乙酸氧钛催化酯化缩聚法合成聚丁二酸乙二醇酯及其性能研究  

Study on synthesis and properties of poly(ethylene succinate)by esterification polycondensation catalyzed by titanyl acetate

作　　者：李振超 魏东 苗庆 王明亮 魏忠[1,2] 王自庆 宋晓玲 LI Zhenchao;WEI Dong;MIAO Qing;WANG Mingliang;WEI Zhong;WANG Ziqing;SONG Xiaoling(School of Chemistry and Chemical Engineering,Shihezi University,Shihezi 832001,Xinjiang,China;Xinjiang Tianye(Group)Co.,Ltd.,Shihezi 832001,Xinjiang,China)

机构地区：[1]石河子大学化学化工学院,新疆石河子832001 [2]新疆天业(集团)有限公司,新疆石河子832001

出　　处：《低碳化学与化工》2024年第2期60-66,共7页Low-Carbon Chemistry and Chemical Engineering

基　　金：新疆生产建设兵团区域创新引导计划(2022BB003);中国博士后科学基金(2022MD713812);八师石河子市揭榜挂帅重大科技计划项目(2022JB02)。

摘　　要：聚丁二酸乙二醇酯(PES)作为一种脂肪族聚酯,具有良好的力学性能和全生物降解特性,在降解塑料领域具有广阔的应用前景。以溶剂热法制备了一种乙酸氧钛化合物,将其作为催化剂用于催化丁二酸(SA)和乙二醇(EG)酯化缩聚合成高分子量PES。系统考察了催化剂用量(催化剂占反应物料的质量分数,下同)、反应温度和反应时间对PES分子量的影响,采用^(1)H-NMR和^(13)C-NMR对PES的结构进行了表征,并对其热性能、热稳定性和力学性能进行了测试。结果表明,当催化剂用量为0.6%,在230℃下聚合8 h时,合成的PES的特性黏度[η]为0.78,数均分子量(Mn)为47500,对应的聚合物分散性指数(PDI)为2.66。合成的PES熔点为102.4℃,最大热分解温度为420.2℃,断裂伸长率为505%±5%,拉伸应力为(48.3±0.6)MPa,拉伸弹性模量高达358.8 MPa。以煤制乙二醇为单体合成PES不但可以实现全生物降解聚合物的低成本制备,而且对煤化工产业的高质量发展有重要的现实意义。As an aliphatic polyester,poly(ethylene succinate)(PES)has good mechanical properties and full biodegradability,which has broad application prospects in the field of degradable plastics.Titanyl acetate was prepared by solvothermal method and used as a catalyst to catalyze the esterification and polycondensation of succinic acid(SA)and ethylene glycol(EG)to synthesize high molecular weight PES.The effects of catalyst dosage(the mass fraction of catalyst in the reaction material,the same below),reaction temperature and reaction time on the molecular weight of PES were investigated.The structures of PES were characterized by ^(1)H-NMR and ^(13)C-NMR,and its thermal properties,thermal stability and mechanical properties were tested.The results show that the intrinsic viscosity coefficient[η]of the synthesized PES is 0.78,the number average molecular weight(Mn)is 47500,and the corresponding polymer dispersion index(PDI)is 2.66 when the catalyst dosage is 0.6%and the polymerization is carried out at 230℃ for 8 h.The melting point temperature of PES is 102.4℃,the maximum thermal decomposition temperature is 420.2℃,the elongation at break is 505%±5%,the tensile stress is(48.3±0.6)MPa,and the tensile elastic modulus is as high as 358.8 MPa.The synthesis of PES using coal-to-ethylene glycol as a monomer can not only achieve low-cost preparation of fully biodegradable polymers,but also has important practical significance for the high-quality development of the coal chemical industry.

关 键 词：乙酸氧钛 煤化工 全生物降解聚合物 乙二醇 聚丁二酸乙二醇酯 

分 类 号：TQ323.43[化学工程—合成树脂塑料工业]