P); lubricant (Suzhouxing Thailand photochemical adjuvant, inc., brand: food grade TAF) 0.2.
As shown in fig. 1, a method for preparing a polypropylene reinforced material for a volute of a household booster pump comprises the following steps:
s1, selecting materials
Weighing 76 kg of injection molding grade homo-polypropylene, 20 kg of chopped glass fiber, 4 kg of compatilizer, 0.3 kg of silane coupling agent, 0.2 kg of antioxidant and 0.2 kg of lubricant according to the mass ratio;
s2, preparation of mixed solution
Mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, surface treatment of chopped glass fibers
Drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed for 10min, standing at room temperature for 12h, carrying out vacuum filtration, and drying in an electrothermal constant-temperature forced air drying oven at 80 ℃ to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, mixing and stirring
Adding the weighed injection molding grade homopolymerized polypropylene, compatilizer, antioxidant and lubricant into a mixer with nitrogen protection, and mixing at high speed for 2min;
s5, preparation of initial material
After mixing, putting the mixed material into a parallel double-screw extruder for melting, adding the chopped glass fiber after surface treatment from a side feeding port of the extruder, and extruding to prepare a primary material of the polypropylene reinforcing material special for the water pump, wherein the barrel temperature of the extruder is 205 ℃, the screw rotating speed is 400r/min, and the vacuum degree is-0.04 MPa;
s6, granulating
And (3) placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the polypropylene reinforced material for the household booster pump volute, wherein the granulator is a biaxial speed-adjustable granulator, and the particle length of the cut preliminary material is controlled to be 7mm.
Example 2
The polypropylene reinforced material for the volute of the household booster pump comprises the following raw materials in parts by mass: 65 parts of injection molding grade homopolymerized polypropylene (Wuhan petrochemical industry Co., ltd., brand: homopolymerized PP SV30G, melt index 13-17G/10 min); 30 parts of chopped glass fibers (European Union glass fibers, inc., CS248A-13P, chopped length 4 mm); a compatibilizer (Shenyang Ketong plastics Co., ltd., trade name: KT-1, graft ratio 2%) (5); 0.3 of silane coupling agent (Nanjing Xiangfei chemical research institute, trade name: KH 550); 0.2 of antioxidant (St. Laiko chemical Co., ltd., brand: S2225P); lubricant (Suzhongxing Thailand photochemical assistant Co., ltd., brand: food grade TAF) 0.2.
A preparation method of a polypropylene reinforced material for a volute of a household booster pump comprises the following steps:
s1, selecting materials
Weighing 65 kg of injection molding grade homo-polypropylene, 30 kg of chopped glass fiber, 5 kg of compatilizer, 0.3 kg of silane coupling agent, 0.2 kg of antioxidant and 0.2 kg of lubricant according to the mass ratio;
s2, preparation of mixed solution
Mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, surface treatment of chopped glass fibers
Drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed for 10min, standing at room temperature for 12h, performing vacuum filtration, and drying in an electric heating constant temperature forced air drying oven at 80 ℃ to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, mixing and stirring
Adding the weighed injection molding grade homopolymerized polypropylene, compatilizer, antioxidant and lubricant into a mixer with nitrogen protection, and mixing at high speed for 2min;
s5, preparation of primary material
After mixing, putting the mixed material into a parallel double-screw extruder for melting, adding the chopped glass fiber after surface treatment from a side feeding port of the extruder, and extruding to prepare a primary material of the polypropylene reinforcing material special for the water pump, wherein the barrel temperature of the extruder is 205 ℃, the screw rotating speed is 400r/min, and the vacuum degree is-0.04 MPa;
s6, granulating
And (3) placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the special high-strength high-explosion polypropylene reinforced material for the water circuit board of the household water purifier, wherein the granulator is a double-shaft speed-adjustable granulator, and the length of the cut preliminary material particles is controlled to be 7mm.
