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Photoinitiated crosslinking of hydroxypropyl cellulose in the isotropic and liquid crystal states
Author(s) -
Song Cheng Qian,
Litt Morton H.,
ManasZloczower Ica
Publication year - 1991
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.1991.070420917
Subject(s) - mesophase , liquid crystal , materials science , hydroxypropyl cellulose , isotropy , cellulose , texture (cosmology) , shear (geology) , chemical engineering , relaxation (psychology) , shear rate , polymer chemistry , liquid crystalline , composite material , rheology , optics , polymer , psychology , social psychology , physics , optoelectronics , image (mathematics) , artificial intelligence , computer science , engineering
The influence of temperature, concentration, and shear rate on the formation of liquid crystal solutions of hydroxypropyl cellulose (HPC) in DMAc and the preservation of the structure by photoinitiated crosslinking were investigated. The rate of changes in the relaxation pattern for the characteristic band texture of HPC liquid crystals after cessation of shear is inversely proportional to the extent of the crosslinking. This shows that the liquid crystalline structure is preserved upon crosslinking. The molecular orientation of the crosslinked films as a function of mesophase organization and concentration during crosslinking was studied.