Paper number 1279

MICROMECHANICAL AND MICROSPCOPIC EFFECTS OF PREPROCESSING ON INTERFACIAL SHEAR STRESS OF GLASS FIBER-CYANATE ESTER RESINS COMPOSITE

P.Bartolomeo, J.F.Chailan, J.L. Vernet

Laboratoire de Chimie Appliquée, Université de Toulon et du Var
83957 La Garde, France

Summary

In this study, effects of process conditions before cure stage are investigated by means of different approaches. Microbond pull out test is used to characterize Interfacial Shear Stress at different resin conversion and after preprocesses. It's shown that before gel point IFSS depends but on resin whereas at high conversion, IFSS is system depend. IFSS versus conversion show a S-shaped curve. Vacuum process before cure stage magnified IFSS by 1,5-1,7. Shrinkage of microdroplet at cooling has been also simulated. Effects of interphase thickness and Young modulus are studied. Then, dielectric spectroscopy is used to characterize interpenetrating mechanism between sizing and matrix. Effects of process stage are overlaid and analyzed in case of dielectric relaxation and ionic conductivity measurements. To conclude, an interaction mechanism between sizing and matrix is proposed.

Keywords

pull out, vacuum effects, sizing, dielectric spectroscopy, shrinkage, thermosetting resin.