Example 3
The polypropylene reinforced material for the volute of the household booster pump comprises the following raw materials in parts by mass: injection molding grade homopolymerized polypropylene (Wuhan petrochemical industry Co., ltd., brand: homopolymerized PP SV30G, melt index 13-17G/10 min) 46; block copolymerization polypropylene (Yanshan petrochemical industry Co., ltd., brand: PP K8303, ethylene mass fraction of 18%, melt index of 1-3g/10 min) 30; 20 parts of chopped glass fiber (Euvensonin glass fiber Co., ltd., trade name: CS248A-13P, chopped length 4 mm); a compatibilizer (Shenyang Ketong plastics Co., ltd., brand: KT-1, grafting ratio 2%) 4; 0.3 of silane coupling agent (Nanjing flying chemical research institute, trade name: KH 550); 0.2 of antioxidant (St. Laiko chemical Co., ltd., brand: S2225P); lubricant (Suzhouxing Thailand photochemical adjuvant, inc., brand: food grade TAF) 0.2.
A preparation method of a polypropylene reinforced material for a volute of a household booster pump comprises the following steps:
s1, selecting materials
Weighing the raw materials according to the mass ratio, and weighing 46 kg of injection molding grade homo-polypropylene, 30 kg of block copolymerization polypropylene, 30 kg of chopped glass fiber, 5 kg of compatilizer, 0.2 kg of silane coupling agent, 0.1 kg of antioxidant and 0.1 kg of lubricant;
s2, preparation of mixed solution
Mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, surface treatment of chopped glass fibers
Drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed for 12min, standing at room temperature for 13h, carrying out vacuum filtration, and drying in an electric heating constant temperature forced air drying oven at 75 ℃ to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, mixing and stirring
Adding the weighed injection molding grade homo-polypropylene, block co-polypropylene, compatilizer, antioxidant and lubricant into a mixer with nitrogen protection, and mixing at high speed for 10min;
s5, preparation of primary material
After mixing, putting the mixed material into a parallel double-screw extruder for melting, adding the surface-treated chopped glass fiber from a side feeding port of the extruder, and extruding to obtain a primary material of the polypropylene reinforcing material special for the water pump, wherein the barrel temperature of the extruder is 220 ℃, the screw rotating speed is 600r/min, and the vacuum degree is 0.1MPa;
s6, granulating
And (3) placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the polypropylene reinforced material for the household booster pump volute, wherein the granulator is a biaxial speed-adjustable granulator, and the particle length of the cut preliminary material is controlled to be 11mm.
Example 4
The polypropylene reinforced material for the household booster pump volute comprises the following raw materials in parts by mass: 35 parts of injection molding grade homopolymerized polypropylene (Wuhan petrochemical industry Co., ltd., brand: homopolymerized PP SV30G, melt index 13-17G/10 min); block copolymerization polypropylene (Yanshan petrochemical industry Co., ltd., brand: PP K8303, ethylene mass fraction of 18%, melt index of 1-3g/10 min) 30; 30 parts of chopped glass fibers (European Union glass fibers, inc., CS248A-13P, chopped length 4 mm); a compatibilizer (Shenyang Ketong plastics Co., ltd., brand: KT-1, grafting ratio 2%) (5); 0.3 of silane coupling agent (Nanjing Xiangfei chemical research institute, trade name: KH 550); 0.2 of antioxidant (St. Laiko specialties chemical Co., ltd., brand: S2225P); lubricant (Suzhongxing Thailand photochemical assistant Co., ltd., brand: food grade TAF) 0.2.
A preparation method of a polypropylene reinforced material for a household booster pump volute comprises the following steps:
s1, selecting materials
Weighing various raw materials according to the mass ratio, and weighing 35 kg of injection molding grade homo-polypropylene, 30 kg of block co-polypropylene, 30 kg of chopped glass fiber, 5 kg of compatilizer, 0.3 kg of silane coupling agent, 0.2 kg of antioxidant and 0.2 kg of lubricant;
s2, preparation of mixed solution
Mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, surface treatment of chopped glass fibers
Drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed for 15min, standing at room temperature for 11h, performing vacuum filtration, and drying in an electrothermal constant-temperature forced air drying oven at 83 ℃ to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, mixing and stirring
Adding the weighed injection molding grade homo-polypropylene, block co-polypropylene, compatilizer, antioxidant and lubricant into a mixer with nitrogen protection, and mixing at high speed for 8min;
s5, preparation of primary material
After mixing, putting the mixed material into a parallel double-screw extruder for melting, adding the chopped glass fiber after surface treatment from a side feeding port of the extruder, and extruding to obtain a primary material of the polypropylene reinforcing material special for the water pump, wherein the barrel temperature of the extruder is 210 ℃, the rotating speed of a screw is 500r/min, and the vacuum degree is 0.05MPa;
s6, granulating
Experimental data:
and (3) placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the polypropylene reinforced material for the household booster pump volute, wherein the granulator is a biaxial speed-adjustable granulator, and the particle length of the cut preliminary material is controlled to be 10mm.
