SIMULATION OF DIRECT ELECTRONIC-ENERGY TRANSFER BETWEEN DONORS AND ACCEPTORS EMBEDDED IN A RUBBERY PHASE NETWORK IN GLASSY PARTICLES

By direct electronic energy transfer fluorescence technique the tempor al behavior of donors in the presence of acceptors when both types of molecules are embedded in a rubbery phase PIB forming an interconnecte d network within glassy PMMA spheres is studied. The experimental resu lts are compared with simulations of the decay curves in (i) bag of ma rbles geometry where the PMMA particles are formed of glassy marbles, and the PIB fills the intervening spaces, (ii) the rubbery phase forms channels in the otherwise solid glassy PMMA sphere. For the latter ca se we analyzed both parallel and perpendicular PIB channels. The exper imental and simulated data are compared by both the fractal analysis m ethod and by obtaining the Klafter-Blumen dimension from the derivativ e of the ln(lnI) with respect to lnt. On the basis of our results we g ive preference to the rubbery PIB channels within solid glassy PMMA mo del over the bag of marbles model.