Crystal transformation and thermomechanical properties of poly(vinylidene fluoride)/clay nanocomposites
Authors: KP Pramoda1; Ashiq Mohamed1; In Yee Phang1; Tianxi Liu1
Source: Polymer International, Volume 54, Number 1, January 2005 , pp. 226-232(7)
Publisher: John Wiley & Sons, Ltd.
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Abstract:
The crystal transformation and thermomechanical properties of melt-intercalated poly(vinylidene fluoride) (PVDF)/clay nanocomposites are reported in this study. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to study the thermal properties of PVDF and its nanocomposites with various clay concentrations. The incorporation of clay in PVDF results in the formation of
-form crystals of PVDF. DSC study of melting behavior suggested the presence of only
-phase crystals in neat PVDF and both
- and
-phase crystals in the nanocomposite. This conclusion was corroborated by findings from Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Dynamic mechanical analysis (DMA) indicated significant improvements in storage modulus over a temperature range of 20150 °C. The coefficient of thermal expansion (CTE) decreases with increasing clay loading. Copyright © 2004 Society of Chemical Industry
Keywords: poly(vinylidene fluoride); clay; nanocomposites; crystal transformation
Document Type: Research article
DOI: 10.1002/pi.1692
Affiliations: 1: Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore
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