聚丁二酸丁二醇酯/乙烯-醋酸乙烯共混物的形态与性能研究

用乙烯-醋酸乙烯橡胶（EVM）对聚丁二酸丁二醇酯（PBS）进行增韧改性，通过添加过氧化二异丙苯（DCP）使得PBS与EVM的相容性增强。结果表明，随着DCP含量的增大，PBS/EVM共混物的拉伸强度、断裂伸长率、肖氏硬度等力学性能先升高，随后又降低，其中拉伸强度由7 MPa 提高到17 MPa，100 %定伸应力由2 MPa提高到10 MPa；加入DCP使得PBS的结晶由受限结晶变为正常结晶；DCP的适宜添加量为0.3份。

Morphology and Properties of Poly(butylene succinate)/ Ethylene-vinyl Acetate Blends

In this article, ethylene-vinyl acetate rubber(EVM) is used to toughen poly(butylene succinate) (PBS) and dicumyl peroxide (DCP) was added to enhance the compatibility of PBS and EVM. With increasing DCP content the tensile property and shore-D hardness were increased first and then decreased. The tensile strength was between 7 and 17 Mpa, the tensile stress at 100 % elongation was between 2 and 10 MPa. The added DCP turned PBS from a dispersed phase to a continuous phase. The optimal content of DCP was 0.3 phr.