F. Sava, R. Cristescu, G. Socol, R. Radvan, R. Savastru, D. Savastru, Structure Of Bulk And Thin Films Of Poly-Methyl-Methacrylate (PMMA) Polymer Prepared By Pulsed Laser Deposition, Journal of Optoelectronics and Advanced Materials,  4/4 (2002) 965-970 


Title: Structure of bulk and thin films of poly-methyl-methacrylate (PMMA) polymer prepared by pulsed laser deposition

Abstract: Homogeneous thin films have been obtained by UV-excimer pulsed laser deposition from a PMMA bulk material. The structure of films is at variance with the structure of the bulk polymer. The size of the ordered domains, as well as the structural features, evidenced by X-ray diffraction in the deposited films, depend on the fluence of the ultraviolet laser pulse used in the ablation process and on the temperature of the substrate. The radial distribution functions of the bulk PMMA material and thin films show differences in the short range order ascribed to the breaking of the polymer chains and monomer dissociation during deposition process.

Keywords: PMMA; pulsed laser deposition; X-ray diffraction; structure; thin films