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采用实时FTIR研究了二缩三乙二醇二丙烯酸酯的红外光聚合反应动力学。在红外激光照射下 ,引发剂 1,3 ,3 ,1’ ,3’ ,3’ -六甲基 - 11-氯 - 10 ,12 -亚丙基三碳菁—正丁基三苯基硼可以引发二缩三乙二醇二丙烯酸酯的光聚合反应。研究发现 ,随激光功率的提高 ,单体的聚合速度与双键转化率均有显著提高。在 17.0mW /cm2 光强下二缩三乙二醇二丙烯酸酯在 2 0s内双键转化率为 15 % ,聚合速度为 8.4× 10 -3 mol·L-1·s-1,并且初期反应速度与激光功率的 0 .47次方成正比 ,说明光聚合初期遵守双基终止的反应机理。由于分子链柔性的影响 ,同样条件下TEGDA的转化率略高于一缩二乙二醇二丙烯酸酯
The real-time FTIR was used to study the infrared photopolymerization kinetics of triethylene glycol diacrylate. Under the infrared laser irradiation, the initiator 1,3,3,1 ’, 3’, 3’-hexamethyl-11-chloro-10,12-trimethylene tricarbocyanine- Initiation of photopolymerization of triethylene glycol diacrylate. It was found that with the increase of laser power, the polymerization rate of monomer and double bond conversion rate increased significantly. Under the light intensity of 17.0mW / cm2, triethylene glycol diacrylate has a double bond conversion rate of 15% within 20 seconds and a polymerization rate of 8.4 × 10 -3 mol·L -1 · s -1, and the initial reaction The velocity is proportional to the 0.4 power of the laser power, indicating that the reaction mechanism of diradical termination is abided by at the beginning of photopolymerization. Due to the influence of molecular chain flexibility, the conversion of TEGDA under the same conditions is slightly higher than that of diethylene glycol diacrylate