不同改性剂对PP/竹纤维复合材料力学性能的影响OA

To improve the compatibility between bamboo fiber(BF)and polypropylene(PP),the influence of modifier types on the mechanical properties of PP/BF composites was investigated.The results showed that after NaOH treatment,the surface roughness of BF was increased.Subsequently,the treated BF was modified with a silane coupling agent(KH550)and a titanate coupling agent(TECA),resulting in K-BF and T-BF,respectively.Both modified BF samples exhibited further increased surface roughness and improved compatibility with PP.The tensile strength,hardness,and wear resistance of the composites prepared with modified BF were significantly enhanced.When the modified BF content reached 30 phr,the composites achieved optimal tensile strength,hardness,and wear resistance.Compared with PP,the tensile strength increased by 26.0%and 23.9%,the Rockwell hardness increased by 14.1%and 10.1%,the wear rate decreased by 76.5%and 62.7%,while the elongation at break decreased by 10.4%and 6.7%,respectively.Therefore,the type of modifier influenced the enhancement of the mechanical properties of the composites.KH550 demonstrated a better effect on improving the rigidity,whereas TECA exhibited a superior effect on enhancing the flexibility of the composites.