ENR与PP-MAH双组分相容剂在胶粉增韧废PP材料中的作用研究

Effect of ENR/PPMAH Twocomponent Compatibilizer on Waste PP Toughened with Ground Tire

以环氧化天然橡胶（ＥＮＲ）与马来酸酐接枝聚丙烯（ＰＰＭＡＨ）双组分相容剂改性废ＰＰ／胶粉体系，探讨了相容作用实施的条件及相容剂的最佳用量配比，并考察了胶粉用量和细度对材料力学性能的影响。结果表明，ＥＮＲ与胶粉只有先通过机械剪切作用和硫化剂ＤＣＰ交联作用达到物理化学结合，才能使ＥＮＲ和ＰＰＭＡＨ双组分相容剂发挥有效的增韧作用；按照最佳工艺和最佳共混条件，ＰＰ用量为１００份，胶粉为２０份，ＥＮＲ和ＰＰＭＡＨ均为６份时，制得复合材料的冲击强度为１４１ｋＪ·ｍ－２，拉伸强度为１８５ＭＰａ；冲击断面扫描电镜观察表明，双组分相容剂的加入强化了ＰＰ与胶粉的界面相容。

The effect of the blending procedure,the amount of compatibilizer,and the amount and particle size of ground tire on the physical properties of the waste PP/ground tire composite compatibilized with ENR/PPMAH(maleic anhydride grafted polypropylene) twocomponent compatibilizer was investigated.The results showed that the chemicophysical bonding between ENR and ground tire formed through the shearing action and the crosslinking with DCP to make ENR/PPMAH compatibilizer more effective;the impact strength of the resultant composite was 14.1 kJ·m-2 and its tensile strength was 18.5 MPa when the optimal blending procedure,100 parts of PP,20 parts of ground tire,6 parts of ENR and 6 parts of PPMAH were used;the compatibility on the boundary between PP and ground tire improved by the addition of twocomponent compatibilizer from the view of SEM on the impact crosssection.