| 李家其.钒钼协同作用下杂多酸催化阻聚甲基丙烯酸甲酯[J].分子催化,2013,(5):439-444 |
| 钒钼协同作用下杂多酸催化阻聚甲基丙烯酸甲酯 |
| Catalytic Inhibition of Heteropoly Acid on Polymerization of Methyl Methacrylate Affected by the Synergsic Action of Vanadium and Molybdenum |
| 投稿时间：2013-07-04 修订日期：2013-08-30 |
| DOI： |
| 中文关键词: 钒钼 协同 杂多酸 催化阻聚 甲基丙烯酸甲酯. |
| 英文关键词:Vanadium and Molybdenum Synergism Heteropoly acid Catalytic inhibition Methyl methacrylate. |
| 基金项目:化学生物学及中药分析教育部重点实验室基金资助项目 |
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| 中文摘要: |
| 利用一锅法制备了Dawson型钨磷酸和钼钒磷酸，并用红外光谱和X-射线衍射表征了其结构。采用沸腾法研究了合成的杂多酸对甲基丙烯酸甲酯（MMA）的催化阻聚性能，考察了杂多酸结构、杂多酸用量和反应温度等因素对MMA本体聚合反应的影响。结果表明：钒钼元素在杂多酸催化阻聚MMA的反应中具有明显的协同作用，而且，杂多酸对MMA的催化阻聚作用随钒原子数的增加而增强，杂多酸的用量和反应温度对MMA自聚反应的速率影响较大。在过氧化苯甲酰（BPO）为0.04 g，MMA为 10 mL，H9P2Mo15V3O62 质量为MMA 的万分之六，反应温度为101.2 ℃ 或H9P2Mo15V3O62 质量为MMA 的万分之三，反应温度为89.4 ℃ 时，MMA自聚反应被抑制。与传统含酚阻聚剂相比，Dawson型钼钒磷酸具有阻聚效果好、后处理简单、无腐蚀和污染问题等优点，能够作为MMA的阻聚剂使用。 |
| 英文摘要: |
| The Dawson-type molybdophosphoric and molybdovanadophosphoric acids were synthesized via the one-pot process and characterized by IR and X-ray power diffraction. The inhibition effects of the heteropoly acids for the polymerization of methyl methacrylate (MMA) were investigated by ebullition method and effects of the heteropoly acid structure、H9P2Mo15V3O62 dosage and reaction temperature on the reaction were tested. The results showed that the catalytic Inhibitions of heteropoly acid on the polymerization of MMA were affected by the synergsic action of vanadium and molybdenum. Moreover, the inhibition effects of the heteropoly acid for the polymerization of MMA increased with the increasing of the amounts of vanadium in the heteropolyacid molecules. The dosage of the heteropoly acid and the reaction temperature had significant effect on the rate of MMA polymerization.The polymerizations were prohibited when the dosage of benzoyl peroxide (BPO) was 0.04 g，MMA was 10 mL, mass ratio of H9P2Mo15V3O62 to MMA was 6:10000 g, the reaction temperature was 101.2 ℃ or mass ratio of H9P2Mo15V3O62 to MMA was 3:10000 g, reaction temperature was 89.4 ℃. Compared with using phenol as catalyst,the catalyst can be used for inhibition of the polymerization of MMA characterized by process simplification,higher efficiency and no corrosion for facilities. |
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