LCST and UCST behavior of poly(N-vinylacetamide-co-acrylic acid) aqueous solution

Masashi Nakashima, Yasuhisa Fukuda, Takeshi Mori, Keiji Minagawa, Masami Tanaka

研究成果: Contribution to conferencePaper査読

抄録

The phase transition behavior of random copolymers of N-vinylacetamide (NVA) with Acrylic acid (AA) have been investigated. The copolymer aqueous solutions show both an upper critical solution temperature (UCST) and a lower critical solution temperature (LCST). The UCST increased and the LCST decreased with increase of salts concentration. The dual thermosensitivity was not observed at pH>3.00. This indicates that it is necessary to protonate the AA units to show the dual thermosensitivity. In short, the copolymers formed intraand inter-polymer hydrogen bondings. Intra- and inter-polymer hydrogen bondings were confirmed by FT-IR measurements.

本文言語英語
ページ数1
出版ステータス出版済み - 12 1 2005
外部発表はい
イベント54th SPSJ Annual Meeting 2005 - Yokohama, 日本
継続期間: 5 25 20055 27 2005

その他

その他54th SPSJ Annual Meeting 2005
国/地域日本
CityYokohama
Period5/25/055/27/05

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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