热水浴拉伸对聚丙烯腈初生纤维结构和性能的影响  

Effect of hot water drawing on structure and properties of polyacrylonitrile nascent filament

作　　者：王琴[1] 梁晓怿[1] 吕春祥[2] 刘鸿鹏[1] 凌立成[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]中国科学院山西煤炭化学研究所中科院炭材料重点实验室,山西太原030001

出　　处：《合成纤维工业》2009年第2期7-10,共4页China Synthetic Fiber Industry

基　　金：国家自然科学基金项目(50672025);上海市登山行动计划项目(06DZ22003)

摘　　要：研究了聚丙烯腈(PAN)初生纤维在热水浴拉伸过程中超分子结构和力学性能的变化。结果表明:PAN初生纤维中的内应力随拉伸温度的升高而减小,随拉伸速率和拉伸倍数的提高而增大;初生纤维在热水浴中的玻璃化转变温度约为80℃,当水浴温度低于和高于80℃时,纤维分别发生冷拉和高弹形变;PAN初生纤维的结晶度和晶区取向度随拉伸温度的升高先增大后减小,随拉伸速率和拉伸倍数的升高而增大。The change in the supermoleeular structure and mechanical properties of polyaerylonitrile （PAN） nascent filament was studied during the hot water drawing. The results showed that the latent stress of PAN nascent filament was decreased while elevating drawing temperature and was inereased while raising drawing velocity and draw ratio. The PAN nascent filament had the glass transition temperature about 80℃ in hot water bath. The cold drawing and high elastic deformation occurred at the bath tem- perature above and below 80℃, respectively. The erystallinity and crystalline orientation of PAN naseent filament were increased and then decreased while elevating drawing temperature and were increased while raising drawing velocity and draw ratio.

关 键 词：聚丙烯腈纤维 结晶度 取向度 内应力 

分 类 号：TQ342.31[化学工程—化纤工业]