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  • Effect of plasma immersion ion implantation on polycaprolactone with various molecular weights and crystallinity

    Author(s)
    Kosobrodova, Elena
    Kondyurin, Alexey
    Chrzanowski, Wojciech
    Theodoropoulos, Christina
    Morganti, Elena
    Hutmacher, Dietmar
    Bilek, Marcela MM
    Griffith University Author(s)
    Hutmacher, Dietmar W.
    Year published
    2018
    Metadata
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    Abstract
    Polycaprolactone with five different molecular weights was spin-coated on silicon wafers and plasma immersion ion implanted (PIII) with ion fluence in the range 5 × 1014–2 × 1016 ions/cm2. The effects of PIII treatment on the optical properties, chemical structure, crystallinity, morphology, gel fraction formation and wettability were investigated. As in the case of a number of previously studied polymers, oxidation and hydrophobic recovery of the PIII treated PCL follow second order kinetics. CAPA 6250, which has the lowest molecular weight and the highest degree of crystallinity of the untreated PCL films studied, has the ...
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    Polycaprolactone with five different molecular weights was spin-coated on silicon wafers and plasma immersion ion implanted (PIII) with ion fluence in the range 5 × 1014–2 × 1016 ions/cm2. The effects of PIII treatment on the optical properties, chemical structure, crystallinity, morphology, gel fraction formation and wettability were investigated. As in the case of a number of previously studied polymers, oxidation and hydrophobic recovery of the PIII treated PCL follow second order kinetics. CAPA 6250, which has the lowest molecular weight and the highest degree of crystallinity of the untreated PCL films studied, has the highest carbonization of the modified layer after PIII treatment. Untreated medical grade PCL films, mPCL PC12 (Perstorp) and mPCL OsteoporeTM have similar chemical structures and crystallinity. Accordingly, the chemical and structural transformations caused by PIII treatment and post-treatment oxidation are almost identical for these two polymers. In general, PIII treatment destroys the nano-scale lamellar structure and results in a reduction of PCL crystallinity. Examination after washing PIII treated PCL films in toluene confirmed our hypothesis that cross-linking due to PIII treatment is significantly higher in semi-crystalline PCL as compared with amorphous polymers.
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    Journal Title
    Journal of Materials Science: Materials in Medicine
    Volume
    29
    Issue
    1
    DOI
    https://doi.org/10.1007/s10856-017-6009-1
    Subject
    Biomedical engineering
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/385715
    Collection
    • Journal articles

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