Mechanical, thermal and morphological properties of poly(lactic acid)/natural rubber nanocomposites

Mohd Bijarimi, Sahrim Ahmad, Rozaidi Rasid

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This paper reports a melt blend of poly(lactic acid)/liquid natural rubber with Cloisite C30B (C30B). The mechanical, thermal and morphological properties of poly(lactic acid)/liquid natural rubber and nanocomposites were investigated. Results indicate that Young's modulus and flexural modulus increased with the addition of C30B to the poly(lactic acid)/liquid natural rubber blend. The elongation at break of poly(lactic acid)/liquid natural rubber increased significantly as compared to nanocomposite with 1% of C30B, i.e. from 37.3% to 62.4%. Nevertheless, the elongation at break and impact strength decreased gradually when nanoclay content increased above 3%, suggesting the addition of clay changed the strain response in the blend systems. The incorporation of nanoclay in the poly(lactic acid)/liquid natural rubber blends lowered the glass transition temperature values relative to poly(lactic acid). This behavior may be associated with more free volume available in the nanocomposite blend systems compared with pure poly(lactic acid). Morphological analyses by scanning electron microscope and transmission electron microscope revealed that different types of morphologies exist for poly(lactic acid)/liquid natural rubber and nanocomposites. This study indicates that poly(lactic acid)/liquid natural rubber-toughened nanocomposites with a higher modulus and that thermal stability could be produced.

Original languageEnglish
Pages (from-to)1656-1667
Number of pages12
JournalJournal of Reinforced Plastics and Composites
Volume32
Issue number21
DOIs
Publication statusPublished - Nov 2013

Fingerprint

Rubber
Lactic acid
Nanocomposites
Liquids
Elongation
Electron microscopes
Hot Temperature
poly(lactic acid)
Free volume
Impact strength
Clay
Thermodynamic stability
Elastic moduli
Scanning

Keywords

  • biopolymer
  • blend
  • nanocomposite
  • Poly(lactic acid)
  • rubber

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry
  • Ceramics and Composites

Cite this

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abstract = "This paper reports a melt blend of poly(lactic acid)/liquid natural rubber with Cloisite C30B (C30B). The mechanical, thermal and morphological properties of poly(lactic acid)/liquid natural rubber and nanocomposites were investigated. Results indicate that Young's modulus and flexural modulus increased with the addition of C30B to the poly(lactic acid)/liquid natural rubber blend. The elongation at break of poly(lactic acid)/liquid natural rubber increased significantly as compared to nanocomposite with 1{\%} of C30B, i.e. from 37.3{\%} to 62.4{\%}. Nevertheless, the elongation at break and impact strength decreased gradually when nanoclay content increased above 3{\%}, suggesting the addition of clay changed the strain response in the blend systems. The incorporation of nanoclay in the poly(lactic acid)/liquid natural rubber blends lowered the glass transition temperature values relative to poly(lactic acid). This behavior may be associated with more free volume available in the nanocomposite blend systems compared with pure poly(lactic acid). Morphological analyses by scanning electron microscope and transmission electron microscope revealed that different types of morphologies exist for poly(lactic acid)/liquid natural rubber and nanocomposites. This study indicates that poly(lactic acid)/liquid natural rubber-toughened nanocomposites with a higher modulus and that thermal stability could be produced.",
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