Dynamics in poly(propylene glycol) and silica oxide nanoparticles composite glassforming system

Results of broadband dielectric spectroscopy and rheological studies of poly(propylene glycol) + SiO\({_2}\) nanocomposites are presented. They show that the dynamics in high-concentrated composite is determined by confinement and adsorption effects, resulting from interactions of confined polymers...

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Bibliographic Details
Published in:arXiv.org 2017-02
Main Authors: Głuszek, M, Antosik, A, Żurowski, R, Szafran, M, Rzoska, S J, Zalewski, M, Pawlikowska, E, Starzonek, S
Format: Article
Language:English
Subjects:
Broadband
Fragility
Nanocomposites
Nanoparticles
Propylene
Rheological properties
Silica glass
Silicon dioxide
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Summary:Results of broadband dielectric spectroscopy and rheological studies of poly(propylene glycol) + SiO\({_2}\) nanocomposites are presented. They show that the dynamics in high-concentrated composite is determined by confinement and adsorption effects, resulting from interactions of confined polymers correspond with the host system at the interface between PPG and solid nanoparticles. The evolution of relaxation times follows the clear Vogel-Fulcher-Tammann pattern, what is proved by the supplementary activation energy temperature index analysis. The strong influence of nanoparticles on the transitional dynamics and the fragility in the ultraviscous domain was noted.
ISSN:2331-8422