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本文介绍了含香豆素基团树形聚丁二烯的树形结构对香豆素基团光致交联性能的影响。香豆素的光二聚及光裂解过程均通过UV-Vis进行监控,交联前后聚合物的分子机理通过GPC进行表征。测试结果表明随聚合物结构致密性增加,香豆素光交联性能变优异;体系中存在“高分子链内/高分子链间交联”共同作用。
In this paper, the effect of the tree structure of the coumarin-containing dendritic polybutadiene on the photocrosslinkability of coumarin groups is introduced. The photodimerization and photolysis of coumarin were monitored by UV-Vis. The molecular mechanism of the polymer before and after crosslinking was characterized by GPC. The results show that with the increase of the compactness of the structure of the polymer, the photocrosslinking properties of the coumarin become excellent. In the system, there exists a synergistic effect of “cross-linking within / between polymer chains”.