摘要
研究了乙酰丙酮盐催化碳酸乙烯酯（EC）和丁二酸二甲酯（DS）耦合反应合成聚丁二酸乙二酯（PES）预聚体和碳酸二甲酯（DMC）的新工艺。结果表明,乙酰丙酮氧钛对EC和DS耦合反应的催化效果最好。并以乙酰丙酮氧钛为催化剂考察了反应温度、催化剂用量、物料配比、反应时间对耦合反应的影响,得到最佳的工艺条件：反应温度225℃~235℃,n（EC）=0.23 mol,n（DS）=0.1 mol,n（cat）=3.3mol,反应时间3h。在该工艺条件下,DMC收率51.3%,PES预聚体的特性黏数0.1358。
A technology of simultaneous synthesis of poly（ethylene succinate） oligomers and dimethyl carbonate was obtained by coupling reaction of ethylene carbonate and dimethyl succinate through various metal acetylacetone catalysts.The results show that the titanium（IV） oxide acetylacetonate catalyst exhibits the highest activity in this coupling reaction.Under this catalyst,the effects of material ratio,reaction temperature,reaction time,the amount of titanium（IV） oxide acetylacetonate catalyst on the coupling reaction of ethylene carbonate and dimethyl succinate were investigated.The preferable reaction conditions were as followed： the reaction temperature 225 ℃～235 ℃,the molar of dimethyl succinate 0.1 mol,the molar ethylene carbonate of 0.23 mol,and the titanium（IV） oxide acetylacetonate catalyst 3.3 mmol,reaction time 3h.Under the selected reaction conditions,the yield of dimethyl carbonate is 51.3%,intrinsic viscosity of polyethylene succinate is 0.1358 dL/g.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2012年第4期14-17,共4页
Polymer Materials Science & Engineering
基金
国家科技支撑计划(2011BAZ03281)
