含二苯甲酮结构水溶性梳状高分子紫外线吸收剂的合成

将2,4-二羟基二苯甲酮(UV-0)、聚乙二醇单甲醚(mPEG)与丙烯酰氯反应合成中间体2-羟基-4-丙烯酸酯基二苯甲酮(2H4ABP)和聚乙二醇单甲醚丙烯酸酯,然后通过自由基溶液共聚合,将聚乙二醇单甲醚丙烯酸酯与2H4ABP、丙烯酸进行共聚合合成了一系列梳状水溶性高分子紫外线吸收剂。采用FT-IR、1H-NMR、UV等手段对产物进行了结构表征。紫外测试结果表明产物在244、291、340 nm处有强紫外吸收,与UV-0相比发生了明显红移。通过分光光度计测定计算了产物的紫外吸收效果残存率并考察了产物的光稳定性,结果表明产物有较好的光稳定性。

Synthesis of Comb Like Water-Soluble High-Molecular Weight Ultraviolet Absorber Containing Benzophenone Groups

2-Hydroxy-4-acrylate benzophenone(2H4ABP) and mPEG methyl ether acrylate were synthesized by 2,4-dihydroxy benzophenone(UV-0) and mPEG with acryloyl chloride.Then,a series of water soluble comb like copolymers poly(acrylic acid)-co-poly(2H4ABP)-co-poly[(ethylene glycol) methyl ether] P(AA-co-2H4ABP-co-mPEG) were synthesized by free radical copolymerize of mPEG methyl ether acrylate with acrylic acid and 2H4ABP.The products were characterized by UV,FT-IR and 1H-NBR.The effect of copolymers with different 2H4ABP contents on the UV-absorption increases with increasing 2H4ABP content.It was found that the products have broad ultraviolet absorptions at about 244,291 and 340 nm,which take on some red shifts in comparison with those of the UV-0.The photostabilities of the products were evaluated via measuring the remanent percentage of UV-absorption.It was found that the products have excellent photostability.