Tuning of cross-linking and mechanical properties of laser-deposited poly (methyl methacrylate) films

The chemical composition, amount of cross-linking and its influence on the mechanical properties of poly(methyl methacrylate) (PMMA) thin films produced by pulsed laser deposition (PLD) at a wavelength of 248nm under ultrahigh vacuum were investigated by infrared spectroscopy, scanning electron micr...

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Bibliographic Details
Published in:Journal of applied physics 2005-03, Vol.97 (6), p.063501-063501-4
Main Authors: Süske, Erik, Scharf, Thorsten, Krebs, Hans-Ulrich, Panchenko, Elena, Junkers, Tanja, Egorov, Mark, Buback, Michael, Kijewski, Harald
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
Bulk modulus
CHEMICAL COMPOSITION
CHROMATOGRAPHY
CROSS-LINKING
Crosslinking
ENERGY BEAM DEPOSITION
Fluence
Infrared analysis
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LASER RADIATION
LASERS
Mechanical properties
METHACRYLIC ACID ESTERS
Modulus of elasticity
MOLECULAR WEIGHT
Nanoindentation
PMMA
Polymethyl methacrylate
PULSED IRRADIATION
Pulsed laser deposition
Pulsed lasers
SCANNING ELECTRON MICROSCOPY
Size exclusion chromatography
THERMAL GRAVIMETRIC ANALYSIS
Thermogravimetric analysis
THIN FILMS
Ultrahigh vacuum
VAPOR DEPOSITED COATINGS
YOUNG MODULUS
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Summary:The chemical composition, amount of cross-linking and its influence on the mechanical properties of poly(methyl methacrylate) (PMMA) thin films produced by pulsed laser deposition (PLD) at a wavelength of 248nm under ultrahigh vacuum were investigated by infrared spectroscopy, scanning electron microscopy, size-exclusion chromatography, thermogravimetric analysis, and nanoindentation experiments. The films consist of two components, one fraction with a molecular weight well below that of the target material and a second fraction, which is cross-linked. Compared to bulk material, the Young’s modulus of the film is increased. The amount of cross-linking in the film can be tuned by the applied laser fluence leading to changes of the mechanical properties.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1850609