用熔融共混法制备聚丁二酸丁二醇酯（PBS）/聚（3-羟基丁酸酯-co-4-羟基丁酸酯）[Poly（3HB-co-4HB）]复合降解材料,利用差示扫描量热（DSC）、旋转流变仪及万能拉力机对其结晶、流变行为及力学性能进行研究。结果表明,在PBS中加入Poly（3HB-co-4HB）后,发现结晶起始温度（To,c）、结晶峰温度（Tp,c）以及结晶结束温度（Te,c）有所提高,结晶度随着Poly（3HB-co-4HB）的增加呈先增大后下降的趋势;PBS/Poly（3HB-co-4HB）复合降解材料随着Poly（3HB-co-4HB）添加量的增大,断裂伸长率和拉伸强度却呈下降趋势;同时剪切储能模量（G′）、剪切损耗模量（G″）呈现出单增趋势。因此,在复合降解材料中添加适量的Poly（3HB-co-4HB）能改善PBS的结晶、流变及力学行为。
poly（butylenes succinate）（PBS）/poly（3-hydroxybutyrate-co-4-hydroxybutyrate）（poly（3HB-co-4HB）） blends were prepared by mechanically melting mixing.The crystallinity,rheological behavior and mechanical properties of the PBS/poly（3HB-co-4HB） were studied respectively by differential scanning calorimeter（DSC）,rheometer and universal material testing machine.The DSC results indicate that the onset,peak and end crystallization temperature of PBS increase with the content of poly（3HB-co-4HB） increasing,while the degree of cystallinity of PBS increses first and then decreases.With the increase of the content of poly（3HB-co-4HB）,the storage modulus（G′） and loss modulus of blends increase significantly with increasng,while elongation at break and tensile strength of blends decline clearly.Hence,the addidtion of poly（3HB-co-4HB） could improve the properties of PBS.
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