Premium
Shear flow behaviors of poly( p ‐phenylene benzobisoxazole) spinning dope
Author(s) -
Chen Xiaojun,
Liu Xiaoyun,
Qian Jun,
Zhuang Qixin,
Li Xinxin,
Han Zhewen
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28820
Subject(s) - materials science , spinning , polymer chemistry , rheology , rheometer , viscosity , shear stress , phenylene , poly(p phenylene) , capillary action , composite material , shear viscosity , chemical engineering , polymer , engineering
Abstract 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 temperature, 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 molecular weight, and PBO concentration. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008