Mechanical Properties and Structure of Nylon 6/Aromatic Polyamide Blend Film

Abstract

Recently, much attention has been paid to nylon 6 (Ny 6) and poly (m-xylene adipamide) (MXD) blend films because of their high gas barrier properties. When the blend film is biaxially stretched, it exhibits a mechanical anisotropy, i. e., a directional dependent cleaving. We report here the cleaving property of Ny 6/MXD blend films. The difference in the force and the deviation of cleaving parallel and perpendicular to the machine direction (MD) was studied as a function of the composition. It was found by electron microscopy that the blend films had a plate-like structure consisting of MXD domains. The domain is highly oriented along MD. The difference of cleaving anisotropy is partially due to this domain structure.