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Thermal properties of calcium carbonate powder reinforced vinyl ester composites: Pilot study
Author(s) -
Ku Harry,
Cardona Francisco,
Jamal Eddine Mustapha
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.37973
Subject(s) - materials science , composite material , calcium carbonate , dynamic mechanical analysis , vinyl ester , glass transition , filler (materials) , viscoelasticity , polymer , copolymer
The viscoelastic properties of vinyl ester (VE) composites filled with calcium carbonate (CC) (CaCO 3 ) powder have been evaluated using the dynamic mechanical analysis (DMA) technique. It was found that irrespective of the percentage by weight of CaCO 3 powder, the VE composites postcured in an oven up to 60°C have higher glass transition temperatures ( T g ) 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 (CaCO 3 ) 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