温度对1,6-己二醇二丙烯酸酯紫外光聚合的影响  

Temperature effect on UV-photopolymerization of 1,6-hexanediol diacrylate

作　　者：高虹[1] 聂俊[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《辐射研究与辐射工艺学报》2006年第5期289-292,共4页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金(50473024);湖北省科技攻关基金(2004AA303B03)资助

摘　　要：对在低温下呈固态的1,6-己二醇二丙烯酸酯体系进行紫外光辐照,并用近红外光谱技术研究聚合体系的光聚合及后固化行为,用顺磁共振光谱技术证明后固化过程自由基的衰竭现象,从而探讨1,6-己二醇二丙烯酸酯在固态下进行紫外光聚合的聚合动力学。实验发现固态1,6-己二醇二丙烯酸酯体系可以进行光聚合,并伴有后固化现象;升高反应温度可提高双键转化率;引发剂1173的含量对体系聚合程度有较大影响。Generally, the temperature had great influence on the photopolymerization kinetics. However, few attentions were paid to the photopolymerization induced at low temperature. In this study, the solid-state system of 1, 6-hexanediol diacrylate （HDDA）/2-hydroxyl-2-methyl- 1- phenyl-propane- 1-one （1173 ） was photopolymerized at low temperature, the near infrared spectroscopy （NIR） and electron spin resonance （ESR） were employed to monitor the photopolymerization kinetics and the post-curing reaction of this system. Although the solid-state 1, 6-hexanediol diacrylate could be photoinitiated by 1173, the double bond conversion was low. The post-curing reaction could improve the double bond conversion. And the free radical was still alive after 4 h when light turned off. The photopolymerization kinetics was greatly affected by polymerization temperature. Increasing the curing temperatures caused the increase of the double bond conversion. The optimum concentration of 1173 was 0.4% for reaching high rate of polymerization and double bond conversion. However, the excessive photoinitiator decreased the rate of polymerization and double bond conversion.

关 键 词：1 6-己二醇二丙烯酸酯 固态 光聚合 后固化 

分 类 号：O434.2[机械工程—光学工程] Q323.5[理学—光学]