CN106751353A - A kind of low-density that can be used for thin-walled property moulding, high-performance polypropylene compound material and preparation method thereof - Google Patents
A kind of low-density that can be used for thin-walled property moulding, high-performance polypropylene compound material and preparation method thereof Download PDFInfo
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- CN106751353A CN106751353A CN201611217073.1A CN201611217073A CN106751353A CN 106751353 A CN106751353 A CN 106751353A CN 201611217073 A CN201611217073 A CN 201611217073A CN 106751353 A CN106751353 A CN 106751353A
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- -1 polypropylene Polymers 0.000 title claims abstract description 57
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 56
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 150000001875 compounds Chemical class 0.000 title abstract 3
- 238000000465 moulding Methods 0.000 title abstract 2
- 239000002131 composite material Substances 0.000 claims abstract description 28
- 239000012745 toughening agent Substances 0.000 claims abstract description 17
- 239000011256 inorganic filler Substances 0.000 claims abstract description 14
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 3
- 238000001746 injection moulding Methods 0.000 claims description 25
- 229920001971 elastomer Polymers 0.000 claims description 21
- 239000000806 elastomer Substances 0.000 claims description 21
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 15
- 238000007580 dry-mixing Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 11
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 10
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 229920001577 copolymer Polymers 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 2
- 230000000845 anti-microbial effect Effects 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000004611 light stabiliser Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000002667 nucleating agent Substances 0.000 claims description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical group OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 229910000077 silane Inorganic materials 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 150000007970 thio esters Chemical class 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 11
- 239000007924 injection Substances 0.000 claims 11
- 230000008569 process Effects 0.000 abstract description 3
- 208000020442 loss of weight Diseases 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 10
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 238000011056 performance test Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- VKJLYEDTHCTCOH-UHFFFAOYSA-N 3-(3-octadecoxy-3-oxopropyl)sulfanylpropanoic acid Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(O)=O VKJLYEDTHCTCOH-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing 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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of low-density that can be used for thin-walled property moulding, high-performance polypropylene compound material and preparation method thereof, wherein PP composite material is made up of following raw materials by weight：Polypropylene 44 84%, high-performance inorganic filler 10 20%, elastic body toughening agent 5 25%, compatilizer 0 3%, stabilizer 0.1 2%, other additives 0 5%.Optimal proportion and synergy that the present invention passes through high-flowability polypropylene, high-performance inorganic filler, elastic body toughening agent and compatilizer, have obtained high fluidity, high rigidity, have had rigidity-toughness balanced concurrently, while the lower high-performance polypropylene compound material of density.By the process that high-performance inorganic filler is added from side spout, the more preferable PP composite material of comprehensive mechanical performance is obtained.Compared with the PP composite material of existing high fluidity high rigidity, material of the invention except mechanical performance quite in addition to, also with lower density, be highly suitable for meet on the basis of existing thin-walled parts continue loss of weight demand.
Description
Technical Field
The invention relates to a polypropylene composite material, in particular to a low-density and high-performance polypropylene composite material which can be used for thin-walled injection molding parts and a preparation method thereof; belongs to the field of polymer modification and processing.
Background
With the rapid development of the automobile industry and the increasing severity of energy problems, the light weight of the whole automobile becomes an important subject of intensive research in each automobile factory. In the plastic for vehicle, the most used polypropylene materials are mainly made of the following lightweight schemes: low density, thin wall, physical and chemical foaming, and direct replacement of metal. With the progress of lightweight research, the existing weight reduction scheme is increasingly difficult to meet the requirements, and further optimization is needed on the existing lightweight technology.
At present, the traditional wall thickness of plastic parts for mainstream vehicles is generally 2.5-3.0mm, the wall thickness of the thin-walled parts is gradually reduced to 1.8-2.2mm, and the application of low-density materials can reduce the weight of the parts by 5-10%. If the two methods are combined to reduce the material density as much as possible while thinning the wall, the weight reduction effect is more obvious. However, the material used for the thin-walled part has high rigidity, and the performance such as flexural modulus and the like is reduced by simple density reduction, so that the requirements such as the bearing of the part are difficult to meet even though the weight is reduced, and the criterion that the weight reduction of the whole vehicle cannot be achieved at the cost of performance sacrifice is violated.
