聚乙烯基咪唑类杂多化合物催化剂的合成及其酯化反应性能研究

Study on the Synthesis of Heteropolyanion-based Polyvinyl Imidazoles Hybrid Catalyst and its Catalytic Performance for Esterification Reaction

合成了一系列聚乙烯基咪唑类杂多化合物,并作为多相催化剂用于己二酸与正丁醇的酯化反应。采用XRD、FT-IR、TG、元素分析等分析测试技术对催化剂的结构与组成进行表征,结果表明,该催化剂具有良好的热稳定性,杂多阴离子与聚合物中的离子单元通过离子键结合而高度分散在聚合物表面,并且维持了杂多阴离子的Keggin结构。含-SO3H基团的催化剂Poly(VMPS)-H2PW具有优良的催化活性、重复使用性和结构稳定性。

A series of heteropolyanion -based polyvinyl imidazoles hybrid catalysts are synthesized as heterogeneous catalysts to effectively catalyze the esterification of adipic acid with n -butanol and characterized by XRD, FT- IR, TG and elemental analysis. The results indicate that the catalysts have high thermal stability. The poly （founctionalized imidazolium） organic cations are coupled with heteropolyanions via ionic bonds and the heteropolyanions are highly dispersed on the polymer cations surface and the Keggin - structure of heteropolyanions in the hybrid catalysts is remained. The SO3H -functionalized hybrid catalyst Poly（VMPS） -H 2PW exhibits high catalytic activity, good structure stability and reusability.