PAN分子取向程度与纤维结构性能的关系  

Relationship between molecular orientation degree and structure and properties of PAN

作　　者：刘岳新[1] 徐樑华[1] 张均[1] 赵志娟[1] 

机构地区：[1]北京化工大学碳纤维及复合材料研究所,北京100029

出　　处：《合成纤维工业》2005年第1期5-8,共4页China Synthetic Fiber Industry

基　　金：国家自然科学基金资助项目(50333060)。

摘　　要：研究了丙烯腈(AN),甲叉丁二酸(ITA)聚合体系中PAN分子取向与纤维结构、性能之间的关系。 结果表明:在一定范围内,PAN分子取向因子的增加有利于提高纤维的结晶度和(100)晶面法线方向上晶粒 尺寸,提高纤维的体积密度和力学性能。但同时增加了纤维内应力,使纤维的沸水收缩率增加。综合考虑取 向因子对纤维结构性能因素的影响,认为PAN原丝晶区取向因子约为0.9、总取向因子约为0.8时,纤维力 学性能较好。The relationship between molecular orientation and structure and properties of PAN fiber was studied in acrylonitrile (AN) and itaconic acid(ITA) polymer system. The results showed that the increase of molecular orientation factor can improve the crystallinity, crystal size along with lattice plane of (100) , volume density and mechanical properties of the fiber and raise the latent stress and boiling water shrinkage at the same time. It was considered that the mechanical properties of PAN precursor was better when the orientation degree in crystalline region and overall orientation factor were about 0. 9 and 0.8, respectively.

关 键 词：PAN原丝 纤维结构 聚合体系 沸水收缩率 分子取向 丁二酸 性能 取向因子 结晶度 内应力 

分 类 号：TQ342.3[化学工程—化纤工业]