8-丙烯酰氧喹啉及其聚合物与四溴化碳双组分体系敏化的丙烯腈光聚合

我们曾报道过8-丙烯酰氧喹啉本身在光照下可以聚合;8-丙烯酰氧喹啉(AQ)及其聚合物(PAQ)的喹啉环上的氮原子可以和双键缺电子单体如丙烯腈(AN)在紫外光下能形成激基复合物引发AN的光聚合,并且通过荧光分析证明AQ或PAQ还参与AN聚合物链中,含有氮杂环的烯类单体如N-乙烯基咔唑等不仅和缺电子化合物,和一些卤代烷如CCl_4、CBr_4等在激发下也可以形成激基复合物,进而可以引发烯类单体聚

PHOTOPOLYMERIZATION OF ACRYLONITRILE SENSITIZED BY BINARY COMPONENT INITIATORS CONSISTING OF 8-ACRYLOYLOXYQUINOLINE OR ITS POLYMER WITH CARBON TETRABROMIDE

Photopolymerization of acrylonitrile (AN) sensitized by binary component initiators consisting of 8-acryloyloxyquinoline (AQ) and its polymer (PAQ) with carbon tetrabromide (CTB) are investigated kinetically. It is found that the polymerization rates are proportional to 0.19th power of AQ concentration, 0.35th power of CTB concentration and 0.62th power of AN concentration for AQ-CTB system initiation system; proportional to 0.24th power of PAQ concentration, 0.22th power of CTB concentration and 1.0th power of AN concentration for PAQ-CTB initiation system. The overall activation energies for AN photopolymerization initiated by above systems are obtained to be 5.26 Kcal/mol and 6.34 Kcal/mol respectively. It is also found that the polymerization rates sensitized by addition of CTB to AQ or PAQ are much higher than that of AQ or PAQ alone. From the fluorescence analysis of AN polymers, it is confirmed that AQ or PAQ joints into the AN polymer chains.The molecular weight of PAN sensitized by the binary initiator systems is lower than that of AQ or PAQ sensitized.