Tensile and impact behavior of polypropylene/low density polyethylene blends

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Strapasson, R (Author) Other; Amico, SC (Author) Other; Manuel Fernando R Pereira (Author) FEUP; Sydenstricker, THD (Author) Other

Journal

Title: Polymer Testing

Vol. 24 No. 1

Pages: 468-473

ISSN: 0142-9418

Publisher: Elsevier

Indexing

Scopus - 92 Citations

Other information

Authenticus ID: P-00N-7P1

DOI: 10.1016/j.polymertesting.2005.01.001

Abstract (EN): Blends of polypropylene (PP) and low-density polyethylene (LDPE) may contribute to make recycling more economically attractive. The aim of this work was to make PP/LDPE blends (0/100, 25/75, 50/50, 75/25 and 100/0 w/w) via injection molding carried out under various injection temperatures and to evaluate their tensile and impact properties. The blends yielded tensile stress-strain curves very dependent on their composition, especially regarding elongation at break and the presence of necking. An irregular behavior for the 50/50 w/w blend is reported. Nevertheless, a linear variation of the yield strength and elastic modulus with the blend composition was observed. The behavior of the blend was also very dependent on processing temperature. Addition of 25% of LDPE to the PP may result in similar degradation of its mechanical properties to that caused by a 10 °C processing temperature increase. Statistical analyses proved valuable when reporting results concerning blends.

Language: English

Type (Professor's evaluation): Scientific