PS/PTFE共混体系发泡行为研究

通过熔融共混法制备聚苯乙烯/聚四氟乙烯（PS/PTFE）共混材料，研究了PTFE含量及形态对PS/PTFE共混材料的流变行为以及发泡行为的影响。结果表明，PTFE原位成纤后可以显著改善PS/PTFE共混材料的流变行为，提高PS/PTFE共混材料的可发性；同时PTFE可以作为高效成核剂，促进泡孔成核，提高泡孔密度，降低泡孔尺寸，降低PS/PTFE共混材料的泡沫密度。

Study on Foaming Behavior of PS/PTFE Blends

PS/PTFE nanocomposites were prepared by a melt blending method, and the effects of PTFE content and morphology on the rheological behaviors and foaming behaviors of PS/PTFE blends were investigated. The results indicated that PTFE could be conducted by in-situ fibrillation to improve the rheological behavior of PS/PTFE blends significantly, thus enhancing the foamability of the blends. Meanwhile, PTFE could act as a highly effective nucleation agent to promote the cell nucleation and reduce cell size and reduced the foam density of the blends accor-dingly.