摘要
以4-甲基二苯甲酮和2-甲基丙烯酸为原料合成了可聚合光引发剂4-(2-甲基丙烯酰氧基)甲基二苯甲酮(4-MAMBP),利用核磁共振仪和紫外吸收光谱进行了表征;选取三羟甲基丙烷三丙烯酸酯(TMPTA)曝光聚合,利用铅笔硬度法测试了固化膜的硬度;运用实时红外(RT-IR)进行光聚合反应动力学研究,考察了单体、光强及引发剂浓度对聚合引发速率及单体转化率的影响,并对固化膜中引发剂残留量进行测定。结果表明:随着光强的增大,单体的双键转化率和聚合速率都增加;二官能度单体的双键转化率和聚合速率高于多官能度单体。4-MA-MBP的质量分数从0.2%增加到1.4%时,单体的双键转化率和聚合速率都明显增加,诱导期缩短,继续增加到1.8%时,双键转化率和聚合速率反而下降;由于可交联在固化膜中,4-MAMBP在固化膜中的残留远低于二苯甲酮。
4-（2-methacryloxy）methylbenzophenone（4-MAMBP）,a highly efficient polymerizable photo-initiator,was synthesized with 4-methylbenzophenone and 2-methylpropenoic acid,which was characterized by 1HNMR and UV absorption spectra.The hardness of TMPTA cured film was measured by pencil hardness test.Real time infrared spectroscopy（RT-IR） was applied to investigate the effects of different monomer system,various light intensity and concentration of photo-initiator on the polymerization kinetics.Finally,the photo-initiator residual of the cured film was determined.The results indicate that with the increment of light intensity,the rate of polymerization（Rp） and fi-nal double bond conversion will increase.The double bond conversion and Rp of difunctional monomer is higher and faster than that of multifunctional monomer.While the concentration of 4-MAMBP increases from 0.2% to 1.4%,the monomer＇s double conversion and polymerization rate will obviously increase and make the induction period short-ened.However,with increment of 4-MAMBP concentration to 1.8%,double conversion and polymerization will de-crease.The photo-initiator residual of 4-（2-methacryloxy）-methylbenzophenone is much lower than that of BP for its crosslinking in the cured film.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2012年第4期209-214,共6页
Journal of Radiation Research and Radiation Processing
基金
常州大学校基金(czuyj0012)资助
