Original Paper

Polymer Bulletin

, Volume 70, Issue 3, pp 849-857

Open Access This content is freely available online to anyone, anywhere at any time.

Study on the mechanical and morphological properties of toughened polypropylene blends for automobile bumpers

  • GuangYong LiuAffiliated withKey Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science and Technology
  • , GuiXue QiuAffiliated withKey Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science and Technology Email author 

Abstract

Studies on the use of polyolefin elastomer (POE) and high density polyethylene (HDPE) for toughening polypropylene (PP) to meet the demands of automobile bumpers were conducted. The effect of the basic resin, POE and the influences of the POE amount and HDPE doses on the mechanical properties of the blended composites were discussed. The morphology of impact fracture sections were characterized by scanning electron microscopy (SEM) while the crystalline properties were investigated by DSC. The effect of the composites’ morphology on mechanical properties was also discussed. Results showed that POE could improve the impact strength of PP while the use of HDPE had obvious effects on synergistic toughening. SEM images and DSC data analysis testified to the relationship between morphology, crystallinity and the mechanical properties.

Keywords

Polypropylene Polyolefin elastomer Automobile bumper Toughening modification