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Effect of crosslinking structure on sorption of CO 2 in photocrosslinked PVCA film
Author(s) -
Matsuguchi Masanobu,
Miura Junichi,
Sakai Yoshiro
Publication year - 2000
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 - 10.1002/1097-4628(20001205)78:10<1744::aid-app50>3.0.co;2-v
Subject(s) - sorption , adsorption , langmuir , chemical engineering , polymer chemistry , degree (music) , materials science , chemistry , organic chemistry , physics , acoustics , engineering
The sorption behavior of CO 2 gas in photocrosslinked poly(vinyl cinnamate) film was examined under atmospheric pressure. The sorption isotherm was well described by the Langmuir equation, suggesting that sorption of CO 2 is mainly governed by adsorption in the microvoids. The amount of sorbed CO 2 was significantly affected by the degree of crosslinking. The CO 2 sorption was enhanced at a lower degree of crosslinking but was decreased at a higher degree of crosslinking. The unexpected increase in the amount of adsorbed CO 2 correlated with the increase in the number of microvoids that occurred as a result of the crosslinking reaction. However, further crosslinking led to a decrease in the mean size of the microvoids. The smaller microvoids, in comparison to CO 2 molecules, did not act as adsorption sites, so that the amount of sorbed CO 2 decreased. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1744–1750, 2000