CN111748157B - High-transparency modified polyolefin material and preparation method thereof - Google Patents
High-transparency modified polyolefin material and preparation method thereof Download PDFInfo
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- CN111748157B CN111748157B CN201910244948.4A CN201910244948A CN111748157B CN 111748157 B CN111748157 B CN 111748157B CN 201910244948 A CN201910244948 A CN 201910244948A CN 111748157 B CN111748157 B CN 111748157B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a high-transparency modified polyolefin material and a preparation method thereof, wherein the high-transparency modified polyolefin material is prepared from 65-85 parts of poly-4-methyl-1-pentene, 7-15 parts of polyisobutylene, 3-10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent, 0.2 part of butylated hydroxytoluene, 5-10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersing agent. According to the high-transparency modified polyolefin material provided by the invention, the crystalline material poly (4-methyl-1-pentene) with excellent light transmission effect is selected as the base material, so that the dimensional stability of the material at a higher temperature is ensured; the high molecular weight polyisobutylene and the micro-crosslinked low molecular weight ethylene propylene diene monomer are used as the toughening agent, and the basic magnesium carbonate with special light refractive index is used as the filling material, so that the toughness and the rigidity of the material are improved, and the influence on the integral transparency of the material is avoided to the greatest extent.
Description
Technical Field
The invention relates to the technical field of modified plastics, in particular to a high-transparency modified polyolefin material and a preparation method thereof.
Background
The transparent material is a material with excellent optical transmittance, and is mainly applied to industries with strict requirements on visual effects, such as automobiles, electronic appliances, medical fields and the like. At present, common glass materials are most widely used, but with the continuous development of the field of polymer materials, many polymer materials with excellent characteristics and more convenient processing and forming are developed and are widely used to replace common inorganic glass. Such as Polymethylmethacrylate (PMMA), Polystyrene (PS), Polycarbonate (PC), and the like. Compared with inorganic glass, transparent polymers are obviously lighter in weight, higher in toughness and lower in price, and meanwhile, parts with complex structures can be rapidly prepared by using an injection molding method.
However, the above materials have many problems, and the transparent polymer materials on the market are usually amorphous materials, which have high stability to high temperature and are liable to creep, resulting in unstable product structure. Meanwhile, the material has poor aging resistance, and is easy to change color, thereby affecting the visual effect.
Disclosure of Invention
The invention aims to provide a high-transparency modified polyolefin material and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the high-transparency modified polyolefin material is prepared from the following raw material components in percentage by mass:
in a further aspect, the poly-4-methyl-1-pentene has a heat distortion temperature in excess of 110 ℃ at 0.45 MPa.
The polyisobutylene is high molecular weight polyisobutylene with a number average molecular weight of 200000.
The ethylene propylene rubber is low molecular weight ethylene propylene diene monomer, and the Mooney viscosity of the ethylene propylene rubber is 25 at 125 ℃.
The vulcanizing agent is a peroxide vulcanizing agent.
The antioxidant is at least three of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) N-octadecyl propionate (1076), tris- (2, 4-di-tert-butylphenyl) phosphite (168), N-phenyl-N-cyclohexyl p-phenylenediamine (4010), and dioctadecyl thiodipropionate (DSTDP) in a mass ratio of 1: 1: 1.
The dispersant includes but is not limited to sodium lauryl sulfate, methyl amyl alcohol, guar gum, stearamide dispersants.
Another object of the present invention is to provide a method for preparing the above high-transparency modified polyolefin material, comprising the steps of: adding 65-85 parts of poly-4-methyl-1-pentene, 5-10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 3-5min, adding 7-15 parts of polyisobutylene, 3-10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 1-3min, and then slicing or carrying out die bracing granulation; wherein the processing temperature of the internal mixer is 240-260 ℃, the pressure of the upper ram is 0.55MPa, and the rotating speed of the screw of the internal mixer is 30-50 r/min.
Compared with the prior art, the invention has the following advantages:
according to the high-transparency modified polyolefin material provided by the invention, the crystalline material poly (4-methyl-1-pentene) with excellent light transmission effect is selected as the base material, so that the dimensional stability of the material at a higher temperature is ensured; the high molecular weight polyisobutylene and the micro-crosslinked low molecular weight ethylene propylene diene monomer are used as the toughening agent, and the basic magnesium carbonate with special light refractive index is used as the filling material, so that the toughness and the rigidity of the material are improved, and the influence on the integral transparency of the material is avoided to the greatest extent.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The poly-4-methyl-1-pentene described in the examples is a commercially available product having a heat distortion temperature (0.45MPa) exceeding 110 ℃;
the polyisobutenes described in the examples are high molecular weight polyisobutenes having a number average molecular weight of: 200000;
the ethylene-propylene rubber described in the examples is a low molecular weight ethylene-propylene-diene monomer rubber having a Mooney viscosity of 25 at 125 ℃;
the curing agent in the examples is a commercially available peroxide curing agent;
in the embodiment, the antioxidant is at least three of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) N-octadecyl propionate (1076), tris- (2, 4-di-tert-butylphenyl) phosphite (168), N-phenyl-N-cyclohexyl p-phenylenediamine (4010), and dioctadecyl thiodipropionate (DSTDP) in a mass ratio of 1: 1: 1, mixing;
the dispersant described in the examples is a commercially available organic dispersant, the ingredients of which include, but are not limited to, sodium lauryl sulfate, methyl amyl alcohol, or a stearate amide dispersant.
