Browsing by Author "Oztarhan A.M."

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    Polymeric thermal analysis of C + H and C + H + Ar ion implanted UHMWPE samples
    (2007) Kaya N.; Oztarhan A.M.; Urkac E.S.; Ila D.; Budak S.; Oks E.; Nikolaev A.; Ezdesir A.; Tihminlioglu F.; Tek Z.; Cetiner S.; Muntele C.
    Chemical surface characterization of C + H hybrid ion implanted UHMWPE samples were carried out using DSC (differential scanning calorimeter) and TGA (thermal gravimetric analysis) techniques. Samples were implanted with a fluence of 1017 ion/cm2 and an extraction voltage of 30 kV. The study of TGA and DSC curves showed that: (1) Polymeric decomposition temperature increased, (2) Tm, ΔCp and ΔHm values changed while ΔCp and ΔHm increased. Tg value could not be measured, because of some experimental limitations. However, the increase in ΔHm values showed that Tg values increased, (3) the branch density which indicated the increase in number of cross-link (Mc) decreased in ion implanted samples and (4) increase in ΔHm values indicated increase in crystallinity of implanted surface of UHMWPE samples.