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Citation: TANG Li-Ming, DAI Yu. Preparation of pH-Sensitive Polyurethane Films[J]. Chinese Journal of Applied Chemistry, ;2003, 20(6): 609-610. shu

Preparation of pH-Sensitive Polyurethane Films

TANG Li-Ming ^, ,
DAI Yu

1.
Department of Chemical Engineering, Tsinghua University, Beijing 100084

Corresponding author: TANG Li-Ming,
Received Date: 20 October 2002
Available Online: 31 December 2002

A series of urethane acrylate anionomers (PU) in molar ratio of n(PEG):n(DMPA):n(HMDI):n(2-HPA)=0.3:0.7:(1.2~1.5):(0.44~1.1) were prepared in 3 steps.The structure of the prepolymer was confirmed by FT-IR and ¹H NM R analysis.pH-sensitive cross-linked films were then obtained by UV polymerization of UAA.The swelling property of the films with respect to pH was much affected by the composition of the prepolymer.The film could swell and deswell rapidly and reversibly in buffer solutions of pH=3 and pH=11.
- polyurethane,
- film,
- pH sensitivity
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