钛酸四异辛酯催化制备共聚型聚碳酸酯二元醇  

Preparation of Copolycarbonate Diols Catalyzed by Tetraisooctyl Titanate

作　　者：张陆军 秦瑜 郝旭东[1] 王金良[1] 曹少魁[2] ZHANG Lujun;QIN Yu;HAO Xudong;WANG Jinliang;CAO Shaokui(Institute of Chemistry Co.Ltd.,Henan Academy of Sciences,Zhengzhou 450002,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南省科学院化学研究所有限公司,郑州450002 [2]郑州大学材料科学与工程学院,郑州450001

出　　处：《河南科学》2021年第7期1068-1072,共5页Henan Science

基　　金：河南省科学院基本科研业务费项目(200603017);河南省科学院助推科技成果转化项目(200203006,200203020)。

摘　　要：采用碳酸二甲酯(DMC)、1,5-戊二醇(PDO)和1,6-己二醇(HDO)为原料、有机钛为催化剂,通过酯交换反应合成共聚型聚碳酸酯二元醇.研究了有机钛催化剂种类、催化剂用量、反应物物质的量的比和反应温度等主要因素对反应过程的影响,优化出最佳合成工艺.实验结果表明,选择钛酸四异辛酯(Ti(OC_(8)H_(17))_(4))为催化剂,催化剂用量为原料总量的0.01%(质量分数),n(DMC)∶n(PDO)∶n(HDO)=(2.5~2.55)∶1∶1,聚合反应温度为200℃,能够制备出数均分子量为2000 g/mol左右和收率为95%以上的目标产物.该聚合物状态为无色透明黏性液体,分子结构通过红外光谱(FTIR)和核磁共振氢谱(~1H-NMR)等分析方式进行了表征.Copolycarbonate Diols was synthesized by the transesterification reaction between dimethyl carbonate and a mixture of 1,5-pentanediol and 1,6-hexanediol in the presence of tetraisooctyl titanat as a catalyst.The effects of main reaction conditions,such as the different species and dosages of metal-based catalysts,molar rations of reactants and reaction temperatures on the reaction process were studied.The experiment results show that the desired polymer is successfully prepared under the conditions of Ti(OC_(8)H_(17))_(4) accounting for 0.01%mass fraction of the total raw materials,molar ration for n(DMC)∶n(PDO)∶n(HDO)=(2.5~2.55)∶1∶1,polymerization temperature for 200℃.The copolycarbonate diols has a number average molecular weight of 2000.The molecular structure of the polymer whih is colorless transparent viscous liquid is determined by 1 H-NMR and FTIR.

关 键 词：聚碳酸酯二元醇 钛酸四异辛酯 共聚 酯交换反应 碳酸二甲酯 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]