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Rheological behavior of semi‐aromatic transparent polyamide
Author(s) -
Chen Jinzhou,
Qu Liangjun,
Li Xinfa,
Jiang Aiyun,
Niu Mingjun,
Wang Jingwu
Publication year - 2005
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.21607
Subject(s) - activation energy , shear rate , rheology , materials science , rheometer , shear thinning , viscosity , composite material , polyamide , capillary action , shear stress , shear (geology) , apparent viscosity , newtonian fluid , thermodynamics , polymer chemistry , chemistry , organic chemistry , physics
The rheological behaviors of semi‐aromatic transparent polyamide (SATPA) melt are investigated using a capillary rheometer. The effects of shear rate, shear stress, and temperature on the apparent viscosity η a of SATPA are discussed. A correlation of non‐Newtonian index with temperature is obtained. The results show the shear thinning of SATPA; meanwhile η a decreases with increasing temperature and shear rate, and the viscous flow activation energy is further obtained from temperature dependence of the samples. It was concluded that the apparent viscosity η a is sensitive to temperature at lower shear rate owing to the higher viscous flow activation energy; on the contrary, the influence of temperature effect on the apparent viscosity becomes minor at higher shear rate due to the lower viscous flow activation energy. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1586–1589, 2005