【摘要】 基于二级反应动力学机理,研究了以甲基磺酸为催化剂的高直链淀粉醋酸酯化动力学过程。讨论了不同温度、催化剂用量以及醋酸与酸酐比例等反应条件对酯化反应速率常数k的影响,求得酯化反应活化能E=43.88kJ/mol。更多还原

【Abstract】 The esterification kinetics of high amylose starch acetates has been studied based on the proposed second-order esterification mechsnism. The influences of reaction temperature, content of catalyst and ratio of acetic acid to acetic anhydride on apparent reaction rate constants have been discussed. The apparent activation energy of the esterification is 43.88 kJ/mol.更多还原