P.K.D. V. Yarlagadda
This paper presents a preliminary study on the dielectric properties and curing of three
different types of epoxy resins mixed at various stoichiometric mixture of hardener,
flydust and aluminium powder under microwave'energy. In this work, the curing pro-
cess of thin layers of epoxy resins using microwave radiation was investigated as an
alternative technique that can be implemented to develop a new rapid product devel-
opment technique. In this study it was observed that the curing time and temperature
were a function of the percentage of hardener and fillers presence in the epoFy resins.
Initially dielectric propel-ties of epoxy resins with hardener were measured which was
directly correlated to the curing process in order to understand the properties of cured
specimen. Tensile tests were conducted on the three different types of epoxy resins
with hardener and fillers. Modifying dielectric properties of the mixtures a significant
decrease in curing time was observed. In order to study the microstructural changes
of cured specimen the morphology of the fracture surface was carried out by wing
scanning electron microscopy.