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    Mechanical and thermal properties of coconut shell powder filled polylactic acid biocomposites: effects of the filler content and silane coupling agent

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    Mechanical and thermal properties of coconut shell powder filled polylactic acid biocomposites effects of the filler content and silane coupling agent.pdf (127.1Kb)
    Date
    2012
    Author
    Hakimah, Osman, Dr.
    Chun, Koayseong
    Salmah, Husseinsyah Ismail
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    Abstract
    The effects of the filler content and the coupling agent 3-aminopropyltriethoxysilane (3-APE) on the mechanical properties, thermal properties, and morphologies of polylactic acid (PLA)/coconut shell powder (CSP) biocomposites were investigated. It was found that increasing the CSP content decreased the tensile strengths and elongations at break of the PLA/CSP biocomposites. However, incorporating CSP increased their modulus of elasticity. The tensile strengths and modulus of elasticity of the PLA/CSP biocomposites were enhanced by the presence of 3-APE, which can be attributed to a stronger filler-matrix interaction. The thermal stabilities of the biocomposites increased with the filler content, and they were enhanced by 3-APE treatment. Meanwhile, the presence of CSP increased the glass transition temperatures (T g) and crystallinities (X c) of the PLA/CSP biocomposites at a filler content of 30 php. After 3-APE treatment, T g and X c of the PLA/CSP biocomposites increased due to enhanced interfacial bonding. The presence of a peak crystallization temperature (T c) for the PLA/CSP biocomposites indicated that the CSP has a nucleating effect. The melting temperatures (T m) and the T c values of the biocomposites were not significantly affected by the fillercontent and 3-APE. PLA/CSP biocomposites that had been treated with 3-APE presented the strongest filler-matrix interaction, as confirmed by SEM.
    URI
    http://link.springer.com/article/10.1007%2Fs10965-012-9859-8
    http://dspace.unimap.edu.my:80/dspace/handle/123456789/34892
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