Impact response of recycled polypropylene-based composites under a wide range of temperature: Effect of filler content and recycling

Kui Wang, F. Addiego, N. Bahlouli, Said Ahzi, Y. Rémond, V. Toniazzo

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This work aimed at investigating the thermal mechanical behavior of recycled polypropylene (PP)-based composites under dynamic loading. PP was blended by extrusion with different fractions of ethylene octene copolymer (EOC) as soft rubber toughening agent and talc as rigid reinforcing agent. To simulate mechanical recycling, the composites were grinded and re-extruded up to 6. times. The dynamic behavior was studied by means of a split Hopkinson pressure bar at various strain rates and temperatures. We found that neat PP and PP/talc composites presented a brittle behavior at low temperatures. The addition of EOC inclusions markedly improved the impact resistance of PP and PP/talc. The results also indicated that the impact resistance of PP/talc was improved with the recycling numbers due to a fragmentation of the talc particles during the reprocessing inducing a self-reinforcement. However, the impact resistance of PP/EOC decreased with the recycling due to chain scission mechanisms. Concerning PP/EOC/talc composite, its dynamic behavior was almost constant with the recycling number possibly induced by equilibrium between self-reinforcement and chain scission mechanisms. Complementary information about the dynamic behavior of the materials was deduced from optical microscopy investigation of the morphology after dynamic compression testing.

Original languageEnglish
Pages (from-to)89-99
Number of pages11
JournalComposites Science and Technology
Volume95
DOIs
Publication statusPublished - 1 May 2014
Externally publishedYes

Fingerprint

Polypropylenes
Thermal effects
Talc
Fillers
Recycling
Composite materials
Impact resistance
Ethylene
Copolymers
Reinforcement
Compression testing
Toughening
Rubber
Optical microscopy
Extrusion
Strain rate
Temperature
ethylene

Keywords

  • A. Particle-reinforced composites
  • A. Recycling
  • B. Impact behaviour
  • B. Mechanical properties
  • B. Stress/strain curves

ASJC Scopus subject areas

  • Engineering(all)
  • Ceramics and Composites

Cite this

Impact response of recycled polypropylene-based composites under a wide range of temperature : Effect of filler content and recycling. / Wang, Kui; Addiego, F.; Bahlouli, N.; Ahzi, Said; Rémond, Y.; Toniazzo, V.

In: Composites Science and Technology, Vol. 95, 01.05.2014, p. 89-99.

Research output: Contribution to journalArticle

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