Antiaging glass fiber-reinforced polycarbonate composition and preparation method thereof

Abstract

The invention provides an antiaging glass fiber-reinforced polycarbonate composition, which comprises the following components in part by weight: 20 to 70 percent of polycarbonate resin, 10 to 35 percent of acrylonitrile-butadiene-phenylethylene polymer, 5 to 40 percent of polyethylene graft, 10 to 30 percent of glass fiber reinforce, 0.3 to 0.5 percent of coupling agent, 0.5 to 3 percent of lubricating agent and 0.1 to 1.0 percent of antioxygen. The polycarbonate composition of the invention is free from surface floating fibers has good glossiness, high mechanical performance, high size stability and high thermal resistance. The anti-boiling water aging performance of the polycarbonate composition is improved greatly. The polycarbonate composition can be widely used in electronic and electrical elements such as electrical tool shells, machine bodies, brackets, external gears, three-way valves, mechanical pump parts and the like and is particularly suitable to be used as engineering plastics for use in wet or hot water environments.

Description

technical field [0001] The invention relates to a modified polycarbonate composition, in particular to an aging-resistant glass fiber reinforced polycarbonate composition and a preparation method thereof, belonging to the field of high polymer modification. Background technique [0002] Polycarbonate (PC) is a tasteless, odorless, non-toxic thermoplastic engineering plastic, with outstanding impact resistance, creep resistance, high tensile strength, high heat resistance and cold resistance, medium It has excellent electrical properties, excellent shape and color stability, good light transmission, and the transmittance of visible light can reach about 90%. It is the only transparent product among the five major engineering plastics. [0003] However, due to the high rigidity of the molecular chain and the large steric hindrance of the bisphenol A PC, it has a high melt viscosity, so it is difficult to process and it is difficult to make large-scale products; it is prone to ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of glass fiber reinforced PC / ABS alloy is that the toughness of the material decreases, the floating fiber phenomenon is difficult to control, and the surface finish of the product is relatively low. At the same time, the aging resistance of PC / ABS alloy has not been solved, which limits the application of the material.

It is reported in the literature ("Plastic" NO.4, 1991, P11-14), due to the presence of PE in the PC / PE alloy, the diffusion coefficient of the water in the alloy is greatly reduced, so the molecular chain hydrolysis rate of PC decreases, and the PC / PE The alloy has good boiling water aging resistance, but the mechanical properties of PC / PE alloy are lower than those of PC and PC / ABS. At the same time, PC and PE are two polymers with poor compatibility, and the products are easy to delaminate.

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