Poly(butylene succinate) (PBS)/poly(vinyl acetate) (PVAc) blends were prepared by melt mixing. The miscibility, morphology, non-isothermal and isothermal crystallization, and rheological and mechanical properties of PBS/PVAc blends were investigated. The blends were a partial miscible two-phase system with PVAc evenly dispersed in the PBS matrix. The incorporation of PVAc accelerated the crystallization rate of PBS due to the heterogeneous nucleation, but decreased the degree of crystallinity. The rheological properties of PBS were greatly improved by the incorporation of PVAc, because of the high viscosity of PVAc in melt state. The most intriguing result was that the stiffness, strength, and toughness could be improved simultaneously by the addition of PVAc. The modulus, breaking strength, and elongation at break of PBS containing 10 wt% PVAc increased by 3.5%, 15.7%, and 43.4%, respectively. The synergetic improvement in the crystallization, rheological, and mechanical properties may be of much importance for widening the application of PBS.

中文翻译：

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聚（丁二酸丁二醇酯）/聚（醋酸乙烯酯）共混物的混溶性、形态和性能

通过熔融混合制备聚（丁二酸丁二醇酯）（PBS）/聚（醋酸乙烯酯）（PVAc）共混物。研究了 PBS/PVAc 混合物的混溶性、形态、非等温和等温结晶以及流变和机械性能。共混物是一种部分混溶的两相体系，PVAc 均匀分散在 PBS 基质中。由于异质成核，PVAc 的加入加快了 PBS 的结晶速度，但降低了结晶度。由于 PVAc 在熔融状态下的高粘度，加入 PVAc 大大改善了 PBS 的流变性能。最有趣的结果是通过添加 PVAc 可以同时提高刚度、强度和韧性。模量、断裂强度、含有 10 wt% PVAc 的 PBS 的断裂伸长率和断裂伸长率分别增加了 3.5%、15.7% 和 43.4%。结晶、流变和机械性能的协同改进对于扩大 PBS 的应用可能非常重要。