CROSSLINKING EFFECT ON THERMAL CONDUCTIVITY OF ELECTROSPUN POLY(ACRYLIC ACID) NANOFIBERS
The enhancement of thermal conductivity of polymers has been attempted using various methodologies such as chain drawing, blending, and crosslinking. Especially, the effect of crosslinking on a thermal conductivity has been a controversial issue because crosslinking facilitates heat carriers to move through molecular chains or creates phonon-phonon scattering by additional modes. This paper shows the decrease by approximately 49% in the thermal conductivity of an electrospun poly(acrylic acid) (PAA) nanofiber after crosslinking which can be induced via a heat treatment. To understand the results, PAA nanofibers were analyzed with
various characterization techniques including thermogravimetric analysis, Fourier-transform infrared spectroscopy, and differential scanning calorimetry.