In order to solve the problems, the invention searches out the optimal component proportion by the synergistic action of the high-performance inorganic filler, the elastomer toughening agent and the compatilizer, and uses a lateral feeding process to obtain the high-performance polypropylene composite material which has high fluidity, high rigidity and rigidity-toughness balance and lower density, and can directly replace the material used by the existing thin-walled part to realize the purpose of further reducing weight.
Disclosure of Invention
The invention aims to develop a low-density and high-performance polypropylene composite material for thin-walled injection molding parts, which is used for injection molding of thin-walled parts in the automobile or household appliance industry.
Another object of the present invention is to provide a method for preparing such a polypropylene composite.
The purpose of the invention can be realized by the following technical scheme:
a low-density and high-performance polypropylene composite material for thin-walled injection molding parts comprises the following raw materials in percentage by weight:
wherein,
the polypropylene is homopolymerized or copolymerized propylene with the melt flow rate of 30-100g/10min, and the test condition is 230 ℃ and 2.16 kg; wherein the comonomer of the copolymerized propylene is ethylene, and the content of the comonomer is 4-10 mol%.
The high-performance inorganic filler is one or a composition of more than two of talcum powder, mica, whiskers, wollastonite and glass fiber, and the talcum powder with the average diameter of 1um is preferred.
The elastomer toughening agent is one or a composition of more than two of polybutadiene rubber, ethylene-propylene-diene rubber (EPDM), ethylene-octene copolymer, ethylene-butene copolymer and the like, preferably ethylene-octene copolymer elastomer, and the melt flow rate is 0.5-10g/10 min; the test conditions were 230 ℃ and 2.16 kg.
The compatilizer is one or the combination of more than two of grafted polypropylene, grafted polyethylene, grafted polystyrene, grafted ABS and grafted POE, the grafting group is one or the combination of more than two of maleic anhydride, silane, acrylic acid and polyacrylamide, preferably maleic anhydride grafted polypropylene, and the density is 0.89-0.91g/cm3The melting point is 170-190 ℃, the melt flow rate is 10-50g/10min and the grafting rate is 0.5-1.0 percent under the test condition of 230 ℃ × 2.16.16 kg, and the polypropylene is obtained by melt extrusion modification of random homopolymerized or block copolymerized propylene by maleic anhydride.
The stabilizer is a primary antioxidant and a secondary antioxidant which are considered to be needed by a person skilled in the art, wherein the primary antioxidant is a hindered phenol or thioester antioxidant, and the secondary antioxidant is a phosphite or ester antioxidant.
The other additives include one or more of colorants, nucleating agents, blowing agents, surfactants, plasticizers, coupling agents, flame retardants, light stabilizers, processing aids, antistatic aids, antimicrobial aids, lubricants, combinations thereof, as deemed desirable by one skilled in the art.
The preparation method of the low-density and high-performance polypropylene composite material for the thin-walled injection molding part comprises the following steps:
1) weighing the raw materials according to the weight ratio;
2) dry-mixing polypropylene, high-performance inorganic filler, elastomer toughening agent, compatilizer, stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes, adding the mixed raw materials into a double-screw extruder, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
3) Another preferred method is: dry-mixing polypropylene, an elastomer toughening agent, a compatilizer, a stabilizer and other auxiliary agents in a high-speed mixer for 3-15 minutes to prepare a mixture A, adding the mixture A into a double-screw extruder from a main screw feeding port, adding a high-performance inorganic filler into the double-screw extruder from the middle side of a screw to a feeding port, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
The invention has the advantages that:
1. the high-performance polypropylene composite material with high fluidity, high rigidity, rigidity and toughness balance and lower density is obtained through the optimal proportion and synergistic effect of the high-fluidity polypropylene, the high-performance inorganic filler, the elastomer toughening agent and the compatilizer.
