The effect of kenaf filler reinforcement on the mechanical and physical properties of injection moulded polypropylene composites

Mohd Khairul Fadzly Md Radzi, Norhamidi Muhamad, Majid Niaz Akhtar, Zakaria Razak, Farhana Mohd Foudzi

Research output: Contribution to journalArticle

Abstract

Natural fibres potentially offer better reinforcement to improve the mechanical and physical properties of polymer composites. However, these natural materials at this stage are not fully explored yet due to the fibres themselves have limited heat resistance and are quite sensitive to moisture. This limitation will weaken the adhesion when interacting with thermoplastic matrices during the processing of composites. Therefore, the main purpose of this study is to investigate inherent strength characteristics among kenaf (core and bast) fillers as a reinforcement in polypropylene composites at various geometries and loadings via the injection moulding process. The composite materials consisted of kenaf with the geometric core filler of the 20 mesh (992 μm), 40 mesh (460 μm) and bast filler (166.9 μm) were mixed with polypropylene based on the filler loadings of 10 up to 40 wt. %. The results showed that bast filled composites had the highest tensile strength of 19.52 MPa at 30 wt. %, compared to core filled composites. Instead, 20 mesh core filled composites were obtained had the highest flexural strength which values were 25 MPa and 29 MPa at 20 wt. % and 30 wt. %, respectively. While 40 mesh core filled composites had the highest values of 25.35 MPa at 40 wt. % of filler loading compared to bast filled composites. SEM micrograph images showed the good interfacial bonding of core filler which surrounded by PP leading to diffusion and permeation of bonding. In conclusion, the use of kenaf (core and bast) fillers as a reinforcement in composite materials is reasonable to maximise the use of fibre from natural sources.

Original languageEnglish
Pages (from-to)367-376
Number of pages10
JournalSains Malaysiana
Volume47
Issue number2
DOIs
Publication statusPublished - 1 Feb 2018

Fingerprint

Fillers
Polypropylenes
Reinforcement
Physical properties
Mechanical properties
Composite materials
Natural fibers
Fibers
Heat resistance
Injection molding
Permeation
Bending strength
Thermoplastics
Tensile strength
Moisture
Adhesion
Scanning electron microscopy
Geometry
Polymers
Processing

Keywords

  • Injection moulding
  • Kenaf filler
  • Mechanical properties
  • Polypropylene
  • SEM micrograph images

ASJC Scopus subject areas

  • General

Cite this

The effect of kenaf filler reinforcement on the mechanical and physical properties of injection moulded polypropylene composites. / Radzi, Mohd Khairul Fadzly Md; Muhamad, Norhamidi; Akhtar, Majid Niaz; Razak, Zakaria; Mohd Foudzi, Farhana.

In: Sains Malaysiana, Vol. 47, No. 2, 01.02.2018, p. 367-376.

Research output: Contribution to journalArticle

Radzi, Mohd Khairul Fadzly Md ; Muhamad, Norhamidi ; Akhtar, Majid Niaz ; Razak, Zakaria ; Mohd Foudzi, Farhana. / The effect of kenaf filler reinforcement on the mechanical and physical properties of injection moulded polypropylene composites. In: Sains Malaysiana. 2018 ; Vol. 47, No. 2. pp. 367-376.
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