| 초록 |
Interpenetrating polymer networks(IPN) based on diglycidyl ether of bisphenol-A(DGEBA) and dimethacrylate prepolymer were blended and cured by using benzoyl peroxide(BPO) and 4,4·-methylenedianiline(MDA) as initiating and curing agent, respectively. The morphology of the IPNs was observed by SEM and showed the micro-separated phase, in which 10-20 nm size in diameter of dimethacrylate islands uniformly dispersed. The size of the separated islands strongly depends on the molecular weight and the type of the dimethacrylate prepolymer. In the presence of water molecules, strongly polarized molecules, the interfacial energy balance shoud be broken and epoxy-rich phase tends to form it own separated phase, finally from contineous phase to islands, as increased in the loading of the water molecule into the blends. The observed change in morphology indicates that the small polarized molecules could influence on the interface of the two phases in the binary blends. Finally nano pores were formed at each interface of the adjacent islands in the cured polymer matrix. |
