期刊
COLLOID AND POLYMER SCIENCE
卷 287, 期 7, 页码 767-772出版社
SPRINGER
DOI: 10.1007/s00396-009-2023-2
关键词
Photo-living radical polymerization; 4-Methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl; 2,2 '-Azobis(4-methoxy-2,4-dimethylvaleronitrile); Bis(alkylphenyl)iodonium hexafluorophosphate; Methyl methacrylate; Irradiation; Photo-switching ability
The novel photo-living radical polymerization of methyl methacrylate (MMA) was determined using 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile) (AMDV) and 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO) in the presence of bis(alkylphenyl)iodonium hexafluorophosphate (BAI). The polymerization provided a comparatively narrow molecular weight distribution in the range of 1.4-1.7. The resulting PMMA contained no BAI fragments in its structure and had the 1-cyano-1,3-dimethyl-3-methoxybutyl radical and MTEMPO at the 1:1 molar ratio. The experimental molecular weight was in close agreement with the theoretical one when the initiator efficiency was taken into consideration. The plots of ln([MMA](0)/[MMA]) vs. time and the molecular weight of PMMA vs. the conversion and vs. the reciprocal of the initial concentration of AMDV showed linear correlations, indicating that the polymerization proceeded in accordance with a living mechanism. It was found that the polymerization had a photo-switching ability, because the polymerization was interrupted by turning off the irradiation, and then restarted by the irradiation again.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据