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High Compressive Strength Ordered Polymer Fibers and Films Via Sol Gel Microcomposite Processing

  • Robert F. Kovar (a1), Richard W. Lusignea (a1), R. Ross Haghighat (a1), Carlo Pantano (a2) and Edwin L. Thomas (a3)...

Abstract

Sol-gel glass microcomposite processing of polybenzobisthiazole (PBZT) films increased the compressive strength of PBZT/PEEK film laminates by more than four times. The presence of glass within microfibrillar regions of PBZT/sol-gel glass microcomposite films inhibited microbuckling during compression and greatly increased resistance to compressive failure.

Studies of PBZT/sol-gel glass microcomposite film morphology conducted at UMass by E.L. Thomas and at Penn State by C. Pantano indicated sol-gel glass precursor solutions had condensed within PBZT to produce a fine-scale (100 to 300Å) granular structure, homogeneously distributed throughout PBZT lamellae of microfibrils.

In a parallel effort, we have successfully extended sol-gel microcomposite processing technology for the improvement of compressive strength in ordered polymer fibers. Details concerning our results will be discussed.

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References

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1. Allen, S.R.. Filippov, A.G., Farris, R.J., Thomas, E.L., Wong, C.P., Barry, G.C., and Chenevey, E.C., Macromolecules, 14, 1135 (1981).
2. Allen, S.R., Fillppov, A.G., Farris, R.J., and Thomas, E.L., "The Strength and Stiffness of Polymers," Zachariades, A.E. and Porter, R.S., eds., Marcel Dekker, New York (1983).
3. Wolfe, J.F.. Loo, B.M., and Arnold, F.E., Macromolecules, 14, 915 (1981); Mark, J.E., and S.J. Pan, Macromolecules, Rapid Comm. 3, 681–685 (1982); Ning, Y.P., M.Y. Tang, C.Y. Jiang, and J.E. Mark, Journal App. Poly. Sci., 29, 3209–3212 (1984).
4. Land, Pottick Farris, R.J., "Alterations in the Structure and Mechanics of PBT Fibers due to the Collapse Process During Drying,: Nonwovens Symposium (April 1985).
5. Cohen, Y. and Thomas, E.L., Macromolecules 21, 433 (1988).
6. Lusignea, R.W., Research in Progress, "Processing Rod-Like Polymers," Contract No. F33615-84-C-5120. “Ordered Polymers for Large Mirror Substrates,” Contract No. F33615-85-C-5009.
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8. Drzal, L.T., “The Interfacial and Compressive Properties of Polybenzothiazole Fibers,” AFWAL-TR-86-4003 (1986).
9. Kovar, R.F.. Haghighat, R. and Lusignea, R.W., “Microcomposite Processing and Applications,” AFOSR Phase II Final Report No. AFB-0022-FM-8689-93.

High Compressive Strength Ordered Polymer Fibers and Films Via Sol Gel Microcomposite Processing

  • Robert F. Kovar (a1), Richard W. Lusignea (a1), R. Ross Haghighat (a1), Carlo Pantano (a2) and Edwin L. Thomas (a3)...

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