纳米二氧化硅对PPC/PBS共混体系共连续相形态的影响

The Influence of Nano-SiO_2 on Co-continuous Phase Morphology of Poly(propylene carbonate)/Poly(butylene succinate) Blends

通过熔融共混制备了聚碳酸亚丙酯(PPC)/聚丁二酸丁二醇酯(PBS)/纳米二氧化硅(nano-SiO_2)复合材料,采用扫描电镜和流变学方法研究了nano-SiO_2对复合材料共连续形貌结构的影响和复合材料形貌演变过程的动力学因素。实验结果表明,SiO_2强烈的定向聚集作用诱导分散的PBS相熔合形成连续相,当SiO_2的含量更高,形成共连续结构所需的时间更短,并且随着扫描温度和扫描频率的升高,SiO_2的定向聚集作用增强,该形貌演变过程更容易实现。

Poly （ propylene carbonate） （PPC）/poly SiO2 ） composites were prepared by melt mixing. Scanning （ butylene succinate） （PBS）/nano-silica （ nano- electron microscopy （SEM） and Rheometer were employed to investigate the influence of nano-SiO2 on the phase morphology and the kinetic factors of this morphological evolution progress. It is found that PBS droplets can be driven by the self-agglomeration of nano-SiO2 and join into the nano-SiO2 network, finally forming the co-continuous structure. When the content of nano-SiO2 is higher, the time required to form a co-continuous structure is shorter. In addition, the high temperature and high shear rate can accelerate the achievement of morphological evolution. self-agglomerating of nano-SiO2, resulting in an easier