INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Epoxy networks modified by multifunctional polyhedral oligomeric silsesquioxanes (POSS) containing amine groups
Autor/es:
I. E. DELL'ERBA; R. J. J. WILLIAMS
Revista:
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Editorial:
Springer
Referencias:
Lugar: Dondrecht; Año: 2008 vol. 93 p. 95 - 100
ISSN:
1388-6150
Resumen:
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";}
@page Section1
{size:612.0pt 792.0pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;
mso-header-margin:36.0pt;
mso-footer-margin:36.0pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
The hydrolytic condensation of a
precursor synthesized by the reaction of equimolar amounts of
(3-aminopropyl)triethoxysilane and phenylglycidylether led to a distribution of
polyhedral oligomeric silsesquioxanes (POSS) containing 8 11 Si atoms,
functionalized with amine groups. About 57 % of the NH functionalities were
active for reaction with epoxy groups. The multifunctional amine-POSS was used
to modify an epoxy network obtained by the homopolymerization of
diglycidylether of bisphenol A initiated by benzyldimethylamine. The main
effect of POSS modification was an increase in both the glassy and rubbery
modulus explained, respectively, by the increase in cohesive energy and crosslink
densities.
