Strength improvement in injection-molded jute-fiber-reinforced polylactide green-composites

Yoshihiko Arao, Takayasu Fujiura, Satoshi Itani, Tatsuya Tanaka

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The mechanical properties of green-composites based on polylactic acid (PLA) with jute fibers were investigated. A long fiber pellet was developed to obtain a high aspect ratio of residual fiber after injection molding. Comparative studies were carried out, where shorter fiber pellets were compounded by different screw configurations using a twin-screw extruder. To interpret the results of our mechanical tests, the fiber geometry, dispersion state, and fiber fracture surfaces after tensile testing were analyzed. We found that the composites made of short fiber pellet (which suffer high compound intensity), exhibited optimal mechanical performance. Although, compounding with a twin-screw extruder decreased the overall aspect ratio of residual fibers, we observed that it significantly facilitated both the dispersion of the jute yarn to jute bundle and the decohesion of jute bundle to elementary fibers. This fiber separation caused by high intensity mixing led to efficient load transfer from matrix to fiber, and improvement of interfacial strength. These findings provide us with an insight into the critical parameters required to develop a high performing jute/PLA composite.

Original languageEnglish
Pages (from-to)200-206
Number of pages7
JournalComposites Part B: Engineering
Volume68
DOIs
Publication statusPublished - 2015 Jan
Externally publishedYes

Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Strength
  • E. Injection molding

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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