Characterization of denture acrylic resin surfaces modified by glow discharges

Date
1997
Authors
Süzer, Ş.
Özden, N.
Akaltan, F.
Akovali, G.
Advisor
Instructor
Source Title
Applied Spectroscopy
Print ISSN
0003-7028
Electronic ISSN
Publisher
Sage Publications, Inc.
Volume
51
Issue
11
Pages
1741 - 1744
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

Resin samples prepared by compression molding using a poly (methyl methacrylate) (PMMA) denture base material were exposed to radio-frequency (rf) glow discharges to improve the wettability of the material. Fourier transform infrared (FT-IR) reflectance, X-ray photoelectron spectroscopy (XPS), and contact-angle measurements have been employed to characterize the changes introduced by the glow discharge plasma. FT-IR measurements cannot detect any modification. XPS reveals an increase in the O/C atomic ratio. Contact angles of the plasma-treated samples are always lower when compared with untreated ones. The increased O atomic concentration is attributed to formation of -COH groups on the surface during plasma treatment. The O/C atomic ratio decreases upon heating the samples in vacuum to 100 °C for 1-2 min and exposing the samples to liquid CH2Cl2 for 1-2 min. Exposure to distilled water for prolonged periods causes a slight decrease during the initial 1-20 days but levels off to a constant value up to a period of 60 days. Plasma treatment seems to offer a durable increase in the wettability for these materials left in air or distilled water.

Course
Other identifiers
Book Title
Keywords
Plasma modification, PMMA, XPS, Chemical modification, Contact angle, Glow discharges, Plasma applications, Polymethyl methacrylates, Wetting, X ray photoelectron spectroscopy, Denture base materials, Dental composites
Citation
Published Version (Please cite this version)