Bilayer films between thermoset epoxy and thermoplastic poly(vinylpyrrolidone) (PVP) were prepared by casting a stoichiometric mixture of the uncured diglycidyl ether of bisphenol A epoxy (DGEBA) and 4,4 0 -diaminodiphenylsulfone (DDS) on a PVP film and then curing the system in a two-step process under an inert gas atmosphere. The resultant interface was analyzed by electron microprobe analysis (EMP). The EMP results demonstrated that the interface formation was predominantly controlled in the initial cure stage, and that the diffusion at the interface was suppressed significantly after the epoxy formed the network structure. New EMP techniques were developed to analyze the polymer–polymer interface and to obtain not only the concentration profile but also the image of the interface. The limit of the resolution was 1.6 mm under the experimental conditions employed in this study.
Посилання на статтю:
Electron microprobe analysis as a novel technique to study the interface between thermoset and thermoplastic polymers / Hideko T. Oyam, T.N. Solberg, J.P. Wightman // Polymer. – 1999. – N 40. – P. 3001–3011.