【摘要】 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。更多还原

【Abstract】 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 halfcrystal time was shortened to 57 s with a decreased by 71. 88 %. The nucleated PBS achieved a flexural modulus of689. 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.更多还原