聚砜与热致液晶聚合物原位复合材料相变温度的研究
TRANSITION TEMPERATURES OF THERMOTROPIC LIQUID CRYSTALLINE POLYMERS AND POLYSULFONE IN SITU COMPOSITES
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摘要: 系统探讨了液晶聚合物的分子结构、热历史、增容剂等对聚砜和液晶聚合物原位复合体系相变温度的影响.结果表明,液晶聚合物与聚砜分子结构相似时,二者相容性较好;测试时升温速率越高,所得DSC曲线的峰幅越大.第二次加热有利于测试玻璃化转变温度;加入增容剂,原位复合材料中二组分间相互作用增强.最后,研究了原位复合材料的热机械性能,纯聚合物的温度-形变曲线上只有一个转折点,而原位复合材料有两个分别对应于纯组分的转折点.Abstract: Abstract The effects of liquid crystalline polymers’ structure, thermal history and compatibilizers on the transition temperatures of polysulfone with thermotropic liquid crystalline polymers’ in-situ composites were studied. The compatibility of polysulfone and liquid crystalline polymers obeyed the similar structure rule, and it could be improved by adding block copolymers.High heating rate could get a big peak in DSC curve, and it is easy to obtain Tg value by second heating. The thermal mechanical properties of these blends were also studied.
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