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High-temperature-resistant non-discoloring polypropylene alloy material and preparation method thereof
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A technology of alloy materials and polypropylene, applied in the field of polymers, can solve problems such as limiting the range of filling and toughening PP
Active Publication Date: 2014-05-07
HEFEI GENIUS NEW MATERIALS
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Summary
Abstract
Description
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Problems solved by technology
[0004] Polypropylene (PP) modified by filling and toughening will change color when heated, which limits the scope of use of filled and toughened PP in high temperature and heat-resistant environments
At present, there have been many newspapers and magazines at home and abroad that have discussed in detail the thermal discoloration of some small molecular substances, but there are not many reports on the thermal discoloration of macromolecular polymers. As the temperature of the aqueous solution changes, the hydrophilic-hydrophobic properties of its molecular chains change, and the increase in temperature causes the molecular chains to shrink to spherical particles, and the state of the polymer in the solution undergoes a coil-pellet transition, resulting in a color change.
Method used
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Effect test
Embodiment 1
[0025] Weigh 50 parts of transparent PP, 10 parts of POE, 10 parts of talc, 0.05 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester antioxidant, 0.05 parts of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, in which PP, POE, and talc have the same refractive index. Mix in a high-speed mixer for 5 minutes, and extrude and granulate the uniformly mixed material in a twin-screw extruder. Extruder temperature setting: Zone Ⅰ 190°C, Zone Ⅱ 195°C, Zone Ⅲ 200°C, Zone Ⅳ 205°C, Zone Ⅴ 220°C, Zone Ⅵ 220°C, Zone Ⅶ 180°C, Zone Ⅷ 185°C, head 185 ℃, after the material is extruded, it is cooled, pelletized, and made into a sample strip from injection molding grade. It is placed at a constant temperature of 23°C for 16 hours and then tested. The performance test results are shown in Table 1.
[0026]
Embodiment 2
[0028] Weigh 65 parts of transparent PP, 20 parts of EPDM, 10 parts of calciumcarbonate, 0.15 parts of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester antioxidant, 0.15 parts of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, in which PP, POE, and talc have the same refractive index. Mix in a high-speed mixer for 5 minutes, and extrude and granulate the uniformly mixed material in a twin-screw extruder. Extruder temperature setting: Zone Ⅰ 190°C, Zone Ⅱ 195°C, Zone Ⅲ 200°C, Zone Ⅳ 205°C, Zone Ⅴ 220°C, Zone Ⅵ 220°C, Zone Ⅶ 180°C, Zone Ⅷ 185°C, head 185 ℃, after the material is extruded, it is cooled, pelletized, and made into a sample strip from injection molding grade. It is placed at a constant temperature of 23°C for 16 hours and then tested. The performance test results are shown in Table 1.
[0029]
Embodiment 3
[0031] Weigh 57 parts of transparent PP, 15 parts of POE, 15 parts of bariumsulfate, 0.1 part of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester antioxidant, 0.1 part of three (2.4-Di-tert-butylphenyl) phosphite antioxidant, in which PP, POE, and talc have the same refractive index. Mix in a high-speed mixer for 5 minutes, and extrude and granulate the uniformly mixed material in a twin-screw extruder. Extruder temperature setting: Zone Ⅰ 190°C, Zone Ⅱ 195°C, Zone Ⅲ 200°C, Zone Ⅳ 205°C, Zone Ⅴ 220°C, Zone Ⅵ 220°C, Zone Ⅶ 180°C, Zone Ⅷ 185°C, head 185 ℃, after the material is extruded, it is cooled, pelletized, and made into a sample strip from injection molding grade. It is placed at a constant temperature of 23°C for 16 hours and then tested. The performance test results are shown in Table 1.
[0032]
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Abstract
The invention relates to a high-temperature-resistant non-discoloring polypropylenealloy material which is prepared from 50-65 parts of polypropylene, 20-30 parts of modifier and 0.1-0.3 parts of antioxidant which are mixed, extruded and granulated, wherein the modifier is filler and a toughening agent, the polypropylene is transparent polypropylene, and the refractive index of the transparent polypropylene is equal to that of the modifier. According to the alloy material provided by the invention, the modifier with the numerical value of the refractive index equal to that of the transparent polypropylene is added, secondary crystallization of polypropylene probably occurs during temperature rise, so that the material has the high-temperature-resistant non-discoloring characteristic and can be widely applied to the field of medical apparatuses.
Description
[0001] technical field [0002] The invention relates to the technical field of polymers, in particular to a high-temperature-resistant and non-discoloring polypropylene alloy material and a preparation method thereof. [0003] Background technique [0004] Polypropylene (PP) modified by filling and toughening will change color when heated, which limits the scope of use of filled and toughened PP in high temperature and heat-resistant environments. At present, there have been many newspapers and magazines at home and abroad that have discussed in detail the thermal discoloration of some small molecular substances, but there are not many reports on the thermal discoloration of macromolecular polymers. As the temperature of the aqueous solution changes, the hydrophilic-hydrophobic properties of its molecular chains change, and the increase in temperature causes the molecular chains to shrink to spherical particles, and the state of the polymer in the solution undergoes a c...
Claims
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Application Information
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