In order to enhance the dimensional stability and hot deformation temperature of PP composites, talcum powder (Talc) and bamboo charcoal (BC) were used as functional filler of PP composites, and a series of Talc/BC/PP composites were prepared. Characteristics, post-moulding shrinkage, hot deformation temperature and mechanical properties of the composites were investigated. The results showed that the surface of BC contains many pores and gaps, and the pores and gaps in the structure of BC were filled by PP (filled-BC) when BC added in PP, and BC filled the gaps between Talc and PP. The BC and Talc for improving dimensional stability and hot deformation temperature of PP have the synergistic effect. The PP composites have the best comprehensive mechanical properties when the addition amount of BC and Talc was 6%.

Keywords: bamboo charcoal, dimensional stability, hot deformation temperature, synergistic effect, comprehensive mechanical properties