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Synthesis and characteristics of interpenetrating polymer network hydrogel composed of chitosan and poly(acrylic acid)
Author(s) -
Lee Jin Woo,
Kim So Yeon,
Kim Seong Soo,
Lee Young Moo,
Lee Kwang Hyun,
Kim Seon Jeong
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(19990705)73:1<113::aid-app13>3.0.co;2-d
Subject(s) - chitosan , acrylic acid , polyelectrolyte , self healing hydrogels , interpenetrating polymer network , swelling , polymer chemistry , crystallinity , materials science , polymer , fourier transform infrared spectroscopy , chemical engineering , composite material , copolymer , engineering
Interpenetrating polymer network (IPN) hydrogels composed of chitosan and poly(acrylic acid) (PAAc) were synthesized by UV irradiation method, and their structure, crystallinity, swelling behavior, thermal property, and mechanical property were investigated. Chitosan/PAAc IPNs exhibited relatively high equilibrium water content and also showed reasonable sensitivity to pH. From the swelling behaviors at various pH's, Fourier transform infrared spectra at high temperature and thermal analysis confirmed the formation of polyelectrolyte complex due to the reaction between amino groups in chitosan and carboxyl groups in PAAc. For this reason, even at a swollen state, the present chitosan/PAAc IPNs possess good mechanical properties. Particularly, the CA‐2 sample (with a weight ratio of chitosan/PAAc = 50/50, molar ratio [NH 2 ]/[COOH] = 25/75) showed the lowest equilibrium water content and free water content, attributed to the more compact structure of the polyelectrolyte than CA‐1 or CA‐3 due to the high amount of interchain bond within the IPN. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 113–120, 1999