Mechanical properties improvement of recycled polypropylene with material value conservation schemes using virgin plastic blends

Djoko Sihono Gabriel, Afifah Nadia Tiana

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Plastic packaging that applied material value conservation paradigm will generate good quality plastic waste. It can be recycled to produce raw material for new packaging. However, repetitive recycling has impacts on lowering its mechanical properties. Recycled plastic is expected not to undergo mechanical properties degradation. This research proposed to blend recycled plastic pellets with its virgin plastic to reduce mechanical properties degradation. Mechanical properties of recycled polypropylene are compared to 100% virgin polypropylene and recycled/virgin polypropylene blends with composition 90/10, 70/30, 50/50, 30/70, and 10/90. Mechanical properties tested in this research are modulus of elasticity, tensile strength, elongation at break, and density. All were tested according to ASTM for mechanical properties testing materials. This study revealed blending 50% virgin polypropylene significantly improves mechanical properties of recycled plastics and keep improving at 70% virgin polypropylene. The optimum improvement based on four mechanical properties was found at composition 30/70 of recycled/virgin plastic. Elongation at break is the most critical property where degradation was found at 90/10. Blending 6th recycled and virgin polypropylene gives opportunities to improve the mechanical properties of recycled plastic products with careful consideration of the compositions. By implementing material value conservation, good quality plastic waste can be recycled repetitively. This will decrease accumulation of plastic waste generation and usage of non-renewable plastic’s raw material. The positive impact is not only to economic of plastic industry but also to the quality of environment.

Original languageEnglish
Title of host publication8th Asia Conference on Mechanical and Materials Engineering - Selected peer-reviewed full text papers fromthe 8th Asia Conference on Mechanical and Materials Engineering
EditorsOmar S. Es-Said
PublisherTrans Tech Publications Ltd
Pages76-81
Number of pages6
ISBN (Print)9783035737059
DOIs
Publication statusPublished - 2020
Event8th Asia Conference on Mechanical and Materials Engineering, ACMME 2020 - Singapore, Singapore
Duration: 11 Jun 202014 Jun 2020

Publication series

NameMaterials Science Forum
Volume1015 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference8th Asia Conference on Mechanical and Materials Engineering, ACMME 2020
CountrySingapore
CitySingapore
Period11/06/2014/06/20

Keywords

  • Blending
  • Material value conservation
  • Mechanical properties
  • Mechanical recycling
  • Polypropylene

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