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Novel toughened polylactic acid nanocomposite: Mechanical, thermal and morphological properties

Hassan, Azman and Wahit, Mat Uzir and Balakrishnan, Harintharavimal and Yussufa, A. A. and Abdul Razak, Shamsul Bahri (2010) Novel toughened polylactic acid nanocomposite: Mechanical, thermal and morphological properties. Materials and Design, 31 (7). 3289 -3298. ISSN 0261-3069

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Official URL: http://dx.doi.org/10.1016/j.matdes.2010.02.008

Abstract

The objective of the study is to develop a noveltoughenedpolylacticacid (PLA) nanocomposite. The effects of linear low density polyethylene (LLDPE) and organophilic modified montmorillonite (MMT) on mechanical, thermal and morphologicalproperties of PLA were investigated. LLDPE toughened PLA nanocomposites consisting of PLA/LLDPE blends, of composition 100/0 and 90/10 with MMT content of 2 phr and 4 phr were prepared. The Young’s and flexural modulus improved with increasing content of MMT indicating that MMT is effective in increasing stiffness of LLDPE toughened PLA nanocomposite even at low content. LLDPE improved the impact strength of PLA nanocomposites with a sacrifice of tensile and flexural strength. The tensile and flexural strength also decreased with increasing content of MMT in PLA/LLDPE nanocomposites. The impact strength and elongation at break of LLDPE toughened PLA nanocomposites also declined steadily with increasing loadings of MMT. The crystallization temperature and glass transition temperature dropped gradually while the thermal stability of PLA improved with addition of MMT in PLA/LLDPE nanocomposites. The storage modulus of PLA/LLDPE nanocomposites below glass transition temperature increased with increasing content of MMT. X-ray diffraction and transmission electron microscope studies revealed that an intercalated LLDPE toughened PLA nanocomposite was successfully prepared at 2 phr MMT content.

Item Type:Article
Uncontrolled Keywords:nano composites, poly lactic acid, linear low density polyethylene, mechanical properties, thermal analysis
Subjects:Unspecified
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:26312
Deposited By: Liza Porijo
Deposited On:29 Jun 2012 08:08
Last Modified:20 Aug 2014 03:20

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