C_(36)二聚脂肪酸/聚乙二醇聚酯的制备及动力学研究  

Study on the preparation and kinetics of C_(36) dimer fatty acid-polyethylene glycol polyester

作　　者：冯光炷[1] 李和平[2] 崔英德[3] 卢奎[1] 渠海[1] 

机构地区：[1]河南工业大学化学化工学院,河南郑州450052 [2]桂林工学院材料与化学工程系,广西桂林514004 [3]仲恺农业技术学院绿色化工研究所,广东广州510225

出　　处：《化学工程》2007年第7期75-78,共4页Chemical Engineering(China)

基　　金：河南省自然科学基金资助项目(0511021000)

摘　　要：以C36二聚脂肪酸和聚乙二醇400为原料,缩聚得到一种新型高分子表面活性剂,适宜的工艺条件:在0.097 MPa下,n(二聚脂肪酸)∶n(聚乙二醇400)为1∶1.2,催化剂SnCl2(相对二聚脂肪酸质量分数为0.3%,反应温度200℃,反应时间6 h,酯化率达到98.11%。建立了SnCl2催化下,二聚脂肪酸与聚乙二醇缩聚反应的动力学模型,并采用改进的遗传算法,对动力学模型参数进行估算。结果显示,二聚脂肪酸与聚乙二醇400缩聚反应级数为0.998级,酯化反应活化能E=97.18 kJ/mol,指前因子A=1.947 9×109L/(mol.min),缩聚反应的Arrhenius方程为lnk=21.39-11.689/T。C36 dimer fatty acid （DFA）-polyethylene glycol 400 （PEG 400） polyester, a new kind of non-ionic polymeric surfactant, was synthesized using DFA and PEG 400 as materials under 0. 097 MPa. The optimum reaction conditions were as follows： n（DFA） ： n（PEG 400） was 1： 1.2, the amount of catalyst SnCl2 was 0.3% of the mass of DFA, reaction temperature was 200 ℃, reaction time was 6 h. The conversion ratio of polyesterification could reach 98.11%. New kinetic model of polyesterification reaction was established taking SnCl2 as catalyst. The Genetic Algorithm optimized was used to estimate the parameters of the kinetic model. The research results show that the speed degree of polyesterification reaction of DFA and PEG is 0.998, activation energy is 97.18 kJ/mol. Pre-exponential A = 1. 947 9×10^9L/（mol·min）. Arrhenius equation is as follows： ln k = 21.39 - 11. 689/T.

关 键 词：C36二聚脂肪酸聚乙二醇聚酯 合成 遗传算法 动力学 活化能 

分 类 号：TB324[一般工业技术—材料科学与工程]