文献类型：期刊文献

英文题名：Shear flow behaviors of poly(p-phenylene benzobisoxazole) spinning dope

作者：Chen, Xiaojun[1]; Liu, Xiaoyun[1]; Qian, Jun[1]; Zhuang, Qixin[1]; Li, Xinxin[1]; Han, Zhewen[1]

机构：[1] Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2008

卷号：110

期号：3

起止页码：1899

外文期刊名：Journal of Applied Polymer Science

收录：EI(收录号：20084311651725)

语种：英文

外文关键词：Aromatic compounds - Liquid crystal polymers - Viscosity - Non Newtonian flow - Shear stress

摘要：In this study, the shear flow properties of Poly(p-phenylene benzobisoxazole) (PBO)/poly(phosphoric acid) (PPA) spinning dope were studied by means of capillary rheometer. The effect of shear stress, temperature, PBO concentration, and PBO molecular weight on the apparent viscosity of PBO/PPA dope was discussed. The results showed that the apparent viscosity of the dope decreased with the increase of the shear stress and the temperature. The flow behavior index increased with the increase of tempera-ture, which indicated that the non-Newtonian behavior of the dope became weaker at high temperature. Moreover, it was also found that at high shear stress, the apparent viscosity of the dope was insensitive to the temperature, PBO mo-lecular weight, and PBO concentration. ? 2008 Wiley Periodicals, Inc.