摘要
采用旋转流变仪对聚丙烯腈/二甲基亚砜(PAN/DMSO)溶液进行了流变学测试,探究了表观黏度(ηα)、储能模量、损耗模量、损耗正切角与温度、浓度以及剪切情况之间的关系,明确了PAN链缠结对PAN/DMSO溶液流变行为及其分子结构的影响,探究了PAN链缠结与浓度、温度及剪切速率之间的关系。结果表明,预剪切可以有效地拆除部分PAN链的缠结,使PAN/DMSO溶液ηα降低,且温度升高及浓度降低时剪切作用对ηα的影响作用减小,流变稳定性提高。
The rheological behaviors of polyacrylonitrile(PAN)/dimethyl sulfoxide(DMSO)solutions were measured with a rotary rheometer,and the relationships of apparent viscosity(ηα),storage modulus,loss modulus and loss tangent angle with the temperature,concentration and shearing conditions were investigated.The effect of PAN chain entanglement on the rheological behavior and molecular structure of PAN/DMSO solution were studied.The results indicated that pre-shear could effectively make the PAN chains disentangle to some extent and therefore resulted in a decrease of theηαof PAN/DMSO solution.Moreover,the effect of shear on theηαwas reduced with increasing the temperature and decreasing the concentration.As a result,the rheological performance of PAN/DMSO solution was improved.
作者
邢洋洋
王冲
付中禹
刘士禹
张会轩
XING Yang;WANG Chong;FU Zhongyu;LIU Shiyu;ZHANG Huixuan(School of Chemical Engineering,Changchun University of Technology,Changchun 130012,China;Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;Jilin Railway Technology College,Jilin 132200,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2020年第4期1-5,共5页
China Plastics
关键词
聚丙烯腈
流变
链缠结
polyacrylonitrile
rheology
chain entanglement
