Citation: 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 Physico-Chimica Sinica, ;2010, 26(08): 2189-2194. doi: 10.3866/PKU.WHXB20100819 shu

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

1.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, P. R. China

Received Date: 2 March 2010
Available Online: 23 June 2010
Fund Project: 国家自然科学基金(20973106)资助项目 (20973106)

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.
- Temperature sensitivity,
- Poly(N,N-diethylacrylamide-co-N-acryloxysuccinimide),
- Lower critical solution temperature,
- Medium,
- Environmental effect
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沈阳化工大学材料科学与工程学院沈阳 110142