摘要
以二苯酮作光敏剂,在紫外光照射下,引发亲水性单体:丙烯酸己磺酸钠,丙烯酰胺接枝于聚醚氨酯膜上。单体结构与反应条件对接枝率均有影响。接枝后膜的溶解性、吸水率以及表面形态比接枝前有显著变化。以二苯酮作光敏剂将丙烯酰胺接枝于聚醚氨酯硬段与软段模型化合物的研究结果表明,氨基甲酸酯中氨基氮上的氢,酯基中以及醚键旁α碳上的氢均可被提取,成为接枝点。
Sodium 6-sulfohexyl acrylate (SSHA) and acrylamide (AAM) were grafted onto segment polyether urethane (SPEU)films under UV light irradiation with benzophenone as photosensitizer. The effect of the structure of monomers and the reaction conditions on the grafting yield was obvious. The formation of graft copolymer was verified by solubility, water absorption and the scanning electron microscopy photographs of the grafted films. In order to clarify the grafting site, graft copolymerization of AAm onto the model compounds of SPEU hard segment and soft segment was investigated. The chemical composition of the graft copolymer was examined by NMR, IR and elemental analysis. The experimental results showed that the grafting sites appear to be at nitrogen of amino group and α-carbon of ether linkage and ester group.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1991年第4期397-405,共9页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
北京中关村地区联合分析测试中心
关键词
二苯酮
聚醚氨酯
接枝
光引发
Photo-induced grafting
Polyetherurethane
Sodium 6-sulfohexyl acrylate
Acrylamide
Benzophenone
