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AuthorAl-Maadeed, M.
AuthorAl-Thani, N. J.
AuthorBader, M.
Available date2024-07-10T07:56:51Z
Publication Date2010
Publication NameAdvanced Materials Research
ResourceScopus
Identifierhttp://dx.doi.org/10.4028/www.scientific.net/AMR.83-86.505
ISSN10226680
URIhttp://hdl.handle.net/10576/56567
AbstractIn this paper the results of structural changes in ultra high molecular polyethylene (UHMWPE) upon gamma irradiation and storage in nitrogen environment are reported. Based on differential scanning calorimetry (DSC), wide angle x-ray scattering (WAXS), gel content, fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM), we show that upon gamma irradiation crystallinity percentage increases by 20% at high doses due to aging, at low doses up to 50 kGy there is no significant changes. Lamellar thickness increases with the dose, possibly due to chain scission and the addition of new molecular segments to the lamellae. Upon storage in nitrogen DSC data confirmed the appearance of new smaller lamellae. Crosslinking was achieved by irradiation but the ratio of scission to crosslinking is higher after aging. This was confirmed by the increase in the oxidation index and the high brittle behavior of the polymer after aging where fibrous surface was noticed.
Languageen
PublisherTrans Tech Publications
SubjectUHMWPE (Ultra High Molecular Weight Polyethylene)
Gamma Irradiation
Structural Changes
Crystallization
Lamellar Thickness
Crosslinking
Chain Scission
FTIR (Fourier Transform Infrared Spectroscopy)
SEM (Scanning Electron Microscope)
DSC (Differential Scanning Calorimetry)
WAXS (Wide Angle X-ray Scattering)
Nitrogen Atmosphere
TitleMicrostructural investigation of gamma-irradiated ultra high molecular weight polyethylene in nitrogen atmosphere
TypeConference
Pagination505-523
Volume Number83-86
dc.accessType Abstract Only


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