Abstract
Using an X-ray fiber diffractometer, 2D intensity distributions of polyacrylonitrile (PAN) fibers are measured in reciprocal space in the plane containing the fiber axis. The equatorial intensity distributions show four relatively sharp reflections and three diffuse maxima. The sharp reflections correspond to a pseudohexagonal 2D lattice of intermolecular packing. The diffuse minima are due to the Laue scattering of a rotational disorder in this lattice. The off-equatorial intensity distribution is mainly determined by intramolecular scattering. A comparison with calculated 2D intensity distributions for various conformations of short PAN chain segments reveals that the predominant conformation is planar zigzag
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
