分子長の異なるモノマーから合成した固体飛跡検出器の開発と重粒子線による損傷解析

Our interests for years lay to investigate the reason why CR-39 polymer has such high sensitivity as plastic nuclear track detector(PNTD) on chemical structural aspects. We developed three PNTDs from three diacrylate compounds as monomers bearing different molecular length as well as different numbers of internal ether bonds. The polymer products obtained were colorless and transparent with 3-D molecular structures as CR-39 and different lattice each other. Our purpose of the current study was to investigate structural damages caused in newly prepared PNTD s and CR-39 by irradiation of Nitrogen ion (6 MeV/n, fluence of 5×10 11 cm-2). The structural damage by irradiation was analyzed by the magnitude of the relative absorbance of specific functional groups such as ester, C-O, ether and C-H bonds by means of FT-IR (ATR) method. The correlation between the relative absorbance and the molecular length of the monomers were discussed.