Rheo‐optical studies on aligned nematic solutions of a rodlike polymer
作者:
Mohan Srinivasarao,
G. C. Berry,
期刊:
Journal of Rheology
(AIP Available online 1991)
卷期:
Volume 35,
issue 3
页码: 379-397
ISSN:0148-6055
年代: 1991
DOI:10.1122/1.550220
出版商: The Society of Rheology
关键词: Polymeric liquid crystals;Rodlike polymer dynamics;Director orientations;Tumbling flaws;Leslie–Ericksen equations;SHEAR FLOW;NEMATIC CRYSTALS;BENZOTHIAZOLES;PHENYLENE RADICALS;ORGANIC POLYMERS;SOLUTIONS
数据来源: AIP
摘要:
Rheo‐optical studies on shear deformation of well‐aligned nematic solutions of the rodlike poly (1,4‐phenylene‐2,6‐benzobisthiazole), PBT, are reported. Conoscopic microscopy was used to follow the director during shear, and during relaxation on cessation of flow. The results show that the molecules are not homogeneously aligned in shearing flow. Rather, various complex director field distortions may occur, depending on the relative orientation of the initial director to the flow direction. The results are compared quantitatively with predictions based on the Ericksen–Leslie constitutive equation for nematic fluids.
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