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机构地区:[1]武汉大学化学与分子科学学院,湖北武汉430072 [2]广州天赐高新材料股份有限公司,广东广州510760
出 处:《武汉大学学报(理学版)》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
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.
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
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