聚丁二酸丁二酯/纳米高岭土共混体系结晶及力学性能研究

用熔融共混法制备聚丁二酸丁二酯(PBS)/纳米高岭土(nano kaolin)复合降解材料,利用FTIR、DSC、万能拉力机和SEM对其微观结构、结晶、力学性能及分散性进行研究.FTIR光谱分析结果表明,改性剂与nano kaolin发生了化学键合作用;DSC结果表明,在PBS中加入nano kaolin,提高了结晶起...

INVESTIGATION ON CRYSTALLIZATION AND MECHANICAL PROPERTIES OF POLY( BUTYLENE SUCCINATE)/NANO KAOLIN BLENDS

In order to improve the performance of poly(butylenes succinate)(PBS) like the crystallinity and mechanical properties,PBS/nano kaolin blends were prepared by mechanical melting mixing.The microstructure,crystallinity,mechanical properties and dispersion of the PBS/nano kaolin were studied respectively with infrared spectrometer(FTIR),differential scanning calorimeter(DSC),universal material testing machine and scanning electron microscope(SEM).Infrared spectra showed picture shown that the modifier could be bonded to nano kaolin.The DSC results indicated that the onset(denoted as To,c),peak(denoted as Tp,c) and end crystallization temperature(denoted as Te,c) of PBS were increased respectively.DSC melting curves for the melt-crystallized samples were obtained at 10 K min-1.Double endothermic peaks,a high-temperature peak H and a low-temperature peak L,and an exothermic peak located between them appeared.At the same time,the crystallization degree rose first and declined finally as the nano kaolin content increased.When the content of nano kaolin was decreased,the notched impact strength,elongation at break and tensile strength of PBS/nano kaolin blends were improved obviously.The SEM results showed that at low contents nano kaolin was dispersed evenly in the blends,while agglomeration of nano kaolin was observed in blends with increasing kaolin content.The improving of the mechanical performance of PBS/nano kaolin blends is correlated with the variation of nano kaolin content.