ISSN:
0887-6266
Keywords:
small-angle X-ray scattering
;
long period
;
polyacrylonitrile
;
carbon fiber
;
stabilization
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A method has been proposed for evaluating the lattice distortion that yields broad X-ray scattering peaks. The long-period structure of thermally stabilized acrylic fibers has been analyzed by applying this method to the meridional small-angle X-ray scattering. The period length of the acrylic fibers increases during stabilization, while the distortion of the period remains unchanged, maintaining a coefficient of variation of about 0.3. It is concluded from a simulation using a model lattice that the cyclization of molecular segments proceeds faster in disordered regions than in crystalline regions, and that the cyclization in the crystalline regions proceeds preferentially from crystallities separated by smaller cyclized regions. © 1993 John Wiley & Sons, Inc.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/polb.1993.090311109
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