Super-tough PC (polycarbonate)/PBT (Polybutylece Terephthalate)/PET (Polyethylene Glycol Terephthalate) alloy and preparation method thereof

Abstract

The invention relates to a super-tough PC (polycarbonate)/PBT (Polybutylece Terephthalate)/PET (Polyethylene Glycol Terephthalate) alloy and a preparation method thereof. The alloy comprises the following components in percentage by weight: 35-65% of PC, 10-40% of PBT, 10-40% of PET, 4-8% of toughening compatilizer, 0.4-1% of antioxidant and 0.4-1% of processing agent, wherein the toughening compatilizer is an ethylene-methyl acrylate copolymer and/or an ethylene-methyl acrylate-glycidyl methacrylate copolymer. The preparation method comprises the following steps of: drying raw materials; then sufficiently mixing; co-mixing; extruding and pelletizing. Compared with the PC/PBT alloy, the PC/PBT/PET ternary alloy has remarkable advantages in the aspects of rigidity, toughness, heat resistant temperature and size stability, has higher cost performance and greatly improved toughness, and is the alloy with excellent comprehensive performance and high cost performance.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to the modification technology of thermoplastic polymer materials, and relates to a super-tough PC / PBT / PET alloy and its Preparation. [0002] Background technique [0003] Polycarbonate (PC) is a transparent and colorless thermoplastic, which has the advantages of high rigidity, toughness, dimensional stability, weather resistance and low temperature resistance, but has the disadvantages of high melt viscosity, poor fluidity, and processing Difficulty and poor solvent resistance and other shortcomings, so its application range is limited. [0004] Polybutylene terephthalate (PBT) is a crystalline thermoplastic, which has the advantages of fast crystallization, chemical resistance and good fluidity, but its impact strength is low. [0005] The blending of PC and PBT can not only overcome the shortcomings of PC such as poor chemical resistance and poor molding processability, but ...

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Problems solved by technology

[0008] In order to solve the problems of high cost or poor rigidity and heat resistance in the prior art polyester alloys, the present invention proposes a polyester alloy w