草酸二异辛酯的合成及增塑PVC性能研究  

Study on synthesis of Di-2-Ethylhexyl Oxalate and used as plasticizer for PVC

作　　者：刘三荣[1] 张会良[1] 张贵宝[1] 白云刚[1] 董丽松[1] 李悦生[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《塑料助剂》2013年第2期21-24,45,共5页Plastics Additives

基　　金：国家863计划资助项目(2012AA062904);吉林省科技发展计划资助项目(20106029);省院合作长吉图科技专项资金项目(2011CJT0014)

摘　　要：以钛酸正四丁酯为催化剂,草酸和异辛醇为原料,合成了草酸二异辛酯(DEHO),利用FTIR,1H-NMR对所得增塑剂进行了表征。将所得产物用于与聚氯乙烯(PVC)的共混增塑,通过拉伸、动态力学测试(DMA)、旋转流变、熔融指数等测试手段考察共混产物的静力学性能、动态力学性能、流变学性能以及加工性能。结果表明,DEHO的加入能使PVC/DEHO共混体系的拉伸强度降低,断裂伸长率升高,表现出典型的橡胶态塑料的性质;共混体系的玻璃化转变温度(tg)也大幅降低,获得良好的动态力学性能;储能模量(G′)、损耗模量(G″)、复数黏度(η*)降低一个数量级以上,表现出典型的牛顿流体的特征;熔融指数大幅升高,表明材料的加工性能也得到提升。Di-2-Ethylhexyl Oxalate （DEHO） was successfully synthesized from oxalic acid and iso-oc- tanol over a catalyst tetrabutyl titanate and characterized by FT-IR, 1H-NMR, etc. By blending DEHO with polyvinyl chloride （PVC） , the blends samples containing different amount of DEHO were prepared. Tensile, DMA, Rheologieal Property and Melt index were tested. The blends samples show properties of typical rubber state plastic： the tensile strength decreased and the breaking elongation is enhanced expeditiously with the in- creasing of DEHO content. Glass transition temperature （tg） of the blends samples decreased with the increas- ing of DEHO content. Storage modulus （G＇）, loss modulus （G＂） and complex viscosity （η/＊） have more than an order of magnitude decline, which represent the typical properties of Newtonian fluid. With melt index increased significantly, processing performance get promoted.

关 键 词：草酸二异辛酯 增塑 聚氯乙烯 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]