Water absorption and stress relaxation behavior of PP/date palm fiber composite materials

Sonia Boukettaya, Fahad Almaskari, Ahmed Abdala, Ahmad Alawar, Hachmi Ben Daly, Adel Hammami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, the effects of the fiber loading, the coupling agent content and the amount of the absorbed humidity on the stress relaxation behavior of the PP/date palm fibers composite material were characterized, using a dynamic mechanical analyzer (DMA). The obtained results have indicated that the rate of stress relaxation decreases as the date palm fiber content increases. It is therefore suggested that the presence of the natural fibers in composite materials do not help polymer molecules to recover their original configurations, generally present in the polymer matrix before any mechanical loading. The use of the coupling agent was found to also reduce such rate, due to the improvement of the quality of adhesion between the reinforcing phase and the polymer molecules. By increasing the amount of the absorbed humidity, a higher relaxation rate was obtained. This is an expected result since the presence of water molecules in composite materials encourages the relative movement (sliding) of polymer molecules, reducing therefore their recovering time and these can regain their initial configuration at a higher rate.

Original languageEnglish
Pages (from-to)437-445
Number of pages9
JournalLecture Notes in Mechanical Engineering
Volume789
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Stress relaxation
Water absorption
Polymers
Molecules
Fibers
Coupling agents
Composite materials
Atmospheric humidity
Regain
Natural fibers
Polymer matrix
Adhesion
Water

Keywords

  • Composite
  • Coupling agent
  • Date palm fiber
  • Polypropylene
  • Stress relaxation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Fluid Flow and Transfer Processes

Cite this

Water absorption and stress relaxation behavior of PP/date palm fiber composite materials. / Boukettaya, Sonia; Almaskari, Fahad; Abdala, Ahmed; Alawar, Ahmad; Daly, Hachmi Ben; Hammami, Adel.

In: Lecture Notes in Mechanical Engineering, Vol. 789, 2015, p. 437-445.

Research output: Contribution to journalArticle

Boukettaya, Sonia ; Almaskari, Fahad ; Abdala, Ahmed ; Alawar, Ahmad ; Daly, Hachmi Ben ; Hammami, Adel. / Water absorption and stress relaxation behavior of PP/date palm fiber composite materials. In: Lecture Notes in Mechanical Engineering. 2015 ; Vol. 789. pp. 437-445.
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