中文摘要：

采用实时红外法（Real time infrared spectrum，RTIR）详细研究了光引发剂及活性单体对光敏有机硅聚氨酯丙烯酸酯（Polysiloxane urethane acrylate，PSUA）体系的光聚合性能的影响。研究发现，断裂型光引发剂的引发效率要高于夺氢型的光引发剂的引发效率，其中Irgaeure 1700引发体系的聚合速率最快。光引发剂最佳用量为0．5％～1％。体系的双键转化率随单体官能度的增加而降低。含单体HEA和IBOA的感光体系的双键转化率最大，基本完全聚合；而含TPGDA和HDDA的体系的双键转化率大约在90％～95％之间；含TMPTA的体系的双键转化率只有80％左右。含不同活性单体体系的双键转化速率的大小顺序为：TPGDA≈HDDA〉HEA〉TMPTA〉IBOA，体系的双键转化率和双键转化速率都随着单体含量的增加而减小。

英文摘要：

The influence of photoinitiators and monomers on photopolymerization property of photosensitive polysiloxane urethane acrylate oligomer （PSUA） was investigated by real time Infrared spectroscopy （RTIR）. The resuits show that initiating efficiency of cleavage photoinitiators is higher than that of abstraction-hydrogen photoinitiators and polymerization rate of the PSUA system using Irgacure 1700 as photoinitiator is the highest. The optimum concentration of photoinitiator 1173 has been determined to be 0.5 %-1%. Doable bond conversion of PSUA system decreases with increment of functionality of added monomer. Double bond conversion of PSUA system containing HEA or IBOA is higher than that containing TPGDA or HDDA （90 %-95 %） and former are polymerized almost completely meanwhile the one containing TMPTA only reaches nearly 80 %. Polymerization rate of the PSUA systerns containing different monomers increases in the following order： TPGDA≈HDDA〉HEA〉TMPTA〉IBOA. Both of doable bond conversion and polymerization rate of PSUA system decrease with increment of monomer concentration.