低氧阻聚巯基-丙烯酸酯体系在上转换粒子辅助近红外光聚合中的应用  

Application of Low Oxygen Inhibition Thiol-acrylate System in Upconversion Particles Assisted Near-Infrared Photopolymerization

作　　者：潘越 杨天庆 胡鹏 桑欣欣 刘仁 PAN Yue;YANG Tianqing;HU Peng;SANG Xinxin;LIU Ren(School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu,P.R.China)

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《影像科学与光化学》2022年第2期203-210,共8页Imaging Science and Photochemistry

摘　　要：氧阻聚效应的存在导致自由基聚合体系表层固化不完全,影响材料综合性能。本文利用巯-烯聚合体系对氧气不敏感这一特点,克服上转换粒子辅助近红外光聚合(UCAP)中丙烯酸酯体系的氧阻聚效应。通过选用硫醇与(甲基)丙烯酸酯类单体,研究上转换粒子(UCPs)添加量、巯基单体结构及含量等对UCAP表层氧阻聚的影响。采用实时红外光谱表征(甲基)丙烯酸酯类单一体系和巯基-丙烯酸酯复配体系的UCAP聚合动力学。利用激光共聚焦显微拉曼成像光谱仪测定固化材料不同深度处的双键转化率。结果表明,当UCPs添加量为2.0wt%,二级硫醇PE-1与丙烯酸酯类单体EM2261组合,巯基官能团摩尔含量为50%时,UCAP聚合涂层的表层双键转化率可达82%,深层转化率超过90%,有效地降低了固化材料表层氧阻聚程度。The presence of oxygen inhibition effect in radical photopolymerization leads to incomplete curing in the surfaces and affects the final performance of cured material. In this work, the insensitivity of thiol-acrylate system to oxygen was introduced into the upconversion particles assisted near-infrared photopolymerization(UCAP) to overcome the oxygen inhibition effect of acrylate system. The effects of the UCPs concentration, the structure and content of thiol monomers on the oxygen inhibition degree were systematically studied by combining thiols with(meth)acrylate monomers. The ATR-FTIR were used to characterize the polymerization kinetics of monocomponent(meth)acrylate and thiol-acrylate systems in UCAP. The double bond conversion at different depths of the cured material was characterized by Confocal Raman Microscopy. The results show that in the mixed system of secondary mercaptan PE-1 and acrylate monomer EM2261 with 2.0 wt% UCPs and 50%-SH molarity, the maximum double bond conversion of 82% was obtained on the surface and over 90% in the deep layer, the oxygen inhibition degree of the surface layer were effectively reduced.

关 键 词：巯-烯聚合 氧阻聚 上转换粒子 近红外光聚合 

分 类 号：TQ316.3[化学工程—高聚物工业]