ナイロン6の等温結晶化過程の動的粘弾性

概要

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The variation of dynamic viscoelasticity during isothermal crystallization of Nylon6 is investigated. The time dependence of the crystallinity evaluated from DSC(x_H) is compared with that of the crystallinity defined by dynamic measurements(x_G) as (G_t-G_0)/(G_x- G_0) where G_t, G_0 and G_∞ are the moduli at concerning time, in the initial molten and fully crystallized states, respectively. The onset of the increase in x_G is retarded as compared with x_H, while x_G becomes identical with x_H in the later crystallization process. These features are commonly observed in Nylon6 and polybutene-1 varying significantly in viscoelasticity before crystallization as well as the size of spherulites. The relation between x_G and x_H is well explained by considering the morphological change of system resulting from the growth of spherulite domains.
社団法人日本材料学会の論文
2005-01-15