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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,提高了结晶起始(To,c)、结晶峰(Tp,c)以及结晶结束温度(Te,c),结晶度随着nano kaolin的增加呈先增大后下降的趋势,另外通过二次升温曲线发现PBS/nano kaolin复合材料存在双重熔融行为即存在低温峰L和高温峰H;力学性能测试表明,PBS/nano kaolin复合降解材料中nano kaolin添加量较少时,材料的缺口冲击性能、断裂伸长率和拉伸强度有明显的改善;SEM结果表明,添加的少量nano kaolin可以均匀的分散在PBS树脂中,但其含量较高时会有明显的团聚的现象.综上述结果表明,在PBS中添加适量的nano kaolin能显著提高PBS的结晶和力学性能.
The poly (butylene succinate) (PBS) / nano kaolin composites were prepared by melt blending method. Their microstructure, crystallization, mechanical properties and dispersibility were investigated by FTIR, DSC, universal tensile tester and SEM The results of FTIR spectroscopy showed that the modifier chemically interacted with nano-kaolin. DSC results showed that adding nano-kaolin to PBS increased the crystallization onset (Tc, c) and crystallization peak Crystallization temperature (Te, c), crystallinity first increased and then decreased with the increase of nano kaolin. In addition, it was found by secondary heating curve that the double melting behavior of PBS / nano kaolin composites existed in the presence of low temperature peak L and high temperature Peak H; mechanical properties tests showed that the addition of nano kaolin in PBS / nano kaolin composites degraded significantly, the notched impact properties, elongation at break and tensile strength of the composites were significantly improved. SEM results showed that the addition of a small amount Nano kaolin can be uniformly dispersed in PBS resin, but there is obvious agglomeration when the content of nano kaolin is high.All the above results show that the addition of proper amount of nano kaolin in PBS can significantly improve the crystallization and mechanical properties of PBS.