可控交联聚醚醚酮的动态力学性能

动态力学分析技术(DMA)是研究聚合物性能的重要方法之一．动态力学实验可以检测聚合物的玻璃化转变温度和次级松弛过程，直接与聚合物的链结构和聚集态结构密切相关，聚合物的化学组成、支化和交联、结晶和取向、增塑和共混等结构因素的变化，都与分子运动状态的变化密切相关，而分子运动的变化又能灵敏地反映在动态力学性能上，

Dynamic Mechanical Properties of Controllable Cross-linking Poly(ether ether ketone)s

Dynamic mechanical analysis(DMA) was used to investigate the dynamic mechanical and thermal properties of the controllable cross-linking poly(ether ether ketone)s containing thioether bond and pure poly(ether ether ketone). The processes of cross-linking reaction were monitored with the changes in storage modulus(E') and tanδ with the change of temperature. The storage modulus(E') increases in the high temperature region and tanδ shifts toward high temperature with increasing the degree of cross-linking. Comparing dynamic mechanical properties of pure poly(ether ether ketone) with that of the controllable cross-linking poly(ether ether ketone)s, we can conclude that the cross-linking reaction could occurred at the sites of thioether bonds. The novel polymer can be processed as conveniently as thermoplastic material before cross-linking and has a high application temperature as thermosetting material after cross-linking. It can be applied to a new technological region.