ポリプロピレン/ポリアミド6ブレンド繊維の構造に及ぼすブレンド比の影響

抄録

The structures of polypropylene/polyamide 6 (hereafter “PP/PA6”) blend fibers with different blending ratios are investigated. Crystalline orientation is hardly observed in the undrawn PA6 and PP fibers, while it is observed even in the undrawn blend fibers at the draft ratio as low as 3.0 to 4.0. Maybe this is because the crystallization of PP phase is caused at high temperature by high chemical potential. Also maybe this is because the draft deformation of PP is substantially larger than that of PA6 due to lower viscosity of PP than PA6. Two endothermic peaks are observed in the drawn blend fibers containing 60% or less of PA6. It is considered that the peak on the lower temperature side corresponds to an imperfect or very fine crystal of PA6 and it is generated by drawing the blend fiber because the PP is easily mixed with the PA6 phase as the content of PP increases. Since the α-dispersion peaks of the dynamic mechanical properties of PA6 and PP are apart from each other, it is found that both phases are not mixed with from an order of magnitude of molecular chain.