摘要
以柠檬酸和正丁醇为原料,一水合硫酸氢钠为催化剂合成了柠檬酸三丁酯(TBC);考察了影响其酯化率的因素。通过实验确定了最佳反应条件:0.1 mol柠檬酸,醇酸物质的量之比为4.8 1∶,一水合硫酸氢钠是合成柠檬酸三丁酯的优良催化剂,其用量4.5 g,反应时间2.5 h,反应温度110～120℃,酯化率达到88.1%,产品为微黄色透明油状液体,折光率为n2D5=1.443～1.445,沸点为225℃,并用红外对产品进行鉴定。通过TBC和邻苯二甲酸二辛酯(DOP)增塑聚氯乙烯(PVC)进行对比研究。结果表明,当m(TBC)∶m(PVC)=25 1∶00时,TBC增塑PVC材料的拉伸强度、断裂伸长率及低温性能与DOP增塑PVC材料性能相当。
The tributyl citrate （TBC） was synthesized with citric acid and n-butanol as the raw materials, sodium bisulfate as the catalyst. The factors of affecting the esterification rate were studied. The results showed the optimum reaction conditions： with 0. 1 tool citric acid, and the alcohol/acid was 4. 8/1, sodium bisulfate was an excellent catalyst, and the content was 4. 5 g, reaction time was 2.5 h, reaction temperature was 110 ℃ -120 ℃, the esterification rate was at 88. 1%. The product was light yellow 25 transparent oily liquid, the refractive rate nD^25 was 1. 443 - 1. 445, a boiling point was at 225 ℃, and the products were identified by infrared spectra. TBC and DOP plasticized PVC were compared. The results showed that when m （TBC）：m （PVC） = 25：100, the tensile strength, elongation at break and low temperature performance of TBC plasticized PVC were fairly the same with those of the DOP plasticized PVC material.
出处
《塑料工业》
CAS
CSCD
北大核心
2012年第10期24-27,共4页
China Plastics Industry
基金
湖北省教育厅科学研究计划项目(B20084001)
关键词
环保增塑剂
柠檬酸三丁酯
一水合硫酸氢钠
酯化率
拉伸性能
Environmental Plasticizers
Tributyl Citrate
Sodium Bisulfate
Esterification Rate
Tensile Property
