Title of article :
Multiscale homogenization modeling for thermal transport properties of polymer nanocomposites with Kapitza thermal resistance
Author/Authors :
Shin، نويسنده , , Hyunseong and Yang، نويسنده , , Seunghwa and Chang، نويسنده , , Seongmin and Yu، نويسنده , , Suyoung and Cho، نويسنده , , Maenghyo، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2013
Pages :
12
From page :
1543
To page :
1554
Abstract :
In this study, multiscale homogenization modeling to characterize the thermal conductivity of polymer nanocomposites is proposed to account for the Kapitza thermal resistance at the interface and the polymer immobilized interphase. Molecular dynamics simulations revealed that the thermal conductivity dependent on the embedded particle size originated from the structurally altered interphase zone of surrounding matrix polymer in the vicinity of nanoparticles, and clearly indicate strong dominance of interfacial phonon scattering and dispersion. To account for both the thermal resistance and the immobilized interphase, a four-phase equivalent continuum model composed of spherical nanoparticles, Kapitza thermal interface, effective interphase, and bulk matrix phase is introduced in a finite element-based homogenization method. From the given thermal conductivity of the nanocomposites obtained from MD simulations, the thermal conductivity of the interphase is inversely and numerically obtained. Compared with the micromechanics-based multiscale model, the thermal conductivity of the interphase can be obtained more accurately from the proposed homogenization method. Using the thermal conductivity of the interphase, the random distribution and radius of nanoparticles to describe real nanocomposite microstructure are considered, and the results confirm the applicability of the proposed multiscale homogenization model for further stochastic approaches to account for geometric uncertainties in nanocomposites.
Keywords :
Kapitza thermal resistance , Multiscale homogenization , Polymer nanocomposites
Journal title :
Polymer
Serial Year :
2013
Journal title :
Polymer
Record number :
1740050
Link To Document :
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