PC/PBT composite material and preparation method and application thereof

Abstract

The invention provides a PC/PBT composite material as well as a preparation method and application thereof, and relates to the technical field of engineering plastics. The PC/PBT composite material provided by the invention is prepared from the following components in parts by weight: 50 to 80 parts of polycarbonate, 20 to 50 parts of polybutylene terephthalate, 0.5 to 4 parts of initiator, 0.25 to 2 parts of co-initiator and 0.3 to 1.0 part of lubricant, and the initiator is peroxide. The peroxide is used as an initiator to catalyze a grafting reaction between polycarbonate and polybutylene terephthalate, and a peroxide initiation system is subjected to a free radical reaction, so that rapid and efficient grafting is performed between PC and PBT molecular chains, and when the addition amount of PBT in the raw materials is relatively high, the prepared composite material is high in light transmittance and good in toughness. And in addition, the fluidity of the composite material is also obviously improved.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a PC / PBT composite material and its preparation method and application. Background technique [0002] Polycarbonate (PC) is an engineering resin with excellent comprehensive performance. The commonly used bisphenol A polycarbonate is widely used in the automotive industry for its outstanding impact strength, dimensional stability, transparency, and weather resistance. , electronics, office equipment and other fields have been widely used. However, the PC molecular chain has strong rigidity, large internal stress after molding, and poor chemical solvent resistance. Therefore, under the erosion of chemical solvents, it will cause the release of internal stress and cause cracking. The molecular chain of polybutylene terephthalate (PBT) is relatively flexible, and part of the internal stress can be offset by the movement of the molecular chain. By grafting PBT molecula...

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Problems solved by technology

Since the transesterification reaction is a relatively weak reaction, the PBT content in the prepared resin com

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