Inhibitory effect of H_{3 + x}PMo_{12 ∿x}V_xO₄₀-T on the self-polymerization of methyl methacrylate

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• 作者：Yan-Bing Yin^a ; ^{yinyanbing70@163.com" class="auth_mail" title="E-mail the corresponding author} ; Hui-Song Wang^a ; Yu-Lin Yang^b ; ^{ylyang@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Rui-Qing Fan^b ; Guo-Hua Dong^a ; ^b ; Li-Guo Wei^c
• 关键词：Molybdovanadophosphoric heteropoly acid Quaternary ammonium salt ; Methyl methacrylate ; Differential scanning calorimetry ; Cyclic voltammograms ; Inhibition effect
• 刊名：Chinese Chemical Letters
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：27
• 期：4
• 页码：613-618
• 全文大小：666 K

文摘

In this work, a series of molybdovanadophosphoric heteropoly acid quaternary ammonium salts (H_3 + xPMo_12 − xV_xO₄₀-T) were synthesized and employed as a reaction inhibitor in the self-polymerization of methyl methacrylate (MMA). The polymerization inhibition effect of H_3 + xPMo_12 − xV_xO₄₀-T with different number of vanadium atoms and reaction dosages was investigated using differential scanning calorimetry (DSC). It shows that the inhibitory effect was improved with the increasing dosages of H_3 + xPMo_12 − xV_xO₄₀-T, and the polymerization inhibition was also affected by the number of vanadium atoms in the H_3 + xPMo_12 − xV_xO₄₀-T. Furthermore, cyclic voltammograms (CV) was used to probe the mechanism of the inhibition reaction with H_3 + xPMo_12xV_xO₄₀-T. The result of CV indicates that the inhibition reaction is an oxidation–reduction reaction. H_3 + xPMo_12 − xV_xO₄₀-T can react directly with the MMA monomer radicals, which eliminated the MMA monomers, and therefore the self-polymerization of the MMA can be effectively inhibited by H_3 + xPMo_12 − xV_xO₄₀-T.