CN115873369A - Modified polypropylene material for automotive interior and preparation method thereof - Google Patents
Modified polypropylene material for automotive interior and preparation method thereof Download PDFInfo
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- CN115873369A CN115873369A CN202211479771.4A CN202211479771A CN115873369A CN 115873369 A CN115873369 A CN 115873369A CN 202211479771 A CN202211479771 A CN 202211479771A CN 115873369 A CN115873369 A CN 115873369A
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Abstract
The invention discloses a polypropylene modified material for automotive interiors and a preparation method thereof, and aims to solve the problem that the polypropylene material in the prior art cannot overcome the defects of reduced impact strength and increased density while enhancing mechanical properties, and the polypropylene modified material comprises, by weight, 40 to 60 parts of polypropylene, 10 to 30 parts of modified nano-filler, 1 to 10 parts of chiral nano-silica fiber, 1 to 10 parts of grafting monomer, 1 to 10 parts of talcum powder and 3242 parts of auxiliary agent, namely 1~5. The invention ensures that the nano-filler is well dispersed and contacted in the polypropylene material, and the prepared polypropylene material improves the impact strength and reduces the increase of the density besides maintaining the advantages of good hardness, high modulus and low shrinkage rate.
Description
Technical Field
The invention relates to a modified polypropylene material for automotive interior and a preparation method thereof, belonging to the technical field of polypropylene material preparation.
Background
Polypropylene is one of four general plastic materials, which has excellent comprehensive properties, such as good chemical stability and processing and forming properties, and it is important that the polypropylene is relatively cheap and is applied in the fields of buildings, household electrical appliances, packaging, automobiles, etc.
With the acceleration of the industrial application process of polymer materials and composite materials, various industrial departments continuously raise higher requirements, such as higher tensile strength, modulus, thermal conductivity, heat distortion temperature, lower thermal expansibility, lower cost and the like, and pure resins are not satisfactory. Various non-metal and metal powder fillers are added into the pure resin, so that various performances of the plastic resin can be improved, and the plastic resin can reach the required technical indexes and high cost performance.
However, the addition of more fillers can also bring adverse effects, such as the increase of the density of the material, the reduction of the impact performance and the like, and the problem of the dispersibility of the nano-fillers cannot be solved well so far.
Therefore, if the nano material can be well dispersed and contacted in the polypropylene material, the advantages of the nano material are well exerted, the polypropylene material not only has the advantages of high hardness and modulus, low shrinkage rate and the like brought by common fillers, but also overcomes the defects of reduced impact strength and increased density, a novel polypropylene composite material for automotive interiors is obtained, and the application range of the polypropylene material is greatly expanded.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a modified polypropylene material for automotive interiors and a preparation method thereof, so that nano fillers are well dispersed and contacted in the polypropylene material, and the prepared polypropylene material has the advantages of good hardness, high modulus and low shrinkage rate, and also improves the impact strength and reduces the increase of density.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
on one hand, the invention provides a modified polypropylene material for automobile interior decoration, which comprises the following components in parts by weight,
40-60 parts of polypropylene resin
10 to 30 portions of modified nano filler
1 to 10 portions of chiral nano silicon dioxide fiber
1 to 10 portions of grafting monomer
1 to 10 portions of talcum powder
1-5 parts of an auxiliary agent;
the modified nano filler is organized silicate and other minerals with a layered structure;
the grafting monomer is one or more of maleic anhydride, glycidyl methacrylate, styrene, methyl methacrylate, butyl acrylate, acrylic acid and 4-vinylpyridine;
the auxiliary agent comprises a swelling agent, a deodorant, a silane coupling agent, an antioxidant, an initiator and a toughening agent.
Optionally, the organizing treatment is to organize the nanofiller by using long-chain organic amine, and the long-chain organic amine is octadecyl ammonium salt.
Optionally, the nanofiller comprises one or more of montmorillonite, hectorite, sepiolite, mica, kaolin, metal oxides and metal disulfides; the metal oxide comprises one or more of molybdenum oxide and vanadium oxide, and the metal disulfide comprises one or more of titanium disulfide and molybdenum disulfide.
Optionally, the auxiliary agent comprises the following components in parts by weight: 15-30 parts of swelling agent, 20-40 parts of silane coupling agent, 10-20 parts of antioxidant, 10-20 parts of toughening agent, 1-5 parts of deodorant and 1-5 parts of initiator.
Optionally, the swelling agent is benzoyl peroxide, and the silane coupling agent includes one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (β -methoxyethoxy) silane.
Optionally, the odor removing agent comprises zeolite and molecular sieve with the particle size range of 10-40 microns; the toughening agent is an ethylene-octene copolymer; the antioxidant is a mixture of hindered phenol antioxidant and phosphite antioxidant.
Optionally, the particle diameter range of the talcum powder is 2-8 microns.
