Reinforcing thermoplastic polymers with natural fibres tends to improve tensile and flexural strength but adversely affect elongation and impact strength. This limits the application of such composites where toughness is a major criterion. In the present work, bamboo fibre reinforced polypropylene (PP) composites were prepared with bamboo fibre content varying from 30% to 50% with improved impact resistance. Homopolymer and copolymer PP were used as the matrix polymer and an elastomer was used (10% by wt.) as an additive in the formulation. Copolymer based composites exhibited superior elongation and impact strength as compared to homopolymer based composites. The adverse impact of elastomer on tensile and flexural strength was more pronounced in homopolymer based composites. The study suggested that the properties of the bamboo composites can be tailored to suit different applications by varying reinforcement and elastomer percentage.

用天然纤维增强热塑性聚合物往往会改善拉伸强度和挠曲强度，但会对伸长率和冲击强度产生不利影响。在韧性是主要标准的情况下，这限制了这种复合材料的应用。在目前的工作中，制备了竹纤维增强聚丙烯（PP）复合材料，其竹纤维含量在30％至50％之间变化，并且具有改进的抗冲击性。在配方中，均聚物和共聚物PP被用作基体聚合物，而弹性体被用作添加剂（按重量计10％）。与基于均聚物的复合物相比，基于共聚物的复合物表现出优异的伸长率和冲击强度。弹性体对拉伸强度和弯曲强度的不利影响在均聚物基复合材料中更为明显。