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合成了多种不同配比的N 异丙基丙烯酰胺 (NIPAM )与丙烯酰胺 (AM )的共聚物 .用荧光探针法研究了共聚物溶液荧光光谱随温度升高而引起的变化 .研究表明 :共聚物的最低临界溶液温度 (LCST)取决于AM与NIPAM的组成比 .AM的比例越大 .LCST就越高 ,且有较好的正比关系 .通过以共价键连接于共聚物的荧光探针法 (标记法 )和以小分子探针混入共聚物水溶液的方法 (混入法 )测定上述体系LCST的结果比较 ,发现标记探针法具有较高的灵敏度 ,更适宜用来研究共聚物水相体系的相变问题 .
A series of copolymers of NIPAM and acrylamide (AM) were synthesized.The fluorescence spectra of copolymers were studied by fluorescence probe method.The results show that : The minimum critical solution temperature (LCST) of the copolymer depends on the composition ratio of AM to NIPAM. The higher the ratio of AM, the higher the LCST and the better the proportional relationship. By covalently linking the fluorescence of the copolymer Comparison of the results of the probe method (labeling method) and the method of using a small molecule probe mixed into the copolymer aqueous solution (mixed method) to find the LCST of the above-mentioned system shows that the labeled probe method has higher sensitivity and is more suitable for studying the copolymer water Phase system of phase change issues.