Cold resistant and high thermal resistance PPA (Phenyl-Propanolamine)/PETG (Polyethylene Terephthalate Glycol) alloy as well as preparation method and application of alloy

Abstract

The invention relates to a gold resistant and high thermal resistance PPA (Phenyl-Propanolamine) / PETG (Polyethylene Terephthalate Glycol) alloy as well as preparation method and application of the alloy. The alloy comprises the following components in parts by weight: 29 to 54.6 parts of PPA, 10 to 20 parts of PETG, 5 to 15 parts of toughening agent, 30 to 35 parts of alkali-free glass fiber, 0.2 to 0.5 part of an antioxidant, and 0.2 to 0.5 part of a processing agent, wherein the toughening agent is prepared by compounding maleic anhydride grafted SEBS (Styrene-Butadiene-Styrene) with maleic anhydride grafted ethylene-butylene-copolymer; the antioxidant is a phenol or phosphonolipid antioxidant; and the processing agent is one of EBS (Ethylene Bis Stearamide) and silicone powder or a mixture obtained by compounding EBS and silicone powder. The preparation method comprises the following steps in sequence: uniformly mixing and stirring all the raw materials except the alkali-free glass fibers; feeding the alkali-free glass fibers while melting and extruding; cooling; drying in the air; cutting into granules; and processing by strong magnet, thus obtaining the finished product of the alloy. The alloy is higher in impact strength, electrical property, modulus, rigidity and surface gloss, and can be normally used at all temperatures.

Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a cold-resistant and high-heat-resistant PPA / PETG alloy and its preparation method and application. Background technique

[0002] Polyphthalamide (PPA for short) is a semi-aromatic polyamide made of terephthalic acid or phthalic acid. It is a semi-crystalline thermoplastic aromatic polyamide, commonly known as aromatic high-temperature nylon. The new type of high-temperature resistant, high-performance special engineering plastics developed and mass-produced first by Weiwei Company. It has the advantages of high rigidity, high heat resistance, high strength and excellent electrical properties. The melting point of polyphthalamide is between 310-325°C, the heat distortion temperature can be between 260-280°C, it can withstand the continuous high temperature of 200°C, and it can also maintain good dimensional stability. PPA has superior environmental performance and c...

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