Article

Relaxation Processes and Glass Transition in Polymer Filled with Nanoparticles

  1. Ivan Joel Lopez,
  2. Vladimir Dolidze,
  3. Manuel Rivera,
  4. Fouad Aliev*

Article first published online: 11 JUL 2008

DOI: 10.1002/masy.200850711

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Nanostructured Polymers and Polymer Nanocomposites

Volume 267, Issue 1, pages 63–68, June 2008

Additional Information

How to Cite

Lopez, I. J., Dolidze, V., Rivera, M. and Aliev, F. (2008), Relaxation Processes and Glass Transition in Polymer Filled with Nanoparticles. Macromol. Symp., 267: 63–68. doi: 10.1002/masy.200850711

Author Information

  1. Department of Physics, University of Puerto Rico, PO BOX 23343, San Juan, PR 00931-3343, USA Fax: 1 (787) 756-7717;

*Department of Physics, University of Puerto Rico, PO BOX 23343, San Juan, PR 00931-3343, USA Fax: 1 (787) 756-7717;.

Publication History

  1. Issue published online: 11 JUL 2008
  2. Article first published online: 11 JUL 2008

Funded by

  • US ARO. Grant Number: W911NF-05-1-0017
  • NSF. Grant Number: DUE-0701525

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Keywords:

  • dielectric properties;
  • glass transition;
  • nanocomposites

Abstract

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 Tg. This change in Tg 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.

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