In this work we report the investigation of the dynamics of maleic anhydride grafted polypropylene (PPgMA) and PPgMA-based nanocomposites by means of dielectric relaxation spectroscopy (DRS) and dynamic mechanical thermal analysis (DMTA). After characterization of neat PPgMA, we study the effect of organically modified silicate filler on the dynamics of PPgMA with dynamic mechanical thermal analysis. Our results suggest that the β-relaxation process, corresponding to the glass transition of PPgMA, is affected by the clay loading. The glass-transition temperature of PPgMA increases in a composition with filler content of 30 wt.%, probably because of polymer-filler interactions, which reduces the polymer chain mobility. In the nanocomposite materials a separate high temperature process due to Maxwell-Wagner-Sillars (MWS) polarization was observed with dielectric relaxation spectroscopy.
No takes yet. Share an insight, caveat, or question.
Wang et al. (2007) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: