P(DEAM-co-NAS)的合成及其温敏性的环境效应

doi:10.3866/PKU.WHXB20100819

Abstract

Abstract:

Poly(N,N-diethylacrylamide-co-N-acryloxysuccinimide) (P(DEAM-co-NAS)) was synthesized by free radical solution polymerization and copolymerization ratios of 7.9∶1, 3.5∶1, 2.5∶1, 2∶1, 1.5∶1 were used. The copolymer structures were characterized by Fourier transform infrared (FTIR) spectrometry and nuclear magnetic resonance (¹H NMR). The copolymer compositions and the properties of the medium environment largely influence the temperature sensitivities of the P(DEAM-co-NAS) aqueous solutions. The lower critical solution temperature (LCST) of the P(DEAM-co-NAS) aqueous solution increased with an increase in the NAS content. The addition of salts resulted in a linear decrease in the LCST of the P(DEAM-co-NAS) aqueous solution and this depended on the anion valence of the salts. The addition of organic acids can reduce the LCST of the P(DEAM-co-NAS) aqueous solution. Moreover, the addition of NaOH, ethylenediamine, and putrescine leads to an increase in the LCST of the P(DEAM-co-NAS) aqueous solution. The effects of ethylenediamine and putrescine on the LCST of the P(DEAM-co-NAS) aqueous solution were greater than that of NaOH.

Key words: Temperature sensitivity, Poly(N,N-diethylacrylamide-co-N-acryloxysuccinimide), Lower critical solution temperature, Medium, Environmental effect

MSC2000:

O648

ZHANG Sa, LIU Shou-Xin, HAN Xiao-Yu, DANG Li, QI Xiao-Jun, YANG Xi. Synthesis of P(DEAM-co-NAS) and the Environmental Effects of Its Temperature Sensitivity[J].Acta Phys. -Chim. Sin., 2010, 26(08): 2189-2194.

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Synthesis of P(DEAM-co-NAS) and the Environmental Effects of Its Temperature Sensitivity

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