Example 1
Adding 65 parts of poly-4-methyl-1-pentene, 10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 5min, adding 15 parts of polyisobutylene, 10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 3min, and then slicing or carrying out bracing granulation through a mouth mold; wherein the processing temperature of the internal mixer is 260 ℃, the pressure of the upper weight is 0.55MPa, and the screw rotating speed of the internal mixer is 50 r/min. The product properties are shown in Table 1.
Example 2
Adding 75 parts of poly-4-methyl-1-pentene, 7 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 4min, adding 10 parts of polyisobutylene, 8 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 2min, and then slicing or carrying out die bracing granulation; wherein the processing temperature of the internal mixer is 250 ℃, the pressure of the upper weight is 0.55MPa, and the screw rotating speed of the internal mixer is 40 r/min. The product properties are shown in Table 1.
Example 3
Adding 85 parts of poly-4-methyl-1-pentene, 5 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 3min, adding 7 parts of polyisobutylene, 3 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 1min, and then slicing or carrying out bracing granulation through a mouth mold; wherein the processing temperature of the internal mixer is 240 ℃, the upper pressure is 0.55MPa, and the screw rotating speed of the internal mixer is 30 r/min. The product properties are shown in Table 1.
TABLE 1
| Test item/Unit | Test standard | Example 1 | Example 2 | Example 3 |
| Density/g/cm3 | ISO 1183 | 0.893 | 0.861 | 0.840 |
| Vicat softening temperature/. degree C | ISO 306 | 177 | 172 | 164 |
| Notched Izod impact Strength/kJ/m2 | ISO 180 | 28.4 | 22.1 | 17.9 |
| Transmittance (a) | GB/T 2410 | 91 | 92 | 92 |
Comparative example 1
Adding 65 parts of poly-4-methyl-1-pentene, 10 parts of talcum powder, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 5min, adding 15 parts of polyisobutylene, 10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 3min, and then slicing or carrying out bracing granulation through a mouth mold; wherein the processing temperature of the internal mixer is 260 ℃, the pressure of the upper weight is 0.55MPa, and the screw rotating speed of the internal mixer is 50 r/min. The product properties are shown in Table 2.
Comparative example 2
Adding 65 parts of polymethyl methacrylate, 10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 5min, adding 15 parts of polyisobutylene, 10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 3min, and then slicing or carrying out bracing granulation through a mouth mold; wherein the processing temperature of the internal mixer is 260 ℃, the pressure of the upper press is 0.55MPa, and the screw rotating speed of the internal mixer is 50 r/min. The product properties are shown in Table 2.
Comparative example 3
Adding 90 parts of poly-4-methyl-1-pentene, 10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, mixing uniformly for 8min, and then slicing or drawing into strips through a mouth mold and granulating; wherein the processing temperature of the internal mixer is 260 ℃, the pressure of the upper weight is 0.55MPa, and the screw rotating speed of the internal mixer is 50 r/min. The product properties are shown in Table 2.
TABLE 2
As can be seen from examples 1 to 3 and comparative examples 1 to 3, the finally obtained modified polyolefin material has good light transmittance and high temperature resistance, good toughness, lighter weight and more excellent performance compared with the conventional transparent polymer. Meanwhile, as can be seen from comparative example 1, the special inorganic filler basic magnesium carbonate is adopted, so that the light transmittance of the material is not influenced by the inorganic filler.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications can be made in the embodiments and that the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.
Claims (6)
1. A high-transparency modified polyolefin material is characterized in that: the material is prepared from the following raw materials in percentage by mass:
65-85 parts of poly (4-methyl-1-pentene)
7-15 parts of polyisobutene
3-10 parts of ethylene propylene rubber
0.1 part of vulcanizing agent
Butylated hydroxytoluene 0.2 part
5-10 parts of basic magnesium carbonate
0.5 part of antioxidant
0.2 part of a dispersant, namely,
the polyisobutylene is high molecular weight polyisobutylene with the number average molecular weight of 200000;
the ethylene propylene rubber is low molecular weight ethylene propylene diene monomer, and the Mooney viscosity of the ethylene propylene rubber is 25 at 125 ℃.
2. The high transparency modified polyolefin material according to claim 1, characterized in that: the heat distortion temperature of the poly-4-methyl-1-pentene is more than 110 ℃ under the condition of 0.45 MPa.
3. The high transparency modified polyolefin material according to claim 1, characterized in that: the vulcanizing agent is a peroxide vulcanizing agent.
4. The high transparency modified polyolefin material according to claim 1, characterized in that: the antioxidant is at least three of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) N-octadecyl propionate, tris- (2, 4-di-tert-butylphenyl) phosphite, N-phenyl-N-cyclohexyl-p-phenylenediamine and dioctadecyl thiodipropionate in a mass ratio of 1: 1: 1 by mixing.
5. The high transparency modified polyolefin material according to claim 1, characterized in that: the dispersing agent is selected from sodium dodecyl sulfate, methyl amyl alcohol, Guel gum and stearic amide dispersing agent.
6. The process for producing a highly transparent modified polyolefin material according to any one of claims 1 to 5, wherein: the method comprises the following steps:
adding 65-85 parts of poly-4-methyl-1-pentene, 5-10 parts of basic magnesium carbonate, 0.5 part of antioxidant and 0.2 part of dispersant into a vacuum internal mixer, uniformly mixing for 3-5min, adding 7-15 parts of polyisobutylene, 3-10 parts of ethylene propylene rubber, 0.1 part of vulcanizing agent and 0.2 part of butylated hydroxytoluene, continuously mixing for 1-3min, and then slicing or carrying out die bracing granulation;
wherein the processing temperature of the internal mixer is 240-260 ℃, the pressure of the upper ram is 0.55MPa, and the rotating speed of the screw of the internal mixer is 30-50 r/min.
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