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Crystal transformation and thermomechanical properties of poly(vinylidene fluoride)/clay nanocomposites
Author(s) -
Pramoda KP,
Mohamed Ashiq,
Yee Phang In,
Liu Tianxi
Publication year - 2005
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1692
Subject(s) - nanocomposite , materials science , thermogravimetric analysis , differential scanning calorimetry , dynamic mechanical analysis , fourier transform infrared spectroscopy , composite material , fluoride , phase (matter) , thermomechanical analysis , thermal expansion , chemical engineering , polymer , organic chemistry , chemistry , thermodynamics , inorganic chemistry , physics , engineering
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 β‐form crystals of PVDF. DSC study of melting behavior suggested the presence of only α‐phase crystals in neat PVDF and both α‐ and β‐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 20–150 °C. The coefficient of thermal expansion (CTE) decreases with increasing clay loading. Copyright © 2004 Society of Chemical Industry