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Thermal properties of calcium carbonate powder reinforced vinyl ester composites: Pilot study

Authors

  • Harry Ku,

    Corresponding author
    1. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
    2. Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
    • Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
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  • Francisco Cardona,

    1. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
    2. Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
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  • Mustapha Jamal Eddine

    1. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
    2. Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
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Abstract

The viscoelastic properties of vinyl ester (VE) composites filled with calcium carbonate (CC) (CaCO3) powder have been evaluated using the dynamic mechanical analysis (DMA) technique. It was found that irrespective of the percentage by weight of CaCO3 powder, the VE composites postcured in an oven up to 60°C have higher glass transition temperatures (Tg) and storage modulus than their counterparts cured at ambient conditions. However, the loss moduli were lower for composites postcured in an oven than their ambient cured counterparts. It was also found that the crosslinking density of the composites slightly increased with particulate (CaCO3) loading and composites postcured in an oven have higher crosslinking density than their counterparts cured at ambient conditions. These results confirmed an increase in stiffness for composites with postcuring treatment. Micrographs by SEM were obtained and confirmed a close inter phase adhesion of the CC filler with the VE resin matrix in the composites. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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