The structural relaxation of glassy, spin-cast thin polymer films was investigated using spectroscopic ellipsometry. Results from poly(tertiary-butyl methacrylate) (P(tert-BMA)) and poly(normal-butyl methacrylate) (P(norm-BMA)) polymers and also blends of P(tert-BMA) and poly(methyl methacrylate) (PMMA) are compared. It is found that P(tert-BMA) films exhibit almost no relaxation over a period of several days, compared with PMMA-rich films, which exhibit significant amounts of relaxation. Blends show intermediate amounts of relaxation.
- Izaro López García
- Joseph L Keddie
- Michele Sferrazza