12-钨磷酸引发四氢呋喃的阳离子开环聚合。
The cationic ring-opening polymerization of tetrahydrofuran with 12-tungstophosphoric acid.
机构信息
Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
出版信息
Molecules. 2010 Mar 8;15(3):1398-407. doi: 10.3390/molecules15031398.
The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 degrees C was catalyzed by H3PW12O40 x 13 H2O as solid acid catalyst. The effect of the proportions of acetic anhydride and catalyst, reaction time and support on the polymerization reaction was investigated. It has been found that the yield and the viscosity of the polymer depend on the proportion of acetic anhydride, the presence of the latter in the reactant mixture being required for the ring-opening. The catalytic activity of the alumina-supported heteropolyacid results showed that Brønsted acid sites are more effective than Lewis ones for the cationic ring-opening polymerization.
十二磷钨酸氢十三水（H3PW12O40 x 13 H2O）作为固体酸催化剂，在 20°C 下引发四氢呋喃的阳离子开环聚合反应。考察了乙酸酐与催化剂的比例、反应时间和载体对聚合反应的影响。结果表明，聚合物的产率和粘度取决于乙酸酐的比例，反应物混合物中后者的存在对于开环是必需的。负载型杂多酸催化剂的催化活性表明，对于阳离子开环聚合反应，Brønsted 酸位比 Lewis 酸位更有效。
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