Premium
Relaxation Processes and Glass Transition in Polymer Filled with Nanoparticles
Author(s) -
Lopez Ivan Joel,
Dolidze Vladimir,
Rivera Manuel,
Aliev Fouad
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850711
Subject(s) - materials science , glass transition , differential scanning calorimetry , polymer , fumed silica , relaxation (psychology) , nanoparticle , dielectric , methacrylate , chemical engineering , polymer chemistry , composite material , copolymer , thermodynamics , nanotechnology , psychology , social psychology , physics , optoelectronics , engineering
We report the results of the investigations of the influence of filling of polymer with Aerosil nanosize particles on the glass transition and dynamics of the α ‐ and the β ‐relaxation processes in poly(n‐octyl methacrylate) by dielectric spectroscopy and differential scanning calorimetry (DSC). The polymer was filled with hydrophilic and hydrophobic Aerosil particles of 12 nm diameter. In filled polymers the characteristic frequency of the alpha‐process was shifted to higher frequencies in comparison with pure bulk polymer at the same temperature. This suggests that the filling of the polymer with nanoparticles has resulted in the shift of its glass transition temperature T g . This change in T g was mainly due to the existence of a developed solid particle‐polymer interface and the difference in the dynamic behavior of the polymer in the surface layers at this interface compared to the bulk behavior. This result was in agreement with DSC experiments.