摘要
以对苯二甲酸二甲酯 (DMT)、1,4 -丁二醇 (BG)、聚四氢呋喃 (PTMG)为主要原料 ,合成热塑性聚酯弹性体 (TPEE)。考察了反应时间、反应温度、催化剂种类和用量、原料摩尔比、催化剂加入顺序、分馏柱顶部温度对合成TPEE过程中酯交换反应的影响。确定了最佳酯交换反应工艺条件 :BG与DMT摩尔比为 1.7∶1 0～ 2 .0∶1 0 ,催化剂为钛酸四丁酯 ,助催化剂为醋酸镁 ,催化剂用量 0 .2 7g(以 10 0gTPEE计 ,下同 ) ,原料在 15 0℃溶解后加入催化剂和助催化剂 ,反应温度 190～2 0 0℃ ,分馏柱顶部温度 6 5～ 70℃ ,反应时间 30～ 5 0min。
The thermoplastic polyester-ether elastomer(TPEE) was synthesized with dimethyl terephthalate(DMT),1,4-butylene-glycol(BG),polytetrahydrofuran(PTMG) as raw materials. The effects of reaction time and temperature, type and amount of the catalyst used, moler ratio of BG/DMT,adding sequence of catalyst, top temperature of fractional column on transesterification were investigated. The optimun conditions of transesterification were determined as follows:molar ratio of BG/DMT 1.7∶1 0 ～2.0∶1 0 ,tetrabutyl titanate catalyst and magnesium acetate promoter, catalyst amount 0.16 g ,adding catalyst after raw material solubilized at 150 ℃ , reaction temperature 190～200℃ ,top temperature of fractional column 65～70 ℃ ,reaction time 30～50 min .
出处
《精细石油化工进展》
CAS
2003年第8期45-48,共4页
Advances in Fine Petrochemicals
