THE EFFECTS OF r-HDPE/r-PP FORMULATION RATIO INTO MECHANICAL, THERMAL AND MORPHOLOGICAL BEHAVIOR OF r-HDPE/r-PP POLYMERIC BLENDS

Jeefferie Abd Razak, Siti Zaleha Wahid, Noraiham Mohamad, Poppy Puspitasari, Rosidah Jaafar, Pindo Tutuko

Abstract


This study has reported the effects of different formulation ratio between recycled high density polyethylene (r-HDPE) and recycled polypropylene (r-PP) into the resulted mechanical, thermal and morphological properties of r-HDPE/r-PP polymeric blends. About five (5) different formulation ratio of r-HDPE/r-PP have been prepared and tested. The best combination ratio between r-HDPE and r-PP was determined in this work. It was found that the 70/30 wt.% of r-HDPE/r-PP blend possessed an outstanding mechanical and physical strength. About 59.80% and 2.30% of positive improvement in comparison to 0/100 wt.% of r-HDPE/r-PP was achieved for both of tensile strength and hardness, respectively. Interestingly, for 70/30 wt.% of r-HDPE/r-PP blend had also experienced major increased in their elongation at break up to 473%. The fracture morphological behavior of the tested samples that were observed via SEM observation, had established the interaction between the structure and properties of produced r-HDPE/r-PP blends, especially on the miscibility state between the r-HDPE and r-PP phases. Thermal evaluation by using the DSC had confirmed the partial miscibility state due to dominant peak shifting at 120 - 140°C and obvious melting peak reduction pattern. Overall, from this study, it was found that the blending between r-HDPE and r-PP into r-HDPE/r-PP blends are feasible to improve the properties of primary phase.

Keywords


r-HDPE/r-PP recycled blends; injection molding scrap; sustainable; miscibility

Full Text:

PDF

References


Verdolotti L, Iucolano F, Capasso I, Lavorgna M, Iannace S, Liguori B. Recycling and recovery of PE‐PP‐PET‐based fiber polymeric wastes as aggregate replacement in lightweight mortar: Evaluation of environmental friendly application. Environmental Progress and Sustainable Energy. 2014;33(4): 1445-1451.

Al-Salem S.M, Lettieri P, Baeyens J. Recycling and recovery routes of plastic solid waste (PSW): A review. Waste Management. 2009;29(10): 2625–2643.

Salih S.E, Hamood A.F, Alsabih A.H. Comparison of the characteristics of LDPE: PP and HDPE: PP polymer blends. Modern Applied Science. 2013;7(3): 33.

Gu L, Ozbakkaloglu T. Use of recycled plastics in concrete: A critical review. Waste Management. 2016;51: 19-42.

Iwata T. Biodegradable and bio-based polymers: Future prospects of eco-friendly plastics. Angewandte Chemie - International Edition. 2015;54(11): 3210–3215.

Singh N, Hui D, Singh R, Ahuja I.P.S, Feo L, Fraternali F. Recycling of plastic solid waste: A state of art review and future applications. Composites Part B: Engineering. 2015;115: 409-422.

Bernardo C.A, Simões C.L, Pinto L.M.C. Environmental and economic life cycle analysis of plastic waste management options. A review. In AIP Conference Proceedings. 2016;1779(1): 140001.

Smith W.F, Hashemi J. Foundations of Materials Science and Engineering. 4th Edition McGraw-Hill Higher Education, New York; 2006.

Tao Y, Pan Y, Zhang Z, Mai K. Non-isothermal crystallization, melting behavior and polymorphism of polypropylene in β-nucleated polypropylene/recycled poly (ethylene terephthalate) blends. European Polymer Journal. 2007;44(4): 1165-1174.

Montes P, Rafiq Y.A, Hill M.J. A study of blends of isotactic polypropylene with high density polyethylene by transmission electron microscopy. Polymer. 1998;39(25): 6669-6672.

Aumnate C, Gamonpilas C, Kruenate J. Effect of ethylene vinyl acetate on the rheological and mechanical behavior of low-density polyethylene-based greenhouse film. Advanced Materials Research. 2010;93: 475-478.

Madi N.K. Thermal and mechanical properties of injection molded recycled high density polyethylene blends with virgin isotactic polypropylene. Materials and Design. 2013;46: 435–441.


Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.