CAJ | 학술논문

采用超高分子质量聚乙烯对聚丙烯进行改性,同时采用了3种不同的添加剂PP-MAH、LLDPE、SBS,希望能进一步提高改性效果。通过两次熔融混合制备PP/UHMWPE及含有不同添加剂的共混物,对其力学性能进行测试及表征。实验结果表明,UHMWPE在基体中形成物理交联的网络结构,可在冲击作用下吸收、传递大量的冲击能,从而有效地改善PP的冲击性能,当UHMWPE含量为30%（w）时,共混物的冲击强度可达到68.0 J/m,为纯聚丙烯的2.5倍,同时材料的抗拉强度无损失。由于UHMWPE与PP的相容性较差,增容剂SBS可以有效地改善两者的相容性,加入6%（w）SBS后,可有效地改善两相间的相容性,使超高分子质量聚乙烯均匀地分散在基体中,使材料的冲击强度进一步提高
채용초고분자질량취을희대취병희진행개성,동시채용료3충불동적첨가제PP-MAH、LLDPE、SBS,희망능진일보제고개성효과。통과량차용융혼합제비PP/UHMWPE급함유불동첨가제적공혼물,대기역학성능진행측시급표정。실험결과표명,UHMWPE재기체중형성물리교련적망락결구,가재충격작용하흡수、전체대량적충격능,종이유효지개선PP적충격성능,당UHMWPE함량위30%（w）시,공혼물적충격강도가체도68.0 J/m,위순취병희적2.5배,동시재료적항랍강도무손실。유우UHMWPE여PP적상용성교차,증용제SBS가이유효지개선량자적상용성,가입6%（w）SBS후,가유효지개선량상간적상용성,사초고분자질량취을희균균지분산재기체중,사재료적충격강도진일보제고
UHMWPE was applied to modify PP in our study.PP-MAH、LLDPE、SBS were also added in the blend with the aim of further improving the toughening effect of UHMWPE on the matrix.Composites were prepared by two melt mixing processes.The mechanical characters,thermal properties,sub-microscopic morphology and crystallization behaviors were investigated.Forming a physical cross linking network in the matrix,UHMWPE could improve the impact strength of PP by transmitting and absorbing large amount of impact energy.At UHMWPE content of 30%（w）,the impact strength of the blend could reach 68 J/m which is 2.5 times that of pure PP without any loss of tensile strength.As the immiscibility of UHMWPE and PP induced the phase separation,compatibilizer, especially 6%（w） of SBS,could improve it and then further enhance the impact strength of the material.