Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-27T01:57:50.564Z Has data issue: false hasContentIssue false
  • English
  • Français

Pbzt/Polyamide Thermoplastic Micro-Composites - An Outgrowth of Molecular Composites Development

Published online by Cambridge University Press:  21 February 2011

William C. Uy  and
E. R. Perusich
William C. Uy
Affiliation:
E. I. du Pont de Nemours & Co., Inc., Experimental Station, P. O. Box 80302, Wilmington, DE 19880-0302
E. R. Perusich
Affiliation:
E. I. du Pont de Nemours & Co., Inc., Experimental Station, P. O. Box 80302, Wilmington, DE 19880-0302
Get access

Abstract

Molecular composites are dispersions of rigid-rod polymer molecules in a matrix of flexible coil polymers, formed by the coagulation of a solution containing these components. Where there is aggregation of the rigid-rod molecules, such composites are called micro-composites (MC's). These composites offer the potential for better economics and improvements in composite processing, and possibly performance, over conventional ‘string and glue’ composites. This paper describes work performed under contract to the U. S. Air Force to develop PBZT/thermoplastic molecular composites into a viable technology.

A commercially viable MC spinning and heat-treatment process has been defined based on a novel mixed solvent/quaternary solution technology developed by Du Pont. Advantages of this process include better economics, superior processing performance, and improved MC fiber tensile properties versus prior art. PBZT/polyamide MC fibers with strength/modulus of 332 ksi/29 Msi have been produced using this process. Adhesion equivalent to that obtained in conventional composites has been demonstrated. Uni-axial properties achieved to date compare favorably with conventional ‘string and glue’ PBZT/epoxy composites although compressive and shear strengths may be limiting factors in MC applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 171: Symposium O – Polymer Based Molecular Composites , 1989 , 153
Copyright
Copyright © Materials Research Society 1990

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

REFERENCES

1. Uy, W.C., Air Force Report AFWAL-TR-82-4154, Part I, 1982.Google Scholar
2. Mammone, J.F. and Uy, W.C., Air Force Report AFWAL-TR-82-4154, Part II, 1982.Google Scholar
3. Wolfe, J.F. and Loo, B.H., U.S. Patent No. 4,225,700 (30 January 1980).Google Scholar
4. Helminiak, T.E., Benner, C.L., Arnold, F.E. and Husman, G.E., U.S. Patent No. 4,207,407 (10 June 1980).Google Scholar
5. Flory, P.J., Macromolecules 11, 1138 No. 6 (1978).Google Scholar
6. Hwang, W.F., Wiff, D.R. and Verschoore, C., Polymer Engineering and Science, 23 No. 14, 789 (1983).Google Scholar
7. Small, P.A., J. Applied Chem., 3, 71 (1953).Google Scholar
8. Miller, B., Tallent, M.A., Hewitt, K.P., Adams, K.L. and Desio, G.A., Textile Research Institute Report No. 6 (1 July 1985).Google Scholar
9. Uy, W.C., U.S. Patent No. 4,810,735 (7 March 1989).Google Scholar
10. Hwang, W.F., Helminiak, T.E. and Wiff, D.R., U.S. Patent No. 4,631,318 (23 December 1986).Google Scholar
11. Hwang, W.F., 6th Industry/Government Review of Thermoplastic Matrix Composites, Arlington, VA, 1989 (unpublished).Google Scholar
12. Chang, I.Y. and Lees, J.K., J. of Thermoplastic Composite Materials, 1, 277 (1988).Google Scholar
13. Katz, M., E.I. du Pont de Nemours & Co. (unpublished).Google Scholar
14. Kumar, S., SAMPE Quaterly, 3 (1989).Google Scholar