Investigation of the Effect of Nitrogen Plasma Treatmenton the Properties of Red-BS Dye Doped PMMA Film

Nitrogen dc plasma is used to modify the red BS dye doped Poly (methyl methacrylate)(PMMA) polymer surface and results are compared. Samples are treated in dc plasmagenerated in a plane parallel electrode plasma reactor of 20W power for different times.The modified surfaces are characterized by Fourier Transform Infrared Spectrometery(ATR-FTIR) and atomic force microscoply (AFM). Using the results of contact anglemeasurement, polar and dispersion parts of surface energy are calculated. RMS roughnessof sample surface is found to be changed noticeably by nitrogen plasma and the molecularstructure of the treated surfaces is affected. The contribution of the polar part of surfaceenergy is decreased with treatment time. The water contact angle is decreased noticeably bythis treatment while transmittance and reflectance of samples in the range of 200 to 2000nm are not changed.