成核剂对聚丁二酸丁二醇酯结晶与性能的影响

以酰肼类成核剂TMC?300对聚丁二酸丁二醇酯（PBS）结晶与性能的影响为主要研究对象，运用差示扫描量热仪、偏光显微镜、电子拉力万能材料试验机、数位冲击仪和热变形微卡温度测定仪等手段考察了TMC?300对PBS结晶过程、力学性能、热性能和收缩性的影响。结果表明，TMC?300可以有效提高PBS的结晶速度与结晶度，同时具有细化晶粒尺寸的作用，结晶峰值温度提高了4.74 %，半晶时间缩短了71.88 %，达到57 s；TMC?300的加入使PBS的弯曲模量、热变形温度和冲击强度均有提高，增幅最高分别为9.5 %、5.5 %、171.4 %，分别达到689.4 MPa、89.6 ℃、17.75 MPa，显示出良好的刚韧兼顾性和耐热性；成核剂TMC?300的加入使PBS各向收率均有所增大，但收缩比更接近于1，更易于改善PBS的形变和翘曲问题。

Effect of Nucleating Agent on Crystallization and Properties of Poly（butylene succinate）

This paper focused on the effect of hydrazide nucleating agent （TMC?300） on the crystallization and properties of poly（butylene succinate） （PBS）. The effect of TMC?300 on the crystallization process， mechanical properties， thermal properties and shrinkage of PBS were investigated with differential scanning calorimeter， polarizing microscope， electron tension universal test machine， digital impact meter and thermal deformation micro?card temperature meter. The results indicated that the crystallization speed and crystallinity of PBS increased with the addition of TMC?300， and its crystal size was reduced significantly. Moreover， the crystallization temperature increased by 4.74 %， and the half?crystal time was shortened to 57 s with a decreased by 71.88 %. The nucleated PBS achieved a flexural modulus of 689.4 MPa， a heat distortion temperature of 89.6 °C and impact strength of 17.75 MPa， which increased by 9.5 %， 5.5 %， and 171.4 % respectively. This indicates a good balance among the rigidity and toughness and heat resistance. Although the shrinkage of PBS increased in the presence of TMC?300， the shrinkage ratio was closer to 1. This is easier to resolve the deformation and warpage problems occurring in PBS.