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Swelling behavior of crosslinked hydroxypropyl cellulose films retaining cholesteric liquid crystalline order. I. Effect of temperature
Author(s) -
Suto Shinichi,
Kawano Masafumi
Publication year - 1999
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/(sici)1097-4628(19990808)73:6<1015::aid-app20>3.0.co;2-k
Subject(s) - swelling , amorphous solid , materials science , hydroxypropyl cellulose , chemical engineering , composite material , polymer chemistry , cellulose , chemistry , organic chemistry , polymer , engineering
Temperature dependence of the swelling behavior in both water and propanol was determined for the crosslinked hydroxypropyl cellulose (HPC) films retaining cholesteric liquid crystalline order (CLCO) and for the crosslinked amorphous HPC films. The dependence of swelling behavior in water for the films retaining CLCO was different from that of the amorphous films. With increasing temperature, the equilibrium swelling ratio ( B e ) for the films retaining CLCO decreased, whereas B e for the amorphous films increased. In propanol, both films exhibited the same temperature dependence. B e increased with increasing temperature. The increasing rate of the swelling in transient state showed similar temperature dependence on B e . The increasing rate for the films retaining CLCO decreased with temperature, but that for the amorphous films increased in water; in propanol, the increasing rate for two types of films increased. The difference in the swelling behavior between the two types of films may be due to the difference in the number‐average molecular weight between crosslinks. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 1015–1022, 1999