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为了研究不同疏水化修饰的聚Ｎ异丙基丙烯酰胺（ＰＮＩＰＡＭ）高分子的水溶液性质，合成了一系列Ｎ异丙基丙烯酰胺（ＮＩＰＡＭ）和长链丙烯酸酯及丙烯酸胆固醇酯的共聚物．利用表面张力法证实了该类共聚物在室温下都具有良好的表面活性，在水溶液中能够形成胶束．利用荧光探针法，研究了共聚物的低温临界溶液温度（ＬｏｗｅｒＣｒｉｔｉｃａｌＳｏｌｕｔｉｏｎＴｅｍｐｅｒａｔｕｒｅ，ＬＣＳＴ），发现，随着丙烯酸酯碳链及其配比（摩尔投料比）的变化，共聚物的ＬＣＳＴ变化不明显，但它们都比均聚的ＰＮＩＰＡＭ要低；利用荧光偏振法研究了共聚物在水溶液中的微粘度，发现其微粘度不随共聚物中丙烯酸酯链长和配比的变化而变化，说明了该类共聚物在室温下能够形成相类同的胶束内核．
In order to study the aqueous solution of different hydrophobically modified poly (N-isopropylacrylamide) (PNIPAM) polymers, a series of copolymers of N-isopropylacrylamide (NIPAM) and long chain acrylate and cholesteryl acrylate . The surface tension method was used to confirm that these copolymers have good surface activity at room temperature and form micelles in aqueous solution. Using the fluorescence probe method, the lower critical solution temperature (LCST) of the copolymer was studied. It was found that the LCST change of the copolymer was not obvious with the change of the carbon chain of acrylate and its molar ratio Both of them are lower than the homopolymer PNIPAM. By means of fluorescence polarization method, the microviscosity of the copolymer in aqueous solution was studied. It was found that the microviscosity did not change with the change of the acrylate chain length and the ratio in the copolymer. The material is capable of forming similar micellar cores at room temperature.