热致液晶聚芳酯/聚醚醚酮复合纤维非等温结晶动力学研究  

Non-isothermal crystallization kinetics of thermotropic liquid crystalline polyarylates /poly( ether ether ketone) s composite fibers

作　　者：曾栌贤 吴婷[1] 徐建军[1] 叶光斗[1] 刘鹏清[1,2] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065 [2]四川大学轻纺与食品学院,四川成都610065

出　　处：《合成纤维工业》2013年第6期5-9,共5页China Synthetic Fiber Industry

基　　金：国家科技支撑项目(2008BAE59B03)

摘　　要：通过熔融纺丝法制备了聚芳醚酯(PEAR)/聚醚醚酮(PEEK)和聚芳醚酮酯(PEKAR)/PEEK两种热致液晶聚芳酯/PEEK复合纤维,采用差示扫描量热仪(DSC)研究了热致液晶聚芳酯对PEEK纤维结晶行为的影响,并用Jeziorny方法、Ozawa方法、莫志深方法描述了复合纤维的非等温结晶动力学。结果表明:热致液晶聚芳酯PEAR和PEKAR在复合体系中起到了成核剂的作用,使体系的结晶度和结晶完善程度增加;莫志深方法可以很好地描述复合纤维的非等温结晶行为,而Jeziorny方法和Ozawa方法对本体系则不适用;莫志深方法分析结果表明,PEAR可降低PEEK的结晶速率,而PEKAR可提高PEEK的结晶速率。Two kinds of thermotropic liquid crystalline polyarylates/poly （ ether ether ketone） s （PEEK） composite fibers, i.e. polyetherarylates （PEAR）/PEEK composite fiber and poly（ ether ketone arylates） （PEKAR）/PEEK composite fiber, were prepared via melt spinning process. The effect of thermotropic liquid crystalline polyarylates on the crystallization behavior of PEEK fibers was studied by differential scanning calorimetry （ DSC ）. The non-isothermal crystallization behavior of the composite fibers was evaluated using Jeziorny, Ozawa and Mozhisben equations. The results showed that the therrnotropic liquid crystalline PEAR and PEKAR acted as nucleation agents in the composite system and improved the erystallinity and crystallization perfection of the composite system ; Mozhishen equation can be used to describe the non-isothermal crystallization kinetics of the composite fibers very well, but Jeziorny and Ozawa equations were not suitable. Mozhisben equation analysis showed that PEAR could decrease the crystallization rate of PEEK when PEKAR could increase it.

关 键 词：热致液晶聚芳酯 聚醚醚酮 复合纤维 非等温结晶动力学 

分 类 号：TQ340.1[化学工程—化纤工业]