摘要
介绍了用于CO2与环氧化物共聚合成可生物降解的聚碳酸酯的Salen型催化剂的研究进展情况,重点介绍了含有不同金属的单核、双核的Salen型催化剂,并对各催化剂在不同的反应底物浓度、CO2压力、反应温度、反应时间、助催化剂类型及用量等条件下的催化性能以及聚碳酸酯的结构进行了比较,得出轴向配体的电负性越大,催化剂活性越强的结论。另外,降低反应温度、升高CO2压力都有利于生成品质更优的聚碳酸酯。指出催化剂结构如何有效控制聚碳酸酯的微观结构及构-效关系是今后重要的研究方向之一。
The progress in the research ofSalen-type catalysts for the synthesis of biodegradable polycarbonates by copolymerization of CO2 and epoxide was reviewed,and mononuclear and binuclear Salen catalysts containing different metals were emphatically introduced.Under different reaction conditions (substrate concentration,CO2 pressure,reaction temperature,reaction time and the types and dosage of cocatalysts),the catalytic activity ofvarious kinds of catalysts and the number-average molecular weight,microstructure and polymer dispersity indexof the prepared polycarbonatesare compared.It is concluded that the greater the electronegativity of the axial ligand,the stronger the activity of the catalyst.Moreover,lowering reaction temperature and increasing CO2 pressure are beneficial to the synthesis of high-quality polycarbonate.The further research of the structure of catalysts in order toeffectively control the microstructure of polycarbonate is one of the future research directions for the copolymerization of CO2 and epoxide .
作者
夏力
王文珍
李磊磊
樊维
韩薇莉
XIA Li;WANG Wenzhen;LI Leilei;FAN Wei;HAN Weili(College of Chemistry & Chemical Engineering,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2019年第4期109-118,共10页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
陕西省自然科学基础研究计划(2019JZ-44)
陕西省教育厅自然科学基础研究计划(2017JQ2009)
西安石油大学研究生创新与实践能力培养项目(YCS17211011)
