Network characterization of energetic poly (glycidyl azide)

Energetic poly(glycidyl azide) (PGA) elastomers with different crosslink densities were prepared by varying the NCO/OH reactive-groups ratio from 0.8 to 1.0. In the preparation of the elastomers, PGA chains were end-liked with a mixture of hexamethylene diisocyanate (HMDI) and trimethylol propane (TMP) at a fixed TMP/PGA mole ratio. The number average molar mass between junction points of the network chains $overline M_c$ was calculated using data obtained from swelling and uniaxial tensile tests and the results were compared. For the mechanical characterization of the networks, Mooney-Rivlin plots were prepared and the values of the constants $2C_1$ and $2C_2$ of PGA networks having different crosslink densities were determined.

PDF

___

1. E. J. Vandenberg,.F. Woods, U. S. Patent: 3, 645, 917 (1972).
2. M. B. Frankel, J. E. Flanagan, W. Hills, U. S. Patent: 4,268, 450 (1981).
3. M. B. Frankel, E. F. Witucki, V. Nuys, D. 0. Woolery, U. S. Patent: 4,379, 894 (1983).
4. R. A. Earl, U. S. Patent: 4, 486, 351 (1984).
5. D. C. Sayles, U. S. Patent: 4,707, 199 (1987).
6. E. Ahad, Technology of Polymer Compounds and Energetic Materials, ICT meeting, No. 5 (1990).
7. S. Brochu, G. Ampleman, Macromolecules, 29 5539 (1996).
8. M. S. Eroglu, 0. Giiven, J. Appl. Polym. Sci., 60 1361 (1996).
9. N. Kubota, T. Sonobe, Propellants, Explosives, Pyrotechnics, 13 172 (1988).
10. M. S. Eroglu, 0. Giiven, J. Appl. Polym. Sci., 61, 201 (1996).
11. L. A. Dee, B. L. biggers, M. E. Fiske, Anal. Chenm., 52, 572 (1980).
12. H. Kethandaraman, K. Venkataro, and C. B. Thanoo, Polymer Journal, 21, 829 (1989).
13. H. Tokui, T. Saitoh, et al., Technology of Polymer Compounds and Energetic Materials, ICT meeting, 1990, no:5.
14. M. S. Eroglu, 0. Giiven, Polymer, (will be published).
15. J. E. Mark, B. Erman, "Rubberlike Elasticity, A Molecular Primer" Wiley, New York, 1989.
16. P. J. Flory, and J. Rehner, J. Chem. Phys, 11, 521 (1943).
17. P. J. Flory, "Principles of Polymer Chemistry", Cornell University Press, Ithaca, NY, 1953.
18. B. Erman, P. J. Flory, Macromolecules, 19, 2342 (1986).
19. U. Eisele, "Introduction to Polymer Physics" Springer-Verlag, Berlin 1990.
20. L. R. g. Treolar, The physics of rubber elasticity, 3rd ed., clarendon Press, Oxford, 1975.
21. E. Schoder, G. Muller and K. Arndt Polymer Characterization, 2nd Revised Edition, Akademie-Verlag, Berlin, 1989.
22. J. P. Baker, L. H. hong, H. W. Blanch, and J. M. Prausnitz, Macromolecules, 27, 1446 (1994).