将新型增塑剂环氧大豆油( ESO) 与聚丁二酸丁二醇酯( PBS) 进行熔融共混，制得PBS /ESO 共混物，研究了ESO 含量对PBS 力学、流变学性能以及相形态的影响． 结果表明: ESO 可显著提高PBS 的韧性; 随ESO 含量增加，共混物的断裂伸长率、冲击强度先增大后减小，在ESO 含量为5． 0%时达到最大值，分别为PBS 的15． 0 倍和1． 4 倍，共混物的拉伸强度、拉伸模量、弯曲强度、弯曲模量则随之减小; ESO 能明显降低PBS 熔体的黏度，使其在更低的角频率下呈现出剪切变稀的流变行为; ESO 与PBS 是部分相容的，较高ESO 含量的共混物会发生明显的相分离现象．

In the investigation,the melt blending of polybutylene succinate ( PBS) and a novel plasticizer epoxidizedsoybean oil ( ESO) was carried out by using an internal mixer,and a series of PBS /ESO blends were thusprepared.Moreover,the effects of the ESO content on the mechanical and rheological properties of PBS /ESOblends as well as on their morphologies were discussed.The results show that ( 1) the introduction of the ESO significantlyimproves the tensile and impact toughness of the PBS; ( 2) with the increase of the ESO content,theelongation-at-break and the impact strength of the PBS /ESO blends first increase and then decrease,and at the ESOcontent of 5%,they both reach the maximums which are respectively 15.0 and 1,4 times those of PBS; ( 3) thetensile strength,tensile modulus,flexural strength,and flexural modulus of the PBS /ESO blends decrease with theincrease of the ESO content; ( 4) the addition of ESO significantly decrease the complex viscosity of the moltenPBS,thus resulting in an earlier shear-thinning transition of PBS; and ( 5) the PBS /ESO blend with a higher ESOcontent exhibits a distinct phase separation,which indicates that the ESO/PBS blend is a partially miscible system.