【摘要】 用凝胶色谱(简称GPC)研究了醇酸树脂的分子量分布。结果表明,平均分子量随反应时间的增加而增大,其分布是从对称分布逐渐变成不对称分布。更多还原

【Abstract】 The molecular weight of polyesters was measured with GPC,VPO and intrinsic viscosity. In this work with the aid of theoretical treatment, the experimental results were translated into the calibration curve.When this curve was combined with the universal calibration curve, most promising parameters,e.g. K,α, and [η] were obtained. The results showed the molecular weight increases with the reaction time and the content of water decreases in ester bodies.更多还原