Study on the miscibility of poly(2-hydroxyethyl methacrylate)/poly(styrene-co-acrylamide) blends by nonradiative energy transfer fluorescence spectroscopy

摘要

The miscibility of poly(2-hydroxyethyl methacrylate)/poly(styrene-co-acrylamide) (PHEMA/ PSAm) blends was investigated by nonradiative energy transfer fluorescence spectroscopy using anthracene-labeled PHEMA and carbazole-labeled PSAm. The results show that the ratio of the carbazole and anthracene emission intensity, I_c/I_a, passes through a minimum at 47 to 57 mol-% of acrylamide in PSAm copolymers in the blends, indicating that a 'miscible window' exists. It also was found that the results are consistent with those obtained by differential scanning calorimetry. The driving force for the miscibility of PHEMA/PSAm may be explained with a mean-field theory.