以聚(苯乙烯-丙烯酰胺)载体氯化钕配合物催化合成的聚4-乙烯吡啶及表征

Synthesis and Characterization of Poly(4-vinylpyridine) with Poly(Sytrene-Acrylamde) Supported NdCl3 Complex Catalyst

采用聚(苯乙烯-丙烯酰胺)载体氯化钕配合物催化剂催化合成聚4-乙烯吡啶,研究了Al3+/Nd3+摩尔比、单体浓度、不同类型催化剂、反应时间和温度对聚合活性、单体转化率、相对分子量的影响规律。结果表明,Al3+/Nd3+摩尔比为200、单体浓度为0.25 g.mL-1,聚合时间为5h,聚合温度为50℃,催化活性达到最大。氯化钕配合物的催化活性高于稀土氯化物,聚合物载体氯化钕配合物催化性能高于同类小分子体系配合物。并通过傅里叶变换红外光谱(IR)、核磁共振氢谱(H-HMR)、核磁共振碳谱(13C-HMR)、差示扫描量热分析(DSC)测试手段对4乙烯吡啶聚合物结构进行表征。

Polymerization of 4-vinylpridine was studied with poly（Sytrene-Acrylamde） supported NdCl3 complex catalyst.The influence of Al3＋/Nd3＋（molar ratio）,monomer concentration,reaction time and temperature on catalytic activity,polymer conversion and the molecular weight of poly 4-vinylpridine were investigated.The results indicated that when Al3＋/Nd3＋（molar ratio） was 200,monomer concentration was 0.25 g·mL-1,and reaction time was 5h,the catalyst system exhibited high catalytic activity.The catalytic activity of the rare earth complex is higher than that of simple rare earth chloride.The catalytic activity of polymer-supported catalyst is higher than those of the similar lower molecular system.The obtained polymer was characterized by fourier-t ransform infrared spectroscopy,gel permeation chromatography,proton and 13C nuclear magnetic resonance and differential scanning calorimetry.