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研究了在365nm的紫外光照射下,芴酮-苯胺体系引发甲基丙烯酸甲酯光聚合的反应动力学和机理。在高吸光度时,聚合速度下降,聚合物的分子量升高且分布变宽。用自旋捕捉和电子顺磁共振相结合的方法证明引发过程产生了胺自由基。聚合物的荧光光谱表明胺自由基引发了聚合反应。还讨论了溶剂极性对聚合反应的影响。
The kinetics and mechanism of the photopolymerization of methyl methacrylate initiated by fluorenone-aniline system under 365nm UV irradiation were studied. At high absorbance, the rate of polymerization decreases, the molecular weight of the polymer increases, and the distribution becomes broader. The combination of spin catalysis and electron paramagnetic resonance proves that the priming process produces amine free radicals. The fluorescence spectrum of the polymer indicates that the amine radical initiated the polymerization reaction. The effect of solvent polarity on the polymerization reaction was also discussed.