Studying of De-wetting of a PS PMMA polymer bilayer

الملخص EN

The surface morphology evolution and de-wetting properties were studied of polystyrene (PS), poly(methyl methacrylate) (PMMA) thin films, and thin PS/PMMA bilayer films above silicon substrates by using Optical microscopy approach.

A PS film with 18.66 nm, PMMA with 82.5 nm and the bilayer of PS/PMMA with 85.33 nm (before annealing) have been deposited, shown a fit match with the model for the both single film and a good match for the bilayer film.

The heated bilayer above the glass transition temperature resulted metastable surface morphologies and growing nucleations of PS above PMMA surface, surface de-wetting were absorbed.

A longer annealing time led the film producing a network above the blower layer- phase separation occurred.