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Thermal properties of polytetrafluoroethylene/Sr 2 Ce 2 Ti 5 O 16 polymer/ceramic composites
Author(s) -
Subodh G.,
Manjusha M. V.,
Philip J.,
Sebastian M. T.
Publication year - 2008
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.27606
Subject(s) - materials science , composite material , ceramic , thermal expansion , differential scanning calorimetry , thermal conductivity , thermal diffusivity , scanning electron microscope , polytetrafluoroethylene , microstructure , volume fraction , melting point , physics , quantum mechanics , thermodynamics
Polytetrafluoroethylene (PTFE) composites filled with Sr 2 Ce 2 Ti 5 O 16 ceramic were prepared by a powder processing technique. The structures and microstructures of the composites were investigated by X‐ray diffraction and scanning electron microscopy techniques. Differential scanning calorimetry showed that the ceramic filler had no effect on the melting point of the PTFE. The effect of the Sr 2 Ce 2 Ti 5 O 16 ceramic content [0–0.6 volume fraction (vf)] on the thermal conductivity, coefficient of thermal expansion (CTE), specific heat capacity, and thermal diffusivity were investigated. As the vf of the Sr 2 Ce 2 Ti 5 O 16 ceramic increased, the thermal conductivity of the specimen increased, and the CTE decreased. The thermal conductivity and thermal expansion of the PTFE/Sr 2 Ce 2 Ti 5 O 16 composites were improved to 1.7 W m −1 °C −1 and 34 ppm/°C, respectively for 0.6 vf of the ceramics. The experimental thermal conductivity and CTE were compared with different theoretical models. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008