Polycarbonate and polyketone alloy and preparation method thereof

Abstract

The invention discloses a polycarbonate and polyketone alloy and a preparation method thereof. The polycarbonate and polyketone alloy is prepared from the following ingredients in parts by weight: 60 to 95 parts of polycarbonate, 5 to 40 parts of polyketone, 0.2 to 10 parts of maleic anhydride graft modification polyolefin elastomers, 0 to 10 parts of methyl methacrylate-butadiene-styrene terpolymers, 0.2 to 3 parts of antioxidants and 0.2 to 3 parts of processing agents. The alloy material has the advantages that the defect of poor solvent-resistant performance of the polycarbonate is effectively overcome; and meanwhile, the alloy material has good heat-resistant performance and mechanical property. The polycarbonate, the polyketone, the maleic anhydride graft modification polyolefin elastomers, the methyl methacrylate-butadiene-styrene terpolymers, the antioxidants and the processing agent are fed and are uniformly mixed; the mixture is fed into a double-screw extruder; and a product is obtained through melt extrusion granulation. The production can be performed by using the existing production equipment; the operation is simple; and the industrial production is easy.

Description

technical field [0001] The invention relates to the technical field of polycarbonate composite materials, in particular to a polycarbonate polyketone alloy with excellent heat resistance and chemical resistance and a preparation method thereof. Background technique [0002] Polycarbonate (referred to as PC) is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. Among them, the low mechanical properties of aliphatic and aliphatic-aromatic polycarbonates limit their application in engineering plastics. At present, only aromatic polycarbonate has been produced industrially. Aromatic polycarbonate has excellent impact strength, thermal stability, gloss, antibacterial properties, flame retardant properties and anti-pollution properties. However, due to the rigidity of the molecular chain and the large steric hindrance, its fluid...

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Problems solved by technology

However, due to the rigidity of the molecular chain and the large steric hindrance, its fluidity is poor, the melt viscosity is high, the melting temperature is high (270--320°C), it is not easy to process, it is difficult to make large thin-walled products, and the products are processed during the molding process. The residual stress in the medium is relatively large, and it is prone to stress cracking when it is stressed or exposed to solvents. At the same time, although PC is stable to acidic and oily media, it is not resistant to alkali. These defects limit its application range.

In order to solve these defects, PC is usually alloyed with ABS (acrylonitrile-butadiene-styrene copolymer) or PBT (polybutylene terephthalate), although these defects are solved, but the alloy The heat resistance of the material has dropped significantly, which is much worse than that of PC

[0003] Polyketone (POK) is a new type of green polymer engineering material synthesized by carbon monoxide, ethylene, and propylene in a solvent under the catalysis of a catalyst. This engineering plastic has the following characteristics: In a wide temperature range, it exhibits Excellent impact strength, high heat distortion temperature, excellent chemical resistance and hydrolysis resistance, excellent fuel resistance, excellent flame retardancy and high barrier properties, etc. Although polyketone is stronger than nylon and PBT in these aspects, but The rigidity of polyketone is much worse than them (flexural modulus: polyketone 1800MPa

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