Nanofiller effect on the glass transition of a polyurethane

Nanofiller effect on the glass transition of a polyurethane The effect of silica nanofiller on the glass transition of a polyurethane was studied by DSC. The pristine polymer exhibits a single glass transition at about –10°C. Uniform SiO2 spheres with different average sizes and narrow size distributions were synthesized in solution by the Stöber method (1). Both the effects of silica content within the polymer and particle size were investigated, as well as two different surface treatments. Scanning electron microscopy (SEM) clearly confirms the presence of the particles within the polymer matrix, showing uniform distribution and no agglomeration. While shifting of the glass transition has been reported by many authors, we have not seen any noticeable shift in this polymer. Surprisingly, we found no relevant effects when either increasing the filler content or changing the particle size. Different amounts of particles with average diameters of 175, 395 and 730 nm did not affect the glass transition temperature of the pristine polymer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Thermal Analysis and Calorimetry Springer Journals

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Publisher
Springer Journals
Copyright
Copyright © 2007 by Springer-Verlag
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry; Polymer Sciences; Measurement Science, Instrumentation
ISSN
1388-6150
eISSN
1572-8943
DOI
10.1007/s10973-006-7805-x
Publisher site
See Article on Publisher Site

Abstract

The effect of silica nanofiller on the glass transition of a polyurethane was studied by DSC. The pristine polymer exhibits a single glass transition at about –10°C. Uniform SiO2 spheres with different average sizes and narrow size distributions were synthesized in solution by the Stöber method (1). Both the effects of silica content within the polymer and particle size were investigated, as well as two different surface treatments. Scanning electron microscopy (SEM) clearly confirms the presence of the particles within the polymer matrix, showing uniform distribution and no agglomeration. While shifting of the glass transition has been reported by many authors, we have not seen any noticeable shift in this polymer. Surprisingly, we found no relevant effects when either increasing the filler content or changing the particle size. Different amounts of particles with average diameters of 175, 395 and 730 nm did not affect the glass transition temperature of the pristine polymer.

Journal

Journal of Thermal Analysis and CalorimetrySpringer Journals

Published: Jan 1, 2007

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