2. The polypropylene composite material with better comprehensive mechanical property is obtained by a process method of adding the high-performance inorganic filler from a side feeding port.
3. Compared with the existing polypropylene composite material with high fluidity and high rigidity, the material disclosed by the invention has the advantages of equivalent mechanical properties and lower density, and is very suitable for meeting the requirement of continuously reducing weight on the basis of the existing thin-wall part.
Detailed Description
The present invention will be described in further detail with reference to examples. The scope of the invention is not limited by these examples, which are set forth in the following claims.
In the composite formulations of the examples and comparative examples, the high flow polypropylene used was block copolymerized propylene having a melt flow rate (230 ℃ C.. times.2.16 kg) of 30 to 80/10min, and the conventional polypropylene used was block copolymerized propylene having a melt flow rate (230 ℃ C.. times.2.16 kg) of 5 to 30/10min, wherein the comonomer of the block copolymerized propylene was ethylene and the content thereof was in the range of 4 to 10 mol%.
The high-performance inorganic filler is talcum powder with the average diameter of 1 um.
The elastomer used was ethylene-octene copolymer 8150 from DOW.
The compatilizer is self-made maleic anhydride grafted polypropylene, the grafting rate is 0.5 percent, and the compatilizer is obtained by melt extrusion modification of random homopolymerized or block copolymerized propylene by maleic anhydride.
The stabilizers used were Negonox DSTP (chemical name stearyl thiodipropionate) from ICE, British, Irganox1010 (chemical name pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]) from Ciba, and Igrafos168 (chemical name tris (2, 4-di-tert-butylphenyl) phosphite) from Ciba.
Example 1
Weighing 74.5 percent of high-fluidity polypropylene, 10 percent of talcum powder, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 2
Weighing 69.5% of high-fluidity polypropylene, 15% of talcum powder, 15% of elastomer, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 3
Weighing 63.5% of high-fluidity polypropylene, 15% of talcum powder, 20% of elastomer toughening agent, 1% of compatilizer, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 4
Weighing 58.5% of high-fluidity polypropylene, 20% of talcum powder, 20% of elastomer toughening agent, 1% of compatilizer, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 5
Weighing 79.5 percent of high-fluidity polypropylene, 15 percent of talcum powder, 5 percent of elastomer, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 6
Weighing 59.5 percent of high-fluidity polypropylene, 15 percent of talcum powder, 25 percent of elastomer, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 7
Weighing 63.5% of high-fluidity polypropylene, 20% of elastomer toughening agent, 1% of compatilizer, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of Negonox DSTP according to weight percentage, and dry-mixing for 5 minutes in a high-speed mixer to prepare a mixture A; respectively adding the mixture A into a double-screw extruder from a main screw feeding port and 15 percent of talcum powder from a lateral feeding port in the middle of the screw for melt extrusion granulation; wherein the temperature in the screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Comparative example 1
Weighing 64.5 percent of common polypropylene, 20 percent of talcum powder, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of Negonox DSTP according to weight percentage, dry mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Comparative example 2
Weighing 64.5 percent of high-fluidity polypropylene, 20 percent of talcum powder, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of Negonox DSTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Performance evaluation method:
the sample density test is carried out according to the ISO1183-1 standard; the bending performance test is carried out according to ISO178 standard, the size of a test sample is 80 multiplied by 10 multiplied by 4mm, the span is 64mm, and the bending speed is 2 mm/min; the impact performance test of the simply supported beam is carried out according to the ISO179-1 standard, the size of a sample is 80 multiplied by 10 multiplied by 4mm, and the depth of a notch is one third of the thickness of the sample; the melt flow rate was determined according to ISO1133-1, test conditions 230 ℃ X2.16 kg.
