水性聚氨酯中HDI/IPDI质量比的测定研究

摘要

The relationship between the mass ratio and the peak area ratio of characteristic peaks of HDI and IPDI in waterborne polyurethane( WPU) material was researched by pyrolysis gas chromatography-mass spectrome-try. The results showed that there was a linear relationship for isocyanate HDI and IPDI between the mass ratio and the characteristic peak area ratio when the WPU products were in a state of uniform solution. The semi-quantitative analysis method was established to determine this two kinds of isocyanate in WPU products.%采用热裂解-气质联用(P y-GC/MS)的方法,研究了水性聚氨酯材料中两种二异氰酸酯原料六亚甲基二异氰酸酯(HDI)和异佛尔酮二异氰酸酯(IPDI)的实际质量比与质谱特征峰峰面积比例的关系.研究表明,聚氨酯处于均一溶液状态下,这两种二异氰酸酯的特征峰峰面积比例与其实际质量比呈线性关系,从而建立了测定水性聚氨酯产品中HDI/IP DI比例的半定量分析方法.