Solvent-induced sensitization of ion tracks in PET analyzed by small-angle X-ray scattering and differential scanning calorimetry
The influence of the organic solvent N,N,-dimethylformamide (DMF) on ion tracks in polyethyleneterephthalate (PET) was investigated by small-angle X-ray scattering (SAXS) and by differential scanning calorimetry (DSC). The experiments were performed on non-irradiated, irradiated and DMF-treated samples. After ion irradiation the SAXS pattern changed considerably. From the comparison of the SAXS pattern of the irradiated samples before and after DMF sensitization, it can be concluded that DMF induces a process restoring the lamellar structure. With DSC we determined the melting enthalpy. Compared with non-irradiated PET the melting enthalpy of irradiated samples decrease. By DMF-sensitization this decrease of melting enthalpy is enhanced.