Preparation of Poly(N-Msopropylacrylamide)-B-Poly(Ethylene Glycol) and Calorimetric Analysis of Its Aqueous Solution
Preparation of Poly(N-Msopropylacrylamide)-B-Poly(Ethylene Glycol) and Calorimetric Analysis of Its Aqueous Solution
复制标题
聚N-异丙基丙烯酰胺-B-聚乙二醇的制备及其水溶液的量热分析
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
E. Tsuchida
中科院分区：
文献类型：
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作者：
H. Yoshioka;M. Mikami;Y. Mori;E. Tsuchida
摘要合成了聚N-异丙基丙烯酰胺[poly-（NIPAAm）]与亲水性聚合物聚乙二醇的嵌段共聚物。嵌段共聚物的水溶液在加热时表现出与聚（NIPAAm）均聚物类似的量热吸热峰，尽管在由NIPAAm和亲水性单体如丙烯酰胺组成的无规共聚物中，没有观察到吸热峰。这一结果表明，它是NIPAAm序列的长度，而不是亲水性共聚单体的含量的共聚物的LCST现象的主导影响。
Abstract A block copolymer composed of poly(N-isopropylacrylamide) [poly-(NIPAAm)] and a hydrophilic polymer such as poly(ethylene glycol) was prepared. The aqueous solution of the block copolymer exhibited a calorimetric endothermic peak on heating, similar to a poly(NIPAAm) homopolymer, although in a random copolymer composed of NIPAAm and a hydrophilic monomer such as acrylamide, no endothermic peak was observed. This result suggests that it is the NIPAAm sequence length which dominantly affects the LCST phenomenon of the copolymer rather than the content of hydrophilic comonomers.