Hostname: page-component-7479d7b7d-fwgfc Total loading time: 0 Render date: 2024-07-11T21:59:43.785Z Has data issue: false hasContentIssue false
  • English
  • Français

A Study of Polyamic-Acid Interchange Reactions

Published online by Cambridge University Press:  15 February 2011

John A. Kreuz  and
David L. Goff
John A. Kreuz
Affiliation:
Du Pont Electronics, E. I. du Pont de Nemours and Company, Circleville Research Laboratory, Circleville, OH 43113, and Experimental Station Laboratory, Wilmington, DE 19898.
David L. Goff
Affiliation:
Du Pont Electronics, E. I. du Pont de Nemours and Company, Circleville Research Laboratory, Circleville, OH 43113, and Experimental Station Laboratory, Wilmington, DE 19898.
Get access

Extract

C. C. Walker[1] first demonstrated that size exclusion chromatography (SEC) is an effective analytical technique for observing molecular weight distribution changes (MWD) of polyamic-acids with time. The specific polyamic-acid studied was that based on pyromellitic dianhydride and 4,4′- oxydianiline (PMDA/ODA), and the MWD narrowed on aging. Essentially, a decrease occurred in the weight average molecular weight (Mw), but no change took place in the number average molecular weight (Mn). Redistribution of molecular weight was postulated to be due to an equilibration reaction arising from the reversibility of amic-acids[2]. Additional data on Mw decreases with time of polyamicacids other than PMDA/ODA have been reported by Miwa and Numata[3] and Kreuz[4], and although trends are similar, rates of equilibrations of various polyamic-acids appeared to be partially due to backbone structure. The dianhydrides of 3,3′,4,4′-biphenyl dianhydride (BPDA) and 3,3′,4,4′- oxydiphthalic anhydride (ODPA) tended to give more stable polyamic-acid solutions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 227: Symposium J – Materials Science of High Temperature Polymers for Microelectronics , 1991 , 11
Copyright
Copyright © Materials Research Society 1991

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. Walker, C. C., J. Polym. Sci. A, 26, 1649 (1988).Google Scholar
2. Cotts, P. M. and Volksen, W., ACS Symp. Ser., 242, 227–237 (1984).Google Scholar
3. Miwa, T. and Numata, S., Polymer, 30, 893 (1989).Google Scholar
4. Kreuz, J., J. Polym. Sci. A, 28, 3787 (1990).Google Scholar
5. Fukami, A., J. Polym. Sci., Polym. Chem. Ed., 15, 1535 (1977).Google Scholar
6. Visser, A. C. de, Gregonis, D. E., and Driessen, A. A., Makromol. Chem., 179, 1855 (1978).CrossRefGoogle Scholar
7. Babu, G. N. and Samant, S., Eur. Polym. J., 17, 421 (1981).Google Scholar
8. Babu, G. N. and Samant, S., Makromol. Chem., 183, 1129 (1982).Google Scholar
9. Yang, Chin-Ping and Sheng-Huei, Hsiao, J. Appl. Polymer Sci., 31, 979 (1986).CrossRefGoogle Scholar
10. Nagano, H., Kawai, H., Yonezawa, K., Symposium On Recent Advances In Polyimides And Other High Performance Polymers, Reno, Nevada, July 13–16, 1987.Google Scholar
11. Sato, Takushi, Kawamata, Motoo, Takahashi, Shigeru, Ibl, Akira, Naito, Mituyuki, Shindo, Kazumi, Shishido, Shigeyuki, European Patent Application, #0125599, c/o Mitsui Toatsu Chemicals, Inc., November 21, 1984.Google Scholar
12. Atsushi, Suzuki and Yoriko, Fujimura, Japanese Patent Application, #62–161831, c/o Toray Industries, Inc.Google Scholar
13. Mita, I., Kochi, M., Hasewaga, M., Iizuka, T., Soma, H., Yokota, R., and Horiuchi, R., Polyimides: Materials, Chemistry, and Characterization, p. 1, Elsevier, Amsterdam (1989).Google Scholar
14. Yokota, R., Horiuchi, R., Kochi, M., Takahashi, C., Soma, H., and Mita, I., in Polyimides: Materials, Chemistry, and Characterization, Elsevier, Amsterdam (1989), p. 13.Google Scholar
15. Brekner, M. and Feger, C., J. Polym. Sci., 25, 2479 (1987).Google Scholar
16. Feger, C., Symposium on Recent Advances In Polymides And Other High Performