Reinforced PC/PBT (Polycarbonate/Polybutylene Terephthalate) composite material and preparation method thereof
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A technology of composite materials and mixtures, which is applied in the field of reinforced PC/PBT composite materials and its preparation, can solve the problems of poor chemical corrosion resistance, poor mechanical properties, and low impact strength, and achieve good mechanical properties, good cost performance, and high toughness effect of size
Inactive Publication Date: 2012-06-13
SHENZHEN KEJU NEW MATERIAL
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Problems solved by technology
[0003] Polycarbonate (PC) is a thermoplastic containing carbonate in the main chain. It has excellent properties such as high transparency, high impact resistance, high strength, and high creep. However, it has poor chemical corrosion resistance, is soluble in organic solvents, and is easy to stress. Defects such as cracking
[0004] Traditional mineral fiber reinforced PC / PBT composite materials, due to the poor compatibility between mineral fiber and resin, there are incompatible components in the composite material system, the mechanical properties are poor, and the impact strength is very low
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Embodiment 1
[0043] Weigh raw materials by weight, 100 parts of polycarbonate, 25 parts of polybutylene terephthalate, 4 parts of toughening agent, 6 parts of compatibilizer, 30 parts of mineral fiber, 0.5 part of antioxidant, processing aid 1 dose.
[0044] Preparation:
[0045] Mix polycarbonate, polybutylene terephthalate, toughener, compatibilizer, antioxidant, and processing aid for 10 to 15 minutes;
[0046] The above-mentioned mixed raw materials are melted by a twin-screw extruder, and the mineral fiber is added from the side feeding port, extruded, and granulated; the process conditions of the twin-screw extruder are: the temperature of the first zone of the twin-screw extruder is 230 -240°C, the temperature in the second zone is 240-250°C, the temperature in the third zone is 250-260°C, the temperature in the fourth zone is 245-255°C, the temperature in the fifth zone is 240-250°C, the conveying time of the mixture in the screw is 1-5 minutes , the pressure is 10-20MPa.
Embodiment 2
[0048] Weigh raw materials by weight, 100 parts of polycarbonate, 30 parts of polybutylene terephthalate, 5 parts of toughening agent, 8 parts of compatibilizer, 35 parts of mineral fiber, 0.8 part of antioxidant, processing aid 1.5 parts.
[0049] The preparation method is the same as in Example 1.
Embodiment 3
[0051] Weigh raw materials by weight, 100 parts of polycarbonate, 35 parts of polybutylene terephthalate, 5 parts of toughening agent, 8 parts of compatibilizer, 40 parts of mineral fiber, 0.8 part of antioxidant, processing aid 1.5 parts.
[0052] The preparation method is the same as in Example 1.
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Abstract
The invention discloses a reinforced PC/PBT (Polycarbonate/Polybutylene Terephthalate) composite material and a preparation method thereof. The reinforced PC/PBT composite material is made from the following ingredients in parts by weight: 100 parts of PC, 25-40 parts of PBT, 4-6 parts of toughener, 6-10 parts of compatibilizer, 30-45 parts of mineral fiber, 0.5-1 part of antioxidant and 1-2 parts of processing aid, wherein the mineral fiber is a multi-mineral-filled mixture, the multi-mineral-filled mixture is formed by mixing a base material with an auxiliary material, the base material is made from silicate crystal whisker, needle-shaped silica powder and precipitated barium sulfate which have a weight ratio of 1: (0.5-0.6): (0.5-0.6), and the auxiliary material is a nano silica coupling agent or a nano silane coupling agent, and the auxiliary material is 0.5%-2% of the total weight of the base material. The reinforced PC/PBT composite material prepared by the preparation method disclosed by the invention has the advantages of excellent mechanical property, high rigidity, high toughness, easiness for spraying, chemical corrosion resistance and stable size and has excellent cost performance when the reinforced PC/PBT composite material is applied to products, such as bumpers of limousines, spoilers of automobiles and mud shields.
Description
[technical field] [0001] The invention relates to the field of polymer materials, in particular to a reinforced PC / PBT composite material and a preparation method thereof. [Background technique] [0002] Polybutylene terephthalate (PBT) is a crystalline linear saturated polyester resin. Its crystallization speed is fast, and it can be molded at high speed; it has excellent weather resistance, electrical properties, flame retardancy, chemical resistance, friction and wear properties, low water absorption, and high heat distortion temperature; excellent mechanical properties, high mechanical strength, fatigue resistance and It has good dimensional stability and low creep, and these properties rarely change under high temperature conditions. [0003] Polycarbonate (PC) is a thermoplastic containing carbonate in the main chain. It has excellent properties such as high transparency, high impact resistance, high strength, and high creep. However, it has poor chemical corrosion re...
Claims
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