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Preparation and Swelling Properties of Temperature‐Sensitive Semi‐Interpenetrating Polymer Networks Composed of Poly[( N‐tert ‐butylacrylamide)‐ co ‐acrylamide] and Hydroxypropyl Cellulose
Author(s) -
Çaykara Tuncer,
Şengül Gamze,
Birlik Gökçen
Publication year - 2006
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200600063
Subject(s) - self healing hydrogels , swelling , materials science , hydroxypropyl cellulose , kinetics , chemical engineering , acrylamide , polymer , interpenetrating polymer network , methyl cellulose , polymer chemistry , cellulose , composite material , monomer , physics , quantum mechanics , engineering
Summary: Temperature‐responsive hydrogels based on linear HPC and crosslinked P(NTBA‐ co ‐AAm) were prepared by the semi‐IPN technique. The structure of these semi‐IPN hydrogels was investigated by FT‐IR spectroscopy. An increase in normalized band ratios ( A 2980 / A 1665 ) was observed with increasing HPC content in the initial mixture. The swelling kinetics and water transport mechanism of these semi‐IPN hydrogels were examined and their temperature responsive behaviors were also investigated by measuring equilibrium swelling ratios and pulsatile swelling experiments. The results showed that these semi‐IPN hydrogels underwent a volume phase transition between 18 and 22 °C irrespective of the amounts of MBAAm and HPC. However, below the volume phase transition temperature, their equilibrium swelling ratios were affected by the amount of MBAAm and HPC. The pulsatile swelling experiments indicated that the lower the MBAAm and the higher HPC contents in semi‐IPN hydrogels the faster the response rate temperature change.Equilibrium swelling ratios of the semi‐IPN P(NTBA‐ co ‐AAm)/HPC hydrogels in water shown as a function of temperature.