Epoxy networks based on solutions of silsesquioxanes functionalized with 3-glycidoxypropyl groups in diglycidylether of bisphenol A (DGEBA) |
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| Authors: | Adriana N Mauri Carmen C Riccardi Roberto J J Williams |
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| Affiliation: | (1) Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J. B. Justo 4302, (7600) Mar del Plata, Argentina e-mail: williams@fi.mdp.edu.ar, AR |
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| Abstract: | Summary
In previous publications we reported the synthesis and characterization of silsesquioxanes derived from the hydrolytic condensation
of (3-glycidoxypropyl) trimethoxysilane (GPMS) using diglycidylether of bisphenol A (DGEBA) as a solvent 1,2]. The reaction
product has aliphatic epoxy groups supplied by the silsesquioxane and aromatic epoxy groups supplied by the solvent. Solutions
containing 0, 25 and 50% aliphatic epoxy groups, were cured with different hardeners: methyltetrahydrophthalic anhydride (MTHPA),
ethylenediamine (EDA) and benzyldimethylamine (BDMA). Silsesquioxane-modified epoxy networks showed a significant increase
in the elastic modulus in the rubbery state, the abrasion resistance and the development of strain hardening in uniaxial compression
tests.
Received: 28 September 2000/Accepted: 27 October 2000 |
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