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Interpenetrating Networks of Poly( N ‐isopropyl‐acrylamide) with Anionic and Cationic Polymers
Author(s) -
Dhara Dibakar,
Nisha C. K.,
Chatterji Prabha R.
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011201)202:18<3617::aid-macp3617>3.0.co;2-5
Subject(s) - cationic polymerization , polymer chemistry , swelling , poly(n isopropylacrylamide) , polymer , isopropyl , acrylamide , acrylic acid , chemistry , materials science , copolymer , organic chemistry , composite material
A series of interpenetrating polymer networks (IPNs) of poly( N ‐isopropylacrylamide) (PNIPA) with anionic poly(acrylic acid) (PAA) and cationic poly[[3‐(methacryloylamino)propyl]trimethylammonium chloride] (PMAPTAC) have been synthesized. The swelling behavior of the IPNs is monitored as a function of both pH and temperature. The swelling ratios of IPNs are significantly larger than those reported for pure PNIPA gels. [PNIPA‐PAA] IPNs show a continuous volume phase transition (VPT) at pHs below the p K a of PAA and at pH > p K a the IPNs show a temperature independent swelling. [PNIPA‐PMAPTAC] IPNs do not exhibit VPT at any given pH and over the range of temperatures studied.