【摘要】 端羟基聚环氧氯丙烷(PECH)的羟值是影响其性质的重要指标。分别利用醋酐-吡啶电位滴定法和核磁共振法对PECH羟值进行测定,将2种方法与GB12008.3—89方法所测结果加以比较,并进行了讨论,结果表明核磁分析法简单、准确快捷,重现性好。更多还原

【Abstract】 The hydroxy value of hydroxy-terminated polyepichlorohydrin (PECH) is a very important index which influences many properties of PECH. The hydroxy value was determined by acetic anhydride-pyridine potentiometer titration and 1H-NMR quantitative analysis respectively. The results determinated by above two methods and GB12008.3—89 are compared and discussed. The results show that the method of 1H-NMR is simple, exact, rapid, and possesses the better reappearance.更多还原