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Gel Formation and Molecular Characteristics of Poly( N ‐isopropylacrylamide) Prepared by Free‐Radical Redox Polymerization in Aqueous Solution
Author(s) -
Xu Yingjia,
Li Guang,
Haraguchi Kazutoshi
Publication year - 2010
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/macp.200900565
Subject(s) - lower critical solution temperature , poly(n isopropylacrylamide) , polymer chemistry , aqueous solution , polymerization , chemistry , radical polymerization , monomer , solution polymerization , redox , copolymer , polymer , organic chemistry
The molecular characteristics of poly( N ‐isopropylacrylamide) (PNIPA), prepared by free‐radical polymerization using an aqueous redox initiator and reaction conditions comparable to those used in the synthesis of nanocomposite gels, were investigated by altering the monomer concentration ([NIPA]) and the polymerization temperature ( T p ) across the transition temperature (LCST). When T p LCST, gels were not formed regardless of [NIPA]. The structure and mechanism of formation of self‐crosslinked PNIPA gels are discussed.