Morphological changes induced in PPS by ion bombardment: amorphisation and recrystallization ability

摘要: Abstract Thin poly(paraphenylene sulfide) (PPS) films (Torelina, from Toray Co., Japan, 2 μm thick) were bombarded with energetic 1 H + (300 keV), 4 He (380 10 B (350 keV) and 40 Ar 2+ (700 ions at fluences ranging 12 to 8 × 14 ions/cm . The beam current density was kept 20 nA/cm in order avoid excessive heating outgassing damage. modified samples analysed by differential scanning calorimetry (DSC). Both the melting onset temperature enthalpy of fusion, that are related crystalline structure, decrease increasing ion fluence. This systematic study, made successive cooling cycles DSC measurements, shows polymer gradually lost its crystallinity ability for recrystallization, as fluence increases. Over a critical fluence, which depends on bombarding energy, amorphisation process accelerates above certain becomes completely amorphous. discussed modification PPS morphology occurs range where chemical degradation not significantly noticed Fourier transform infrared spectroscopy (FTIR) measurements. radii extracted results considering energy deposition density.