| Abstract: | A three-dimensional polarized infrared technique was used to obtain information about molecular orientation in both uniaxially and biaxially drawn nylon 6 films. The 835 and 930 cm?1 bands were used to describe the orientation of the A (extended chain) conformation while absorptions at 1175 cm?1, and 1120 cm?1 and 1075 cm?1 were used to give some information about orientation of the B (twisted chain) conformation. On the basis of the 835 and 930 cm?1 bands, it was shown that the hydrogen-bonded sheets made up of chains in the A conformation are parallel to the film surface in the biaxially drawn film. Uniaxially drawn films obtained by drawing both at 100 and 150°C showed a high degree of chain alignment in the draw direction for the A conformation at draw ratios greater than 2.5. Some planar orientation was also observed in these uniaxially drawn films for both the A and B conformations at high draw ratios. |
