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)

フォーマット:

論文

責任表示:

Shen, Zheyu ; Terao, Ken ; Maki, Yasuyuki ; Dobashi, Toshiaki ; Ma, Guanchui ; Yamamoto, Takao

言語:

英語

出版情報:

Springer, 2006-06

著者名:

Shen, Zheyu

Terao, Ken

Maki, Yasuyuki

Dobashi, Toshiaki

Ma, Guanchui

Yamamoto, Takao

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掲載情報:

Colloid and polymer science. 284(9), 1001-1007 (2006)

ISSN:

0303-402X    

巻:

284

通号:

9

開始ページ:

1001

終了ページ:

1007

バージョン:

AM

概要:

application/pdf<br />Journal Article<br />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. 続きを見る