Reversible thermoresponsive behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) in mixed solvent of tetrahydrofuran/hexane
Reversible thermoresponsive behavior of poly(2-chloroethyl vinyl ether-alt-maleic anhydride) in mixed solvent of tetrahydrofuran/hexane
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DOI：
10.1007/s00396-011-2395-y
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发表时间：
2011-03
影响因子：
2.4
通讯作者：
Zhenjie Liu;Yongliang Guo;K. Inomata
中科院分区：
文献类型：
--
作者：
Zhenjie Liu;Yongliang Guo;K. Inomata
通过调节四氢呋喃(THF)和正己烷混合溶剂中的溶剂组成，聚(2-氯乙基乙烯基醚-ALT-马来酸酐)可以可逆地表现出低临界溶液温度型相行为。考察了溶剂组成和聚合物浓度对聚合物溶液浊点的影响。高相对分子质量聚合物的浊点温度低于低相对分子质量聚合物。为了从分子水平上理解聚合物溶液的热响应行为，我们还测量了THF-d8和正己烷混合溶剂中的高分辨1H核磁共振谱，但不能识别浊点附近核磁共振信号的任何不连续变化。
Poly(2-chloroethyl vinyl ether-alt-maleic anhydride) can exhibit lower critical solution temperature-type phase behavior reversibly by tuning the solvent composition in mixed solvent of tetrahydrofuran (THF) and hexane. The effect of solvent composition and polymer concentration on cloud point of polymer solution was investigated. The cloud point temperature for high molecular weight polymer was lower than that for lower molecular weight polymer. High resolution1H NMR spectra in mixed solvent of THF-d8and hexane were also measured for comprehending thermoresponsive behavior of polymer solution in molecular level; however, any discontinuous change in the NMR signals around the cloud point could not be recognized.