【摘要】 研究了均聚聚丙烯 (PPH)、无规共聚聚丙烯 (PPR)、嵌段共聚聚丙烯 (PPB) 3种聚丙烯 (PP)共混体系的力学性能 ,探讨了各组分对材料性能的影响。结果表明 :PPH能使材料具有较高的刚性 ,PPB则能提高材料的韧性 ,PPH/PPR/PPB体系的冲击强度随PPB用量的增加而增加更多还原

【Abstract】 The mechanical pro perties of isotactic polypropylene(PPH)/ random copolymerized polypropylene(PPR)/ block copolymerized polypropylene(PPB) a nd the effects of the compositions on th e properties of the blends were studied The results showed that PPH could impro ve the strength of blends,PPB could resu lt in great increasement of notched impa ct strength The notched impact strength of PPH/PPR/PPB improved with the incre ase of the content of PPB更多还原