Through the gc analyses and the nuclear magnetic resonance analyses showed that the copolyesters obtained here were random copolymers of 3hb and 3hv units . hv fraction in the copolymers reached 38 % . through thermal analyses showed that the melting point was reduced and pyrolysis temperature was increased 经气相色谱、核磁共振分析，此共聚物为3hb与3hv所组成的不规则共聚物， hv组分在共聚物中约占38 ；经热分析，获得的phbv共聚物的熔点有所降低，分解温度有所升高，在性能上优于phb 。
