摘要
通过笼型八氯丙基倍半硅氧烷(POSS-Cl)与4-羟基二苯甲酮(HBP)的反应得到一种新型夺氢型大分子光引发剂(POSS-HBP),利用磁共振谱和红外光谱对其分子结构进行表征.通过实时红外光谱比较研究了光引发剂HBP与POSS-HBP在紫外光照下引发1,6-已二醇二丙烯酸酯(HDDA)的聚合性能.同时,分别考察了POSSHBP和供氢体N,N-二甲基苯胺(DMA)的浓度对HDDA光聚合速率的影响,当POSS-HBP的质量分数为1.0%(以HBP计),供氢体(DMA)的质量分数为3.0%时,HDDA的光聚合只需要8s,较相同情况下HBP光引发聚合缩短了4s.同时,该聚合材料还具有抗黄变及基本无气味等优点.
A novel hydrogen-abstracting macromolecular photoinitiator POSS（polyhedral oligomeric silsesquiox- ane）-HBP was successfully synthesized by the substitution reaction of octakis （3-chloropropyl）octasilsesquioxane （POSS-C1） and 4-hydroxybenzophenone （HBP） and was characterized by FT-IR, 1 H NMR and 13C NMR. The photopolymerizations of 1,6-hexanediol diacrylate （HDDA） initiated by HBP and POSS-Ht3P were studied by the real-time infrared spectroscopy （RT-IR）. Meanwhile, the effects of POSS-HBP and dimethylaniline （DMA） concentration on photopolymerization rate were also investigated, respectively. When the concentration of the POSS-HBP was 1.0 （calculated by the mass of HBP） and the concentration of the hydrogen donor （DMA） was 3.00//00, not only the photopolymerization rate was faster than that of HBP with the same concentration （For complete polymerization of HDDA, HBP took 12 s, but POSS-HBP only took 8 s）, but also the obtained materials had the features of anti-yellowing and almost odorless. The results showed that POSS-HBP was the more efficient photoinitiator than HBP.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2015年第1期67-72,共6页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金(20844005)资助项目
关键词
大分子光引发剂
多面体低聚倍半硅氧烷
4-羟基二苯甲酮
光聚合
macromolecular photoinitiator
polyhedral oligomeric silsesquioxane （POSS）
4-hydroxybenzophenone
photopolymerization
