采用丙烯酸对端羟基超支化聚酯进行端基改性,使端基由羟基变成双键。并采用红外光谱和核磁氢谱对原料和产物的结构进行表征,证明得到了端基为双键的不饱和超支化聚酯,通过核磁氢谱的峰面积计算出基团的转化率在90%以上。该不饱和超支化聚酯有望应用于自由基反应的交联剂和光固化材料。 End-group hydroxyl terminated hyperbranched polyesters were modified with acrylic acid to change the hydroxyl groups into double bonds. The structures of the starting materials and products were characterized by FTIR and 1H NMR. The results showed that the unsaturated hyperbranched polyesters with double bonds were obtained. The conversion of the groups was calculated to be 90% the above. The unsaturated hyperbranched polyesters are expected to be used as free radical reactive crosslinkers and photocurable materials.