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二苯甲烷二氨基甲酸甲酯热分解制备二苯甲烷二异氰酸酯的表观动力学研究
Authors
张琴花
李会泉
柳海涛
裴义霞
Publication date
1 January 2011
Publisher
Abstract
研究了在癸二酸二(2-乙基己基)酯溶剂中二苯甲烷二氨基甲酸甲酯(MDC)热分解产生二苯甲烷二异氰酸酯(MDI)的反应机理,建立了二苯甲烷二氨基甲酸甲酯的分解反应动力学模型.通过实验测定,对不同温度下体系中各物质的浓度数据进行线性拟合得到反应速率方程.结果表明,MDC的热分解分为2个步骤,均为一级反应.两步反应的活化能分别为138.82和167.78 kJ/mol;指前因子分别为1.51×10^12和5.33×10^14min-1
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Last time updated on 11/04/2021