Toughened cold-resistant transparent modified polypropylene material and preparation
A polypropylene material and homopolypropylene technology, applied in the field of modified polymer material polypropylene, can solve the problems of low transparency, poor impact strength, large difference in refractive index, etc.
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Embodiment 1
[0057] Weigh in proportion
[0058] Homopolypropylene: 85;
[0059] Alpha olefin / propylene copolymer: 15;
[0060] Sorbitol α nucleating agent: 0.15;
[0061] Substituted aromatic amide beta nucleating agent: 0.25;
[0062] Antioxidant 215: 0.3.
[0063] The first step, take polypropylene, toughening agent, nucleating agent, antioxidant by above-mentioned weight percentage;
[0064] The second step is to mix the above materials in a high-speed mixer at a speed of 600-900 rpm for 5-8 minutes;
[0065] The third step is to send the mixed raw materials into the twin-screw extruder through the intermediate silo. Under the high-speed shearing, mixing and conveying of the twin-screws, the materials can be fully melted and compounded. The length-to-diameter ratio of the extrusion equipment is 36:1, and it is equipped with precise temperature control and vacuum exhaust equipment. The screw speed is 400-600 rpm, and the working temperature of the twin-screw extrusion is 140-160°C in...
Embodiment 2
[0071] Weigh in proportion
[0072] Homopolypropylene: 75;
[0073] Ethylene octene copolymer: 25;
[0074] Sorbitol α nucleating agent: 0.2;
[0075] Substituted benzamide β-nucleating agent: 0.12;
[0076] Rare earth complex β-nucleating agent: 0.08;
[0077] Antioxidant 1010: 0.3.
[0078] Then the material was mixed at a high speed by a high-speed mixer, mixed and granulated by a twin-screw extruder, and the obtained granules were injection molded into products, and then their properties were tested. The results are shown in Table 2:
[0079] Table 2: The finished product test result of embodiment 2 gained
[0080] Test items unit experiment method test result Flexural modulus of elasticity 23°C MPa GB / T9341-2000 1231 Charpy notched impact strength
Embodiment 3
[0082] Weigh in proportion
[0083] Homopolypropylene: 65;
[0084] Metallocene polypropylene: 35;
[0085] Sorbitol α nucleating agent: 0.25;
[0086] Aromatic amine β-nucleating agent: 0.15;
[0087] Rare earth complex β-nucleating agent: 0.05;
[0088] Antioxidant 168: 0.3.
[0089] Then the material was mixed at a high speed by a high-speed mixer, mixed and granulated by a twin-screw extruder, and the obtained granules were injection molded into products, and then their properties were tested. The results are shown in Table 3:
[0090] Table 3: The finished product test result of embodiment 3 gained
[0091] Test items unit experiment method test result Flexural modulus of elasticity 23°C MPa GB / T9341-2000 1080 Charpy notched impact strength
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