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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。
Poly (4-vinylpyridine) was synthesized by using poly (styrene-acrylamide) supported neodymium chloride complex catalyst. The effect of Al3 + / Nd3 + molar ratio, monomer concentration, different types of catalysts, reaction time and temperature on the polymerization activity, Conversion rate, the impact of molecular weight rules. The results showed that the molar ratio of Al3 + / Nd3 + was 200, the monomer concentration was 0.25 g.mL-1, the polymerization time was 5h and the polymerization temperature was 50 ℃. The catalytic activity of neodymium chloride complex is higher than that of rare earth chloride. The catalytic performance of the polymer carrier neodymium chloride complex is higher than that of the similar small molecule system complexes. The structure of 4-vinyl pyridine polymer was characterized by Fourier transform infrared spectroscopy (IR), nuclear magnetic resonance (H-HMR), nuclear magnetic resonance (13C-HMR) and differential scanning calorimetry (DSC) Characterization.