The formulations and performance test results for the examples and comparative examples are shown in the following tables:
TABLE 1 Material formulations (wt.%) for examples 1-7 and comparative examples 1-2
TABLE 2 results of Performance test of examples 1-7 and comparative examples 1-2
Comparative example 1 is a traditional toughened and reinforced polypropylene material, with relatively common fluidity and rigidity; comparative example 2 is a polypropylene composite material useful for thinning, the fluidity and rigidity are significantly higher than those of conventional materials; examples 1-2 had a different reduction in material density but a greater difference in stiffness than comparative example 2; the performance of example 4 is better than that of comparative example 2, but the density is not reduced, and the weight reduction advantage is not generated; example 5 has lower toughness and example 6 has lower rigidity, and only example 3 has approximately equivalent performances in comparison with comparative example 2 while the density is reduced, but the flexural modulus is still slightly lower; example 7 the same proportion as example 3 is adopted, the side feeding is added with talcum powder, the obtained product has the same performance as comparative example 2, the density is reduced by 4%, and the product can directly replace the thin-wall product applied in comparative example 2, thereby achieving the effect of further reducing weight.
Claims (12)
1. A low-density and high-performance polypropylene composite material for thin-walled injection molding parts is characterized in that: the material consists of the following raw materials in percentage by weight:
2. a low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the polypropylene is homopolymerized or copolymerized propylene with the melt flow rate of 30-100g/10min, and the test condition is 230 ℃ and 2.16 kg; wherein the comonomer of the copolymerized propylene is ethylene, and the content of the comonomer is 4-10 mol%.
3. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the high-performance inorganic filler is one or a composition of more than two of talcum powder, mica, whisker, wollastonite and glass fiber.
4. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 3 wherein: the high-performance inorganic filler is talcum powder with the average diameter of 1 um.
5. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the elastomer toughening agent is one or a composition of more than two of polybutadiene rubber, ethylene-propylene-diene rubber (EPDM), ethylene-octene copolymer, ethylene-butene copolymer and the like.
6. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 5 wherein: the elastomer toughening agent is an ethylene-octene copolymer elastomer, and the melt flow rate is 0.5-10g/10 min; the test conditions were 230 ℃ and 2.16 kg.
7. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the compatilizer is one or the combination of more than two of grafted polypropylene, grafted polyethylene, grafted polystyrene, grafted ABS and grafted POE, and the grafting group is one or the combination of more than two of maleic anhydride, silane, acrylic acid and polyacrylamide.
8. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 7 wherein: the compatilizer is maleic anhydride grafted polypropylene, and the density is 0.89-0.91g/cm3The melting point is 170-190 ℃, the melt flow rate is 10-50g/10min and the grafting rate is 0.5-1.0 percent under the test condition of 230 ℃ × 2.16.16 kg, and the polypropylene is obtained by melt extrusion modification of random homopolymerized or block copolymerized propylene by maleic anhydride.
9. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the stabilizer is a primary antioxidant and a secondary antioxidant which are considered to be needed by a person skilled in the art, wherein the primary antioxidant is a hindered phenol or thioester antioxidant, and the secondary antioxidant is a phosphite or ester antioxidant.
10. A low density, high performance polypropylene composite useful for thin walled injection molded parts according to claim 1 wherein: the other additives include one or more of colorants, nucleating agents, blowing agents, surfactants, plasticizers, coupling agents, flame retardants, light stabilizers, processing aids, antistatic aids, antimicrobial aids, lubricants, combinations thereof, as deemed desirable by one skilled in the art.
11. A method of producing a low density, high performance polypropylene composite useful for thin walled injection molded parts according to any one of claims 1 to 10 wherein: the method comprises the following steps:
1)
2) dry-mixing polypropylene, high-performance inorganic filler, elastomer toughening agent, compatilizer, stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes, adding the mixed raw materials into a double-screw extruder, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
12. A method of producing a low density, high performance polypropylene composite useful for thin walled injection molded parts according to any one of claims 1 to 10 wherein: the method comprises the following steps:
(1) weighing the raw materials according to the weight ratio;
(2) dry-mixing polypropylene, an elastomer toughening agent, a compatilizer, a stabilizer and other auxiliary agents in a high-speed mixer for 3-15 minutes to prepare a mixture A, adding the mixture A into a double-screw extruder from a main screw feeding port, adding a high-performance inorganic filler into the double-screw extruder from the middle side of a screw to a feeding port, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
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