On the other hand, the invention also provides a preparation method of the modified polypropylene material for the automotive interior, which comprises the following steps:
carrying out organic treatment on the nano filler by using long-chain organic amine;
adding a grafting monomer and a swelling agent into the nano filler for swelling;
adding the swelled nano filler, powdery and high-fluidity polypropylene and an initiator into a mixing roll for melt reaction to obtain a polypropylene/nano filler graft intercalation blend;
adding the polypropylene/nano filler graft intercalation blend, the chiral silica fiber, the talcum powder and various auxiliaries into an extruder for blending, melting and extruding to obtain the modified polypropylene material for the automotive interior.
Further, the time for the melt reaction in the mixer is at least 10min.
Further, the process control conditions of the extruder are that the first zone is 180-190 ℃, the second zone is 200-210 ℃, the third zone is 200-210 ℃, the fourth zone is 210-215 ℃, the fifth zone is 210-215 ℃, the sixth zone is 210-215 ℃, the seventh zone is 215-225 ℃, the eighth zone is 215-225 ℃, the ninth zone is 215-225 ℃, and the tenth zone is 215-225 ℃; the retention time is 1 to 2 minutes, and the pressure is 12 to 18MPa.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the nano-filler is organically treated and the shape and the fluidity of the used polypropylene are changed, so that the nano-filler is well dispersed and contacted in the polypropylene material, the advantages of the nano-filler are well exerted, the polypropylene material not only has the advantages of high hardness and modulus, low shrinkage rate and the like brought by common fillers, but also overcomes the defects of reduced impact strength and increased density, and the low-filling polypropylene composite material with high modulus and low shrinkage is obtained;
the invention also activates the talcum powder by adding the silane coupling agent, so that the surface of the talcum powder is organized, and the compatibility of the talcum powder and the polypropylene is improved, thereby improving the shock resistance of the polypropylene and improving the wear resistance of the polypropylene;
the spiral structure of the added chiral silica spiral fiber can be wound with the polypropylene substrate, so that the stability of the silica fiber in the polypropylene composite material can be improved, the appearance of an injection product of the composite material is improved, and the mechanical properties of the polypropylene composite material and the injection product thereof are improved.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value and should be understood to encompass values close to these ranges or values. For numerical ranges, each range between its endpoints and individual point values, and each individual point value can be combined with each other to give one or more new numerical ranges, and such numerical ranges should be construed as specifically disclosed herein.
For the purposes of the present specification and appended claims, unless otherwise indicated, all numbers expressing quantities, percentages or proportions, and other numerical values used in the specification and appended claims, are to be understood as being modified in all instances by the term "about". Moreover, all ranges disclosed herein are inclusive of the endpoints and independently combinable.
Example 1:
the embodiment provides a modified polypropylene material for automotive interior, which comprises, by weight, 40 parts of polypropylene, 25 parts of modified nano filler, 10 parts of chiral silica fiber, 10 parts of talcum powder, 10 parts of grafting monomer and 5 parts of auxiliary agent.
Example 2:
the embodiment provides a modified polypropylene material for automotive interiors, which comprises, by weight, 50 parts of polypropylene, 20 parts of modified nano filler, 5 parts of chiral silica fibers, 10 parts of talcum powder, 10 parts of grafting monomers and 5 parts of an auxiliary agent.
Example 3:
the embodiment provides a modified polypropylene material for automotive interior, which comprises, by weight, 60 parts of polypropylene, 20 parts of modified nano filler, 5 parts of chiral silica fiber, 5 parts of talcum powder, 5 parts of grafting monomer and 5 parts of auxiliary agent.
The modified nanofiller of examples 1-3 was montmorillonite and the grafting monomer was maleic anhydride.
The used auxiliary agents comprise swelling agents, smell removing agents, silane coupling agents, antioxidants, initiators, toughening agents and the like;
wherein, the swelling agent adopts benzoyl peroxide;
the silane coupling agent is a mixture of vinyl triethoxysilane, vinyl trimethoxysilane and vinyl tri (beta-methoxyethoxy) silane;
the smell removing agent comprises zeolite with the particle size range of 10-40 micrometers and a molecular sieve;
the toughening agent is an ethylene-octene copolymer;
the antioxidant is a mixture of hindered phenol antioxidant and phosphite antioxidant.
The modified polypropylene materials for automotive interiors provided in examples 1 to 3 were prepared by the following preparation method, which includes the steps of:
carrying out organic treatment on the nano filler by using long-chain organic amine, wherein the long-chain organic amine is octadecyl ammonium salt;
adding a grafting monomer and a swelling agent into the nano filler for swelling reaction;
adding the swelled nano filler, powdery and high-fluidity polypropylene and an initiator into a mixing roll for melt reaction to obtain a polypropylene/nano filler graft intercalation blend;
adding the polypropylene/nano filler graft intercalation blend, the chiral silica fiber, the talcum powder and various auxiliaries into an extruder, and carrying out blending, melting and extrusion to obtain the modified polypropylene material for automotive interior.
Comparative example 1:
the comparative example provides a special material for commercial polypropylene automotive interior.
Mechanical property tests were performed on examples 1 to 3 and comparative example 1, and the test results are shown in table 1.
