The Effect of Anhydrous Ammonia on the Crystalline State Deformation of Nylons 6 and 6,6.
MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING
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The aliphatic polyamides Nylon-6 and -6,6 have been cold drawn using the new concept of reversible plasticization NH3. Two aspects were investigated The effect of NH3 plasticization on the stress-strain behavior of nylon 6,6 and the extent of NH3 absorption studied by x-ray analysis and reported for the structurally simpler nylon 6. X-ray analysis shows that ammonia is absorbed preferentially by the amorphous phase and that the plasticization has a significant effect on the mode of crystal unit cell orientation, the small angle void scattering and the interplanar spacings between sheets of hydrogen bonded chains. The effect of plasticization was documented by the lower yield stress, the higher draw ratio 8x and tensile modulus 10 GPa not attainable with unplasticized specimens.
- Atomic and Molecular Physics and Spectroscopy