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。 The molecular weight distribution of alkyd resin was investigated by gel permeation chromatography (GPC). The results showed that the average molecular weight increased with the increase of reaction time, and its distribution gradually changed from symmetrical distribution to asymmetric distribution.