Polybutylene terephthalate/polyphenylether composite material

Abstract

The invention discloses a polybutylene terephthalate/polyphenylether (PBT/PPO) composite material, which comprises the following components in percentage by weight: 55 to 80 percent of polybutylene terephthalate, 15 to 30 percent of polyphenylether, 3.0 to 12 percent of compatilizer, 0.3 to 1.0 percent of oxidation inhibitor, and 0.5 to 2.0 percent of processing aid. The compatilizer is obtained by reacting and extruding a polar copolymer A, a polar copolymer B, an activated monomer and an initiator, wherein the extruding temperature is of between 180 and 200 DEG C; the polar copolymer A is acopolymer which contains glycidyl methacrylate; the polar copolymer B is polystyrene or a copolymer thereof; and the activated monomer is an organic acid or an ester. The PBT/PPO composite material of the invention has the characteristics of good processing property and mechanical property; and the used compatilizer has the advantages of strong compatibility, little dosage, simple preparation andthe like, and overcomes the defects of poor compatibility and high cost in the conventional PBT/PPO composite material.

Description

technical field [0001] The invention relates to a polybutylene terephthalate / polyphenylene ether composite material, which belongs to the technical field of polymer composite materials. Background technique [0002] Polyphenylene oxide (PPO) has good physical and mechanical properties, electrical insulation, heat resistance, flame retardancy and chemical stability. Its creep resistance at high temperature is the best among all thermoplastic engineering plastics, and it has the characteristics of good hydrolytic stability, molding shrinkage rate and thermal expansion coefficient. The disadvantages of PPO are high melt viscosity, difficult processing, poor impact resistance, easy stress cracking of products, easy aging and crosslinking under ultraviolet light, poor resistance to polar solvents, etc., so PPO is rarely used alone. Currently 90% of PPO is blended with other polymers or chemically modified. Domestic and foreign scientific and technological workers have done a lo...

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Problems solved by technology

Although the above-mentioned methods are all beneficial to improve the compatibility of the blend system, and improve the processability and mechanical properties of the PBT / PPO alloy to a certain extent, the polybutylene terephthalate / polyethylene terephthalate prepared by the above-mentioned prior art All phenylene ether composite materials have the defects of unsatisfactory compatibility and high cost

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