Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T02:20:03.573Z Has data issue: false hasContentIssue false
  • English
  • Français

In-Situ Synchrotron X-Ray Scattering Studies of Polybenzoxazole Fiber Spinning

Published online by Cambridge University Press:  15 February 2011

S. J. Nolan ,
C. F. Broomall ,
R. A. Bubeck ,
B. G. Landes ,
P. R. Rudolf ,
M. J. Mills  and
M. J. Radler
S. J. Nolan
Affiliation:
The Dow Chemical Company, Midland, MI 48674
C. F. Broomall
Affiliation:
The Dow Chemical Company, Midland, MI 48674
R. A. Bubeck
Affiliation:
The Dow Chemical Company, Midland, MI 48674
B. G. Landes
Affiliation:
The Dow Chemical Company, Midland, MI 48674
P. R. Rudolf
Affiliation:
The Dow Chemical Company, Midland, MI 48674
M. J. Mills
Affiliation:
The Dow Chemical Company, Midland, MI 48674
M. J. Radler
Affiliation:
The Dow Chemical Company, Midland, MI 48674
Get access

Abstract

Initial results are presented of in-situ wide angle x-ray scattering (WAXS) studies of structure and orientation development in the draw zone during fiber spinning of poly(p-phenylene benzobisoxazole) (PBO) in polyphosphoric acid (PPA). The diffraction patterns show strong [100] and [002] reflections. The coherence lengths found from the [100] and [002] reflections are consistent with those found by electron diffraction and suggest important elements of the microfibrillar morphology may already be present in the texture of the extrudate before coagulation. Increasing extrusion rate is found to produce little improvement in molecular orientation. Molecular orientation initially increases with increasing draw ratio from 1 to 10 but, remains constant for higher draw ratios. These results are compared to an affine deformation model during elongational flow.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 305: Symposium I – High-Performance Polymers and Polymer Matrix Composites , 1993 , 111
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Cohen, Y. and Thomas, E. L., Macromolecules, 21, 433 (1988).CrossRefGoogle Scholar
2. Cohen, Y. and Thomas, E. L., Macromolecules 21, 436 (1988).Google Scholar
3. Cohen, Y.,in Mat. Res. Soc. Symp. Proc..Vol. 134, 195 (1989).Google Scholar
4. Cohen, Y., To be published in Polymer.Google Scholar
5. Scherrer, P., Goettinger Nachrichten, 2, 98 (1918).Google Scholar
6. Hermans, P. H. and Platzek, P., Kolloid Z., 88, 68 (1939).CrossRefGoogle Scholar
7. Picken, S. J., Aerts, J., Visser, R. and Northholt, M. G., Macromol., 23, 3849 (1990).CrossRefGoogle Scholar
8. Cheng, S.Z.D., Wu, Z., Eashoo, M., Hu, S.L.C., and Harris, F., Polymer, 32, 1803 (1991).Google Scholar
9. Kuhn, W. and Grun, F., Kolloid Z.,101,248 (1942).CrossRefGoogle Scholar