1970 Volume 27 Issue 304 Pages 492-497
Elastic moduli of the crystalline regions in the direction perpendicular to the chain axis (Et) for the γ-form of nylon 6 were determined by an x-ray diffraction method. The moduli observed were as follows:
Nylon 6 (γ-form): (110) ……Et=6.0×4kg/cmcm2 (24±1°C)
(200) ……Et=11.6×104kg/cmcm2 (20±1°C)
According to Bradbury et al., the (200) plane is normal to the hydrogen bond direction and the (110) plane makes an angle of about 30° with its direction, so that it is reasonable that the Et-value for the (200) Plane is much higher than that for (110) Plane.
The results for α-and γ-forms were compared; the theory of infinitesimal deformation of an orthogonally anisotropic elastic body could be applied to the following relationship between the elastic modulus (Eφ) and the angle (φ) of the normal to the corresponding lattice plane with the hydrogen bond direction.
