摘要
由CO2 氧化环己烯 (CHO)配位催化共聚制得高Tg 的脂肪族聚碳酸亚环己基酯 ,并用IR、NMR和DSC等进行了表征 ,用TG对聚合物的热稳定性进行分析 .加入环氧丙烷 (PO)三元共聚并分析PO/CHO摩尔比对Tg 的影响 .
Aliphatic poly(cyclohexene carbonate),which has a T g of 120℃,was sythesized by coordinate\|catalytical copolymerization of carbon dioxide and cyclo\|hexene oxide(CHO) with polymer\|supported bimetallic catalyst (PBM) and was characterized by IR,NMR and DSC measurements.The thermal degradation of copolymers was studied by TG measurement,and found that 5% and 50% weight loss temperature ( t 5% , t 50% ) were 177℃,273℃,respectively.The copolymerization of CO\-2,cyclohexene oxide (CHO) and propylene oxide (PO) was also studied to evaluate the influence of mole percentage of cyclohexene oxide (CHO) on T g.“End capping”can raise t 5% to 210℃.The copolymerization of CO\-2,cyclohexene oxide (CHO) and phenyl isocyanate (PI) can increase the intrinsic viscosity (\[ η ]) but decrease the T g. [WTHZ]
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2000年第6期741-745,共5页
Acta Polymerica Sinica
基金
国家自然科学基金!(基金号 2 93412 0 )
关键词
二氧化碳
氧化环己烷
共聚
聚碳酸亚环己基酯
Carbon dioxide, Cyclohexene oxide, Propylene oxide, Copolymerization, Glass transition temperature, Thermostability
