γ辐射对聚乙烯醇溶液凝胶化的影响

Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI:10.1016/0146-5724(85)90031-7

Chen Wenxiu, Bao Huaying, Zhang Manwei

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引用次数: 20

摘要

考察了不同pH值对聚乙烯醇水溶液和有机溶液的辐射效应，以及水溶液中清除剂的辐射效应。凝胶剂量Rg随pH值的变化而变化;体系中少量自由基清除剂抑制聚合物分子交联，提高Rg。聚乙烯醇在醇二甲基砜溶液中的降解发生在辐照后，说明聚乙烯醇水溶液的辐射诱导交联机制是由水的瞬态态H和OH引发的，而不是由e-aq引发的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of gamma radiation on gelation in polyvinyl alcohol solutions

The radiation effect of various pH values on polyvinyl alcohol aqueous solutions and on organic solutions, as well as those of scavengers in the aqueous solutions were examined. The gelation dose R_g changes with various pH values; a small amount of free radical scavengers in the system inhibits the crosslinking of polymer molecules and raises R_g. Degradation of polyvinyl in alcohol dimethyl sulfone solution occurs after irradiation, providing a mechanism of radiation-induced crosslinking of polyvinyl alcohol aqueous solutions is initiated by the transient species H and OH of water, but not the species e^-_aq.

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