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Please use this identifier to cite or link to this item: http://hdl.handle.net/10087/3155

Title: Synthesis and phase behavior of aqueous poly(N-isopropylacrylamide-co-acrylamide), poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide) and poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate)
Authors: Shen, Zheyu
Terao, Ken
Maki, Yasuyuki
Dobashi, Toshiaki
Ma, Guanchui
Yamamoto, Takao
Keywords: N-isopropylacrylamide
random copolymer
coil to globule phase transition
lower critical solution temperature
hydrodynamic radius
Issue Date: Jun-2006
Publisher: Springer
Citation: Colloid and polymer science. 284(9), 1001-1007 (2006)
Abstract: Poly(N-isopropylacrylamide) (PNIPAM) and random copolymers of Poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate) (PNIPAM-HEMA), poly(N-isopropylacrylamide-co-acrylamide) (PNIPAM-AAm) and poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide) (PNIPAM-DMAA) with various volume fractions of NIPAM g, were synthesized by radical polymerization. The phase behavior of the polymers in water was investigated by means of optical transmittance and dynamic light scattering. With decreasing g, the cloud point temperature Tcp for PNIPAM-HEMA decreased whereas Tcp for both PNIPAM-AAm and PNIPAM-DMAA increased. Increase of hydrodynamic radius around Tcp resulted from the aggregation of the globules of each polymer was observed from dynamic light scattering. The relationships between the reciprocal of Tcp of the polymer solutions and 1-g were linear for the three copolymers in the experimental range of 0.65 < g < 1. The results are discussed from the aspect of the interaction parameters of copolymer solutions.
URI: http://hdl.handle.net/10087/3155
ISSN: 0303-402X
Appears in Collections:学術雑誌論文

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