Authors:
J. González-Irún Rodríguez

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P. Carreira Universidade da Coruña Departamento of Industrial Engineering II, Escola Politécnica Superior Ferrol Spain 15403 Ferrol Spain 15403

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A. García-Diez Universidade da Coruña Departamento of Industrial Engineering II, Escola Politécnica Superior Ferrol Spain 15403 Ferrol Spain 15403

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D. Hui University of New Orleans Department of Mechanical Engineering New Orleans USA 70148 New Orleans USA 70148

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R. Artiaga Universidade da Coruña Departamento of Industrial Engineering II, Escola Politécnica Superior Ferrol Spain 15403 Ferrol Spain 15403

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L. Liz-Marzán Universidade de Vigo Departamento de Química Física, Facultad de Ciencias Vigo Spain 36310 Vigo Spain 36310

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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 –10C. Uniform SiO2 spheres with different average sizes and narrow size distributions were synthesized in solution by the Stber 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.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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