Small molecule desorption from a swelling polymeric glass in polymer solution: Energy transfer method

Direct energy transfer (DET) method conjunction with fast transient fluorescence (FTRF) technique were used to study small molecule desorption from a swelling poly(methyl methacrylate) (PMMA) glass in polymer solution, which is consist of naphthalene (N)-labeled PMMA chains in chlorofrom–heptane mixture. Desorption coefficients, Dd of pyrene (P) desorbing from the swelling PMMA glass prior to dissolution were measured and found to be 8.3 × 10−8 and 1.3 × 10−5 cm2 s−1 in short and long time regions, respectively.