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本文研究了硫杂蒽酮(TX)/三乙胺(TEA)/氧体系引发甲基丙烯酸甲酯(MMA)光聚合的动力学及影响聚合速度的各种因素。结果表明,聚合速度和[TX]~0.1[TEA]~0.3及[MMA]成正此,同时,由于TX的nπ~*和ππ~*激发态能级接近,溶剂的性质对聚合速度有显著的影响。体系中的氧对聚合反应有明显的加速作用,特别在硬脂酸存在时,使量子收率增加2.3倍。
In this paper, the kinetics of photopolymerization of methyl methacrylate (MMA) induced by thioxanthone (TX) / triethylamine (TEA) / oxygen system and various factors affecting the polymerization rate were studied. The results show that the polymerization rate is proportional to [TX] ~ 0.1 [TEA] ~ 0.3 and [MMA], and the nature of the solvent has a significant effect on the polymerization rate due to the close approximation of the excited states of nπ ~ * and ππ ~ * of TX influences. Oxygen in the system significantly accelerates the polymerization, particularly in the presence of stearic acid, which increases the quantum yield 2.3-fold.