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首页> 外文期刊>Journal of Applied Polymer Science >Organic-inorganic composite materials as photoinitiator for controlling/living polymerization
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Organic-inorganic composite materials as photoinitiator for controlling/living polymerization

机译：有机-无机复合材料作为光引发剂，用于控制/活化聚合

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摘要

Titanium dioxide (TiO2)/graphitic carbon nitride (g-C3N4) composites were first used as photoinitiator for photochemically mediated controlled/living polymerization of methyl methacrylate. The polymerization was successfully carried out in polyethylene glycol at room temperature with FeCl3 center dot 6H(2)O/N, N, N', N', N ''-pentamethyldiethylenetriamine as complex catalyst and ethyl 2-bromoisobutyrate as initiator in this case. A pseudo-first-order dependence of the monomer concentration on the polymerization time was observed. TiO2/g-C3N4 was verified to be an efficient photoinitiator. The polymerization was controlled to produce poly (methyl methacrylate) with narrow molecular weight distribution and controlled number average molecular weight (M-n,M-GPC). The M-n,M-GPC matched well with the theoretical values when using both UV and sunlight irradiation as light source. The effects of reaction conditions on the polymerization were investigated. The polymerization could be started and stopped through periodically switching on/off the light. The living nature was further supported by the chain extension experiments. (C) 2015 Wiley Periodicals, Inc.
机译：二氧化钛（TiO2）/石墨碳氮化物（g-C3N4）复合材料首先用作光引发剂，用于光化学介导的甲基丙烯酸甲酯的控制/活性聚合。在这种情况下，以FeCl3中心点6H（2）O / N，N，N'，N'，N''-五甲基二亚乙基三胺为络合物催化剂，以2-溴异丁酸乙酯为引发剂，在室温下成功地在聚乙二醇中进行了聚合反应。观察到单体浓度对聚合时间的假一阶依赖性。 TiO2 / g-C3N4被证实是有效的光引发剂。控制聚合以生产具有窄分子量分布和受控的数均分子量（M-n，M-GPC）的聚（甲基丙烯酸甲酯）。当同时使用紫外线和日光照射作为光源时，M-n，M-GPC与理论值非常吻合。研究了反应条件对聚合反应的影响。可以通过定期打开/关闭灯来启动和停止聚合。扩链实验进一步支持了生活的本质。 （C）2015年Wiley Periodicals，Inc.

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