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Sulfonation of Styrene-Grafted Poly(vinylidene fluoride) Films

机译:苯乙烯接枝的聚偏二氟乙烯薄膜的磺化

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摘要

Electron-beam irradiated and styrene-grafted poly(vinylidene fluoride) films are sulfonated with chlorosulfonic acid in dichloroethane under various conditions. The impact of the reaction time, the concentration of the sulfonating agent, and the reaction temperature on the properties of the sulfonated film is examined. Sulfonation proceeds via a reaction front mechanism. Sulfonation of surface-grafted films is incomplete at room temperature. The number of side reactions taking place appears to be linearly dependent on the concentration of the sulfonation solution. Dimensional changes suggest that sulfone crosslinking is significant at higher concentrations. This reduces the ion-exchange capacity and proton conductivity of the films but increases the resistance to oxidation in a H_2O_2 solution.
机译:在各种条件下,在二氯乙烷中用氯磺酸将电子束辐照和苯乙烯接枝的聚偏二氟乙烯薄膜磺化。研究了反应时间,磺化剂的浓度和反应温度对磺化膜性能的影响。磺化通过反应前沿机制进行。表面接枝膜的磺化在室温下是不完全的。发生的副反应的数量似乎线性地取决于磺化溶液的浓度。尺寸变化表明砜交联在较高浓度下很明显。这降低了膜的离子交换能力和质子传导性,但增加了在H_2O_2溶液中的抗氧化性。

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