【摘要】 用IR光谱法测定聚碳酸亚丙酯样品中的环状小分子杂质碳酸亚丙酯。发现该杂质的质量分数与1/(A1180/A1250+1)呈线性关系 (A1180 和A1250 分别为波数1180cm-1 和1250cm-1 处的吸光度) ;标准偏差为0.011 ;回归系数为0.9992。该法用以代替 1HNMR法 ,可以较简单地给出可靠结果 ,满足常规测试的要求。更多还原

【Abstract】 Procedures were suggested for IR determination of the quantities of cyclic carbonate in poly(propylene carbonate) samples. It was found that the mass fraction of the cyclic carbonate is linearly correlated with 1/(A1 180 /A1 250+1), where A1 180 and A1 250 are the absorbancy of the samples at 1 180 cm-1 and 1 250 cm-1. The standard deviation of the method is 0.011, and the regression coefficient is 0.999 2. The method is simple, reliable and may be used instead of 1H NMR.更多还原