Contact
    Start Publications Crystallization of poly(epsilon-caprolactone) at the air-water ...
    ←  Publication Finder
    KSV NIMA

    Crystallization of poly(epsilon-caprolactone) at the air-water interface studied by IRRAS and GI-WAXS

    Year: 2020

    Journal: Polymer, Volume 196, MAY 20

    Authors: Hasan, N; Fuchs, C; Schwieger, C; Busse, K; Dolynchuk, O; Kressler, J

    Organizations: Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)German Research Foundation (DFG) [189853844 - TRR 102, FOR 1145]

    Keywords: Poly(epsilon-caprolactone); Langmuir film; Crystallization; IRRAS; GI-WAXS

    Poly (epsilon-caprolactone) (PCL) dissolved in chloroform was spread on the water surface of a Langmuir trough and after solvent evaporation, the surface pressure vs area (pi-A) Langmuir isotherm was recorded. An extended plateau region indicates a 1st order phase transition related to PCL crystallization as also confirmed by Brewster angle microscopy (BAM). Infrared reflection absorption spectroscopy (IRRAS) and grazing incidence wide angle X-ray scattering (GI-WAXS) reveal details of the PCL crystallization process on a molecular level. The IRRAS and GI-WAXS experiments confirm that crystallization occurs at the plateau region of the pi-A Langmuir isotherm. GI-WAXS also confirms that the polymer chains in the crystals are tilted by approximate to 21 degrees with respect to the water surface normal direction. This value is consistent with IRRAS data at a maximum compression state of approximate to 2 angstrom(2).
    View publication