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以3-羟基肉桂酸(3HCA)和聚乙二醇(PEG)为单体,通过熔融缩聚反应,制备了一种新型光敏性聚合物(P3HCA-b-PEG),并利用红外和核磁对其组成结构进行了表征,并对聚合物的光敏和荧光性能进行了分析。研究表明:通过对单体投料比的控制,材料具有了可控的光敏和荧光性。聚合物中肉桂酰基的紫外特征吸收峰强度随着紫外光照时间的增加而逐渐减弱,且3HCA含量越多,强度减弱越快;聚合物的荧光发射光谱出现在400~650nm之间,3HCA含量越大,聚合物的荧光强度越大,并呈现出一定的线性关系。
A novel photoactive polymer (P3HCA-b-PEG) was prepared by melt polycondensation using 3-hydroxycinnamic acid (3HCA) and polyethylene glycol (PEG) as monomers. The structure of the polymer was characterized and the photosensitivity and fluorescence properties of the polymer were analyzed. The research shows that the material has controllable photosensitivity and fluorescence by controlling the monomer feeding ratio. The intensity of ultraviolet absorption peak of cinnamoyl group in the polymer gradually decreased with the increase of ultraviolet light irradiation time, and the more the 3HCA content was, the faster the intensity decreased. The fluorescence emission spectrum of the polymer appeared between 400 and 650 nm. Large, the fluorescence intensity of the polymer is bigger, and shows a certain linear relationship.