The Dow Chemical Company,
Keywords: Epoxy Based Nanocomposites
Summary:There is an ever increasing demand for sealant materials with good barrier properties to protect the electronic devices, in particularly, different displays. In this talk, liquid crystalline (LC) epoxy-diglycidyl ether of 4, 4’-dihydroxy-a-methylstilbene (DGE-DHAMS or EDHAMS) based sealant material will be discussed. The combination of liquid crystalline polymers and clay nanoplatelets provided significantly improved barrier properties compared to the bisphenyl A based epoxy. The effects of nanoplatelets on the curing kinetics, liquid crystalline morphology, thermal stability and permeation rate were studied and the correlation between the free volume fraction measured by positron annihilation spectroscopy and the permeation rate was illustrated.