Table 1: comparison of Performance test results of examples 1 to 3 and comparative example 1
Comparing the examples and the comparative examples, it can be seen that the modified polypropylene material for automobile interior provided by the present invention has better mechanical properties such as flexural strength, flexural modulus, tensile strength, etc., and better odor and heat distortion properties than the comparative examples, i.e., the polypropylene material for automobile interior is commercially available, but has a density comparable to that of the comparative examples, or even slightly better than that of the comparative examples.
The experimental data show that the polypropylene material provided by the invention not only has the advantages of high hardness and modulus, low shrinkage rate and the like brought by common fillers, but also overcomes the defects of reduced impact strength and increased density, so that the low-filled polypropylene composite material with high modulus and low shrinkage is obtained, can be well applied to the fields of automotive interior and the like, and greatly widens the application range of the polypropylene material.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A modified polypropylene material for automobile interior decoration is characterized in that: comprises the following components in parts by weight,
40 to 60 parts of polypropylene
10 to 30 parts of modified nano filler
1 to 10 parts of chiral nano silicon dioxide fiber
1 to 10 parts of grafting monomer
1 to 10 portions of talcum powder
5363 parts of an auxiliary agent 1~5;
the modified nano filler is organized silicate and other minerals with a layered structure;
the grafting monomer is one or more of maleic anhydride, glycidyl methacrylate, styrene, methyl methacrylate, butyl acrylate, acrylic acid and 4-vinylpyridine;
the auxiliary agent comprises a swelling agent, a deodorant, a silane coupling agent, an antioxidant, an initiator and a toughening agent.
2. The modified polypropylene material for automotive interior according to claim 1, wherein: the organic treatment is to adopt long-chain organic amine to organize the nanofiller, and the long-chain organic amine is octadecyl ammonium salt.
3. The modified polypropylene material for automotive interior according to claim 1, wherein: the nano filler comprises one or more of montmorillonite, hectorite, sepiolite, mica, kaolin, metal oxide and metal disulfide; the metal oxide comprises one or more of molybdenum oxide and vanadium oxide, and the metal disulfide comprises one or more of titanium disulfide and molybdenum disulfide.
4. The modified polypropylene material for automotive interior according to claim 1, wherein: the auxiliary agent comprises the following components in parts by weight: 15-30 parts of swelling agent, 20-40 parts of silane coupling agent, 10-20 parts of antioxidant, 10-20 parts of toughening agent, 1~5 parts of odor removing agent and 1~5 parts of initiator.
5. The modified polypropylene material for automotive interior according to claim 4, wherein: the swelling agent adopts benzoyl peroxide, and the silane coupling agent comprises one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (beta-methoxyethoxy) silane.
6. The modified polypropylene material for automotive interior according to claim 4, wherein: the smell removing agent comprises zeolite with the particle size range of 10 to 40 micrometers and a molecular sieve; the toughening agent is an ethylene-octene copolymer; the antioxidant is a mixture of hindered phenol antioxidant and phosphite antioxidant.
7. The modified polypropylene material for automotive interior according to claim 1, wherein: the particle size range of the talcum powder is 2~8 microns.
8. A method for preparing the modified polypropylene material for automobile interior decoration according to any one of claims 1~7, wherein: comprises the following steps of (a) carrying out,
carrying out organic treatment on the nano filler by using long-chain organic amine;
adding a grafting monomer and a swelling agent into the nano filler for swelling;
adding the swelled nano filler, powdery and high-fluidity polypropylene and an initiator into a mixing roll for melt reaction to obtain a polypropylene/nano filler graft intercalation blend;
adding the polypropylene/nano filler graft intercalation blend, the chiral silica fiber, the talcum powder and various auxiliaries into an extruder, and carrying out blending, melting and extrusion to obtain the modified polypropylene material for automotive interior.
9. The method for preparing the modified polypropylene material for automotive interiors according to claim 8, wherein: the time for the melt reaction in the mixer is at least 10min.
10. The method for preparing a modified polypropylene material for automotive interior according to claim 8, wherein: the process control conditions of the extruder are that a first zone is 180-190 ℃, a second zone is 200-210 ℃, a third zone is 200-210 ℃, a fourth zone is 210-215 ℃, a fifth zone is 210-215 ℃, a sixth zone is 210-215 ℃, a seventh zone is 215-225 ℃, an eighth zone is 215-225 ℃, a ninth zone is 215-225 ℃ and a tenth zone is 215-225 ℃; the residence time is 1~2 minutes, and the pressure is 12 to 18MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479771.4A CN115873369A (en) | 2022-11-24 | 2022-11-24 | Modified polypropylene material for automotive interior and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479771.4A CN115873369A (en) | 2022-11-24 | 2022-11-24 | Modified polypropylene material for automotive interior and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115873369A true CN115873369A (en) | 2023-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211479771.4A Pending CN115873369A (en) | 2022-11-24 | 2022-11-24 | Modified polypropylene material for automotive interior and preparation method thereof |
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| CN (1) | CN115873369A (en) |
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- 2022-11-24 CN CN202211479771.4A patent/CN115873369A/en active Pending
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