描述
化学改性PBT树脂
建筑装饰行业
交通运输行业、广告行业
电气、化工机械、汽车行业
化学改性PBT树脂
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Chemical Modified PBT Resin
Architecture Decoration Industry
Transportation Industry, Advertisement Industry
Electric & Electrical, Chemical Machinery,
Automobile Industry
Chemical Modified PBT Resin
Product Details
Chemical Modified PBT Resin
Chemical modification chemical chain extension. Due to the demand for high molecular weight PBT resin (high intrinsic viscosity ([1] ([G] ≥ 10dLog) in cables and optical cable coating materials, etc.), it is difficult to obtain high molecular weight PBT from the production process of PBT alone. Generally, only [ G]<1.0dLog. Therefore, the method of modifying PBT is used to improve its molecular weight, and the more effective method is chemical chain extension. Improve its hydrolytic stability. The use of chemical chain extension method for melt viscosification has the advantages of short process flow, low equipment investment, fast reaction speed, and controllable, high production efficiency, strong applicability, and convenient operation. The end group of PBT resin contains carboxyl and hydroxyl groups to select multifunctional active substances that can react with their end groups, such as dioxirane compounds. , two-port oxazoline, etc. are chain extenders. The PBT segment reacts with the chain extender to increase the length of the chain segment, thereby increasing its molecular weight. There are condensation type and carboxyl group addition type for the chemical chain extension of PBT. , hydroxyl addition type, carboxy-hydroxyl simultaneous addition type and other chain extension reactions. Among them, the most effective ones are carboxyl group addition type and carboxy-hydroxyl simultaneous addition type. Liquid crystal modification, in recent years, low molecular organic compound liquid crystals have appeared in large numbers and have been widely used The development and application of polymer liquid crystal has become a hot topic in polymer science today. The modification of PBT by liquid crystal polymer can improve the processing performance of PBT and improve the strength and modulus of the sample.
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