以叔丁醇为主螯合剂,乙二胺四乙酸(EDTA)、二乙烯三胺五乙酸(DTPA)、氮川三乙酸(NTA)为共螯合剂,制备了一系列双金属氰化物络合催化剂(DMC)。利用FT-IR、XRD、XPS、SEM对催化剂的结构和形态进行表征分析。结果表明,螯合剂的加入使DMC催化剂的结晶性变差、无定型比例提高;通过添加共螯合剂(EDTA、DTPA、NTA)达到改变立方体结构、提高非结晶度、增加无定型比例、提高催化剂的活性。DTPA作为共螯合剂改性后的DMC-DTPA催化剂结晶度最差,更趋向于无定型状态,单位时间聚合物黏度最大为0.45 cSt,催化活性更优。

A series of bimetallic cyanide complexing catalysts are prepared by using tert-butanol as main chelating agent,and ethylene diamine tetra-acetic acid (EDTA),diethylenetriamine penta-acetic acid (DTPA) and nitrilotriacetic acid (NTA) as co-chelating agents.The structure and morphology of the catalysts are characterized and analyzed by means of FT-IR,XRD,XPS,and SEM.It is verified that the addition of chelating agents results in poorer crystallinity and higher amorphous ratio of the catalysts.The purpose of changing the cubic structure,increasing the amorphousness degree,increasing the amorphous proportion and improving the activity of the catalysts is achieved through adding co-chelating agents (EDTA,DTPA,NTA).Results show that the catalyst prepared with DTPA as a co-chelating agent has the worst crystallinity,more tendency to amorphous state,the maximum polymer viscosity of 0.45 cSt per unit time,and better catalytic activity.

蔡文杰(1997-),男,硕士生,研究方向为工业催化及聚醚的合成,1296517102@qq.com;张竞(1981-),男,博士,教授,研究方向为先进聚合物复合材料及生物基聚合物材料,通讯联系人,zhangjingyz@cczu.edu.cn。