The main physical indexes of the polypropylene reinforced material for the volute of the household booster pump prepared in the embodiments 1, 2, 3 and 4 are tested according to related test standards, such as melt index, tensile strength, elongation at break, bending strength, bending modulus, izod notched impact strength, density, ash content, representative model burst pressure and brittle temperature, and the test standards and test results are shown in table 1:
table 1: main physical property indexes of polypropylene reinforced material for household booster pump volutes of examples 1, 2, 3 and 4
As can be seen from table 1:
(1) The difference between the second example and the first example is that the glass fiber content is selected in different proportions, and the glass fiber is connected with the resin interface, so that the glass fiber plays a role of a framework, force acting on the sample strip is transmitted to the glass fiber, the strength of the glass fiber is fully utilized, the purpose of resin reinforcement is achieved, and the polypropylene grafted maleic acid glycoside improves the compatibility of polypropylene and the glass fiber. Along with the increase of the parts of the chopped glass fibers, the overall mechanical property of the material is greatly improved. But the hydraulic bursting strength and the low-temperature embrittlement temperature are not obviously improved, which is a common solution of a volute casing reinforced polypropylene material of a booster pump on the market.
(2) In the third embodiment, compared with the first embodiment, 30 parts of block copolymer polypropylene is added, the block copolymer polypropylene contains more ethylene propylene rubber phases, and when a pump body develops microcracks under the pressure of water, the ethylene propylene rubber phases in the composite material play an elastomer role, so that the fracture caused by further expansion of the microcracks can be effectively prevented. Meanwhile, the block copolymerization polypropylene with 1-3g/10min of melt fingers is selected, the relative molecular mass is higher, the acting force between molecular chains is increased, the length of the monomer molecular chain is higher, the entanglement degree between the molecular chains is improved, the material melt strength is greatly improved, and finally the water pressure burst strength of the volute is improved by about 40%.
According to structural analysis, polypropylene in the block copolymerization polypropylene is in a continuous phase, ethylene propylene spherical rubber particles are in a dispersed phase, and the low-temperature embrittlement temperature of the material is greatly improved due to the sea-island structural phase morphology. And finally, the low-temperature embrittlement temperature point of the composite material is reduced by about 10 ℃. The requirement of the lowest use environment temperature of-20 ℃ of the household booster pump is met.
(3) Example 4 has 30 parts of block copolymerized polypropylene compared with example two, the action principle is consistent with (2), and the description is omitted.
It should be noted that:
1. according to the booster pumps with different power models of target client enterprises, different requirements are imposed on the standard value of the hydraulic pressure explosion pressure, generally between 8 and 30bar, and the power of the whole booster pump is positively correlated with the standard value.
2. The hydraulic bursting pressure test is carried out on the volute of the household booster pump according to the following regulations
a) The temperature of the test water should be kept at (20 + -3) ° c;
b) And (3) sealing a water outlet of the booster pump, starting the booster pump to apply pressure to a water inlet of the booster pump for water injection, boosting in a pressure gradient of 1bar until the volute of the booster pump is exploded, and recording the explosion pressure value, wherein the explosion pressure is not less than 9bar.
3. The embrittlement temperature of the volute material of a domestic booster pump was tested according to the following specifications
National standards of the people's republic of China: method for measuring GBT 5470-2008 plastic impact method embrittlement temperature
4. Conditions and dimensions of mechanical spline testing
The test for tensile strength used specimens with dimensions 172 x 10 x 4mm, at a tensile rate of 50mm/min;
the specimens used for the flexural strength test have a size of 80 × 10 × 4 and a bending rate of 2mm/min;
the flexural modulus test used bars of 80 x 10 x 4 size with a bending rate of 2mm/min;
notched izod impact strength used splines of 80 x 8 x 4.
