Lanthanide triflates as curing initiators for solid DGEBA resin: Thermal and mechanical characterization

✍ Scribed by S. J. García; A. Serra; J. Suay

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 460 KB
• Volume: 105
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.26367

✦ Synopsis

Abstract

A new class of cationic initiators, lanthanide triflates, has been studied in the curing of diglycidyl ether of bisphenol‐A (DGEBA). Two metal salts (Erbium and Ytterbium (III) trifluoromethanesulfonate) in various proportions (0.5, 1, and 2 parts per hundred of resin) have been used and the thermal and mechanical properties of the thermosets compared to a common solid epoxy system (crosslinked with o‐tolylbiguanide). The kinetics of these processes has been evaluated by the isoconversional method that has been proved to be an excellent tool to predict the principal curing parameters (conversion/time/temperature). Their mechanical properties have been evaluated by dynamic mechanical thermal analysis (DMTA), stress‐strain curves, impact resistances and adhesion to metallic substrates, and the thermal characteristics were measured by calorimetry (DSC) and thermogravimetry (TGA). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007