添加剂对聚酰亚胺基复合材料微孔特性的影响

Influence of the Additives on Micro-porous Properties of Polyimide Matrix Composite

探求添加相关添加剂后对聚酰亚胺基多孔材料的微孔参量及孔径、孔径分布的影响。将粉末粒度为20μm的聚酰亚胺分别加入5％(质量分数,下同)含量的MoS_2,Pb,PTFE在35～105MPa压力下模压预成形;在平板硫化机上热压固化制备多孔材料,用气泡孔径渗透性测定仪测量微孔参量。结果表明,添加5％的MoS_2,Pb,PTFE后微孔参量均有变化,且孔径分布明显分散,以PTFE的分散更为明显。

The effects of micro-pore parameters, pore size, pore distribution of polyimide matrix micro-porous materials was studied when correlated additives are added in it. 5% (mass fraction) MoS2, 5% Pb and 5% PTFE were added in polyimide powders of grain of 20μm separately at the pressure of 35-105MPa to mold beforehand by molding-pressure process, micro-porous materials were prepared by hot pressing and consolidation in vulcanizer. Pore parameters was measured through foam-diameter instrument. The results show that all pore parameters have changes when 5% MoS2, Pb, PTFE are added, and pore size distributions are disperse obviously, especially the disperse of PTFE is more obviously.