If functional additives such as ultraviolet light absorbers, light stabilizers, antistatic agents, coloring agents and the like are added into the preparation components, the composite material with corresponding characteristics is also protected by the invention.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The polypropylene reinforced material for the volute of the household booster pump is characterized by comprising the following raw materials in parts by mass: 35-76 parts of injection molding grade homopolymerized polypropylene with the melting index of 13-17g/10min, 0-30 parts of block copolymerization polypropylene with the ethylene content of 18% and the melting index of 1-3g/10min, 20-30 parts of chopped glass fiber, 4-5 parts of compatilizer, 0.2-0.3 part of silane coupling agent, 0.1-0.2 part of antioxidant and 0.1-0.2 part of lubricant.
2. The polypropylene reinforced material for the volute of the household booster pump as claimed in claim 1, wherein the chopped glass fiber is alkali-free glass fiber with a diameter of 13 μm, a chopped length of 4mm and a water content of less than or equal to 3%.
3. The polypropylene reinforcing material for the volute of the domestic booster pump as claimed in claim 1, wherein the silane coupling agent is at least one of butadienyltriethoxysilane and bis- [ γ - (triethoxysilyl) propyl ] tetrasulfide.
4. The polypropylene reinforcing material for the volute of the household booster pump as claimed in claim 1, wherein the compatibilizer is polypropylene grafted maleic anhydride with a grafting ratio of 2%; the antioxidant is at least one of hindered phenols, thioesters and phosphite heat stabilizers.
5. The polypropylene reinforced material for the volute of the household booster pump as recited in claim 1, wherein the lubricant is at least one of polyethylene wax, stearate, ethylene bis-stearamide and grafted ethylene bis-stearamide.
6. The method for preparing polypropylene reinforced material for the volute of the household booster pump as claimed in any one of claims 1 to 5, wherein the method comprises the following steps:
s1, weighing various raw materials according to a mass ratio;
s2, mixing the weighed silane coupling agent with ethanol to prepare an ethanol solution of the silane coupling agent with the mass percentage concentration of 10%;
s3, drying the weighed chopped glass fibers, then stirring and refluxing the dried chopped glass fibers and a prepared ethanol solution of a silane coupling agent with the mass percentage concentration of 10% at a low speed, standing at room temperature, carrying out vacuum filtration, and drying in an electric heating constant temperature forced air drying box to constant weight to obtain surface-treated chopped glass fibers for later use;
s4, adding the weighed polypropylene, the compatilizer, the antioxidant and the lubricant into a mixer filled with nitrogen protection for high-speed mixing;
s5, after mixing, putting the mixed materials into a parallel double-screw extruder for melting, adding the chopped glass fibers after surface treatment from a side feeding port of the extruder, and extruding to obtain a primary material of the polypropylene reinforcing material for the household booster pump volute;
and S6, placing the preliminary material of the polypropylene reinforced material into a granulator for granulation, and finally preparing the polypropylene reinforced material for the household booster pump volute.
7. The method for preparing the polypropylene reinforcing material for the volute of the household booster pump as claimed in claim 6, wherein in the step S3, stirring and refluxing are controlled for 10-15 min, standing is carried out at room temperature for 11-13 h, and the temperature in the electrothermal constant-temperature air-blowing drying oven is 75-83 ℃.
8. The method for preparing polypropylene reinforced material for volute of domestic booster pump as claimed in claim 6, wherein the high speed mixing time of the control mixer in S4 is 2-10 min.
9. The method for preparing polypropylene reinforcing material for volute of domestic booster pump as claimed in claim 6, wherein in S5, barrel temperature of extruder is controlled at 205-210 deg.C, screw rotation speed is controlled at 400-600 r/min, and vacuum degree is controlled at-0.04-0.1 MPa.
10. A booster pump for domestic use, the volute of which is made of the polypropylene reinforcement material as defined in any one of claims 1 to 5.
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