Document Type : Research Paper
Author
Al-Mustansiriya University - College Of Science.
Abstract
A novel polyimides of polystyrene with high thermal stability were prepared by the reaction of aminated polystyrene with Benzophenone tetracarboxylic dianhydride. The aminated polystyrene were prepared from the nitration of polystyrene followed by chemical reduction of its nitro groups. Infrared (FT-IR) spectra and thermogravimetric analysis (TGA) were used to characterize polymers . The prepared polymer exhibit good thermal and thermooxidative stability at polymer decomposition temperature greater than 550°C in air atmosphere . Another attractive feature is their high char yields 75% at 650°C in air atmosphere.
Keywords
- Mittal K. L., Ed., Polyimides and other High temperature polymers. Vsp/Brill: Leiden ,The Netherlands, Vol.5 (2009).
- M. K. Ghosh, K. L. Mittal (Eds), Polyimides: Fundemental and Apllications, Marcell Dekker (1996).
- S.M-Ataei,Y. Sarrafi, M. Hatami and L. A. Feizi, Thermal evaluation of new synthetic polyimides. Part1: polymer engineering(ichec9) ,Nov (2009).
- R. H. Voa, S .H. Goh and T. S. Chung Polymer Engineering and Sience 13, 40, 1318-1329 (2000).
- C. P. Yang and W. Yang, US Patent, 6, 093, 790 (2005).
- K. L. Mittal (Eds), Polyimides and Other High temperature Polymers: Synthesis, Characterization and Application. Vol. 1 Vsp, Vtrecht (2001).
- H-Choi, I. Sik chung, K. Hong ”Soluble polyimides from unsymmetrical diamine containing benzimidazole ring and trifluoromethyl pendent group “polym 49(2008).
- Z .Jia, Y. Gu and M. P. Srinivasan, in Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, K. L. Mittal (Eds), Vol 3. P111-130, Vsp, Utrecht (2005).
- R .H. Vora, P. D. Sawant, S. H. Goh. And M. Vora, in Polyimides and Other High Temperature Polymers: Synthesis, Characteriztion and Applications, K .L. Mittal (Eds.), Vol. 3, pp.201-265, Vsp, Utrecht (2005).
- E. T. Ryan , A. J. Mc Kerrow, J. Leu and P. S. Ho, in: Low Dielectric Constant Materials for IC. Application, P.S. Ho, J. Leu and W .W. Lee (Eds), pp.23-74, Springer, Berlin (2003).
11. S. Ando, T. Sawada, and S. Sasaki, Polym. Adv. Tech. 169, ibid, 122, 319 (2001).
12. Baelr-Jones T,Hochberg M, Wang G, Lawson R, Liao Y. Sullivan P, Dalton L, jen A, Scherer. A, Optical modulation and detection in Slotted silicon Wave guided, Optics Express, 13, 5216-5266 (2005).
13. P. Zarchan (Eds.), American institute of Aeronautics and Astronautics, Reston, VA (2001).
14. C.H.M. Jenkins (Eds), Gassamer: Structures, Membrane and inflatable structures Technology for Space Applications progress in Astronautics Progress, Vol. 191.
15. C. E. Kennedy and K. Terwilliger, J. Solar Energy. Eng.127, 262 (2005).
16. C. E. Sroog, in Proceeding of the 4th European Technical Symposium on Polyimides and High Performance Polymers, held at university of Monpellier,Vol.2.p.266(1996)\
17. Wei Cui, US Patent 0166792 A1 (2003).
18. M. J. M. Abadie, V. Y. Voytekunas and A. L.Rusanov, ”state of the Art organic matrices for high-performance composites: a reviewIranian polymer Journal, Vol.15,no1, pp65-77,(2006).
)
