小角光散乱法によるポリアミド6射出成形品の変形挙動研究

Abstract

Deformation behaviors of microstructures of polyamide 6 (PA6) and elastomer-alloyed PA6 were investigated using small angle light scattering (SALS) techniques. The SALS pattern shows that PA6 has incomplete spherulitic structures. The change of SALS pattern with elongation suggests that the structures deform with external deformation up to yield strain. Then the SALS patterns discontinuously change with necking elongation and suggest that the apparent size of the spherulitic structures becomes very larger and that the degree of orientation decreases. Next lobe-streak patterns, which are considered to be due to sheaf-like structures, were observed beyond the necking elongation. These changes in SALS patterns can be explained by the reconfiguration models of adjoining spherulitic structures presented in this paper. The SALS patterns of elastomer-alloyed PA6 similarly show the existence and deformation of incomplete spherulitic structures up to yield strain. However, neither spherulitic nor sheaf-like structures were observed in the SALS patterns beyond the yield strain.