摘要
采用碳酸二甲酯(DMC)和1,6-己二醇(HD)为原料,三乙烯二胺为催化剂,通过酯交换反应合成了聚(碳酸1,6-己二醇)酯二醇(PHCDL)。考察了反应条件对该过程的影响,得到了最优合成工艺条件:当三乙烯二胺的用量为1,6-己二醇(HD)的0.026%,常压下160℃反应3 h,然后180℃减压反应8h,得到目的产物PHCDL。三乙烯二胺为Lewis碱,该缩聚反应被推断为通过碱催化的醇解反应来完成的。
The process of synthesis of poly （1, 6-hexanediol） carbonate diols （PHCDL） in the presence of triethylenediamine as catalyst was studied. The whole reaction can be divided into three steps. Triethylenediamine is evidenced to be an effective catalyst for the first step. The content of the catalyst has a great effect on the rate of reaction and the optimum dosage of triethylenediamine is 0. 026% by mass of 1,6-hexanediol （HD）. The appropriate temperature in the step under atmospheric pressure is 160 ℃. Subsequent vacuum polymerization is essential in order to obtain aimed product with desired molecular weight. As a Lewis base, the role played by triethylenediamine and possible reaction pathway is reasonably proposed.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第5期28-31,共4页
Polymer Materials Science & Engineering
基金
中科院山西煤化所知识创新工程领域前沿项目(青年基金)(06SC611611)
山西省太原市科技发展计划大学生创新创业专项资助
关键词
聚碳酸酯二醇
碳酸二甲酯
三乙烯二胺
合成
机理
polycarbonate diols
dimethyl carbonate
triethylenediamine
synthesis
mechanism
