【摘要】 用傅里叶变换红外光谱 (FTIR)法研究了脂肪族水性聚氨酯乳液制备的关键反应 ,异佛尔酮二异氰酸酯(IPDI) /二羟甲基丙酸 (DMPA)的反应动力学 ,并探讨了催化剂二月桂酸二丁基锡对反应速率的影响。结果表明 :该体系反应属于二级反应 ,其表观活化能为 3 0 .1kJ/mol,催化剂的使用可大幅提高反应速率常数 ,但对表观活化能的降低程度不太大。更多还原

【Abstract】 The reaction kinetics between isophorone diisocyanate(IPDI) and dimethylol propanoic acid(DMPA) with and without dibutyl tin dilautate(DBTDL) catalyst, which is the key reaction in synthesis of the water base polyurethane emulsion, were studied by FTIR analysis. The results show that the reaction between IPDI and DMPA belongs to the second order reaction, the apparent activation energy without catalyst is 30.1 kJ/mol, and the catalyst could apparently enhance the reaction velocity, but the activation energy reduced slightly.更多还原