论文部分内容阅读
制备了MCM-41负载戊二酸锌催化剂(ZnGA/MCM-41),并采用热重分析、红外光谱和X射线衍射对催化剂进行了表征。结果表明,ZnGA与载体间存在相互作用,ZnGA能以更小的粒径均匀分散到MCM-41的表面。实验研究表明,该催化剂对于CO2与环氧丙烷(PO)共聚反应显示出较高的催化效率,并得到高分子量的聚碳酸亚丙酯(PPC);通过调节负载量和催化剂的用量,最高催化效率达到了89.5g聚合物/g ZnGA;共聚产物的红外光谱和核磁数据表明,所得共聚产物具有接近完全交替(>97.4%)的碳酸酯结构。
The MCM-41 supported zinc glutarate catalyst (ZnGA / MCM-41) was prepared and characterized by TG, FT-IR and X-ray diffraction. The results show that there is an interaction between ZnGA and support, and ZnGA can be uniformly dispersed to the surface of MCM-41 with a smaller particle size. Experimental studies have shown that the catalyst shows high catalytic efficiency for the copolymerization of CO2 with propylene oxide (PO), and high molecular weight polypropylene carbonate (PPC) is obtained. By adjusting the loading and the amount of catalyst, the highest catalysis The efficiency reached 89.5 g polymer / g ZnGA; the infrared spectrum and NMR data of the copolymer showed that the obtained copolymer had near perfect alternation (> 97.4%) of carbonate structure.