The molecular weight and molecular weight distribution of styrene modified alkyd were obtained by GPC.The performance parameters of the styrene modified alkyd and its varnish were determined.

• 用GPC测试苯乙烯改性醇酸树脂的分子质量及其分布，并测试苯乙烯改性醇酸树脂及其快干醇酸漆的性能。