Mechanical and thermal properties of Polypropylene (iPP)-High density polyethylene (HDPE) binary blends

Abstract

In this study, the mechanical and thermal properties of polypropylene (PP) and high density polyethylene (HDPE) blends in different mixture ratios are investigated. PP and HDPE 10 wt. % added blends are investigated by different tests; thermal  analysis  such as;  melting temperature, crystalline temperature, crystalline energy, involved crystalline ratio, mechanical properties such as; Tensile strength at break, at yield and elongation at break)  fitness and  the impact resistance.  PP and HDPE polymers are semi-crystalline, involving crystalline ratio for PP and HDPE 2.08 to 38.44 % and 4.66 to 62.80 respectively. For these homopolymer’s crystalline phase and blends have two melting points, but they have only one crystalline temperature. The degree of melting and crystalline of blends is not different from the values of PP and HDPE. The tensile strength at the point of flow and breaking point are not varied according to the original homopolymer but the properties of strain at the breaking point are much weakened. Moreover, polymer blends at the value of non-bending, when the comparison make with the homopolymer, an improvement can observed 2.6 % by the increased ratio of HDPE and also the impact properties of the PP can be improved by adding more than 70 wt. % HDPE in to the PP. 

Keywords

• Polymer blends,binary blends,thermal analysis,mechanical properties

References

1. Şirin, K.; Balcan, M. Mechanical properties and thermal analysis of low density polyethylene+polypropylene blends with dialkyl peroxide. Polym. Advan. Technol. 2010; 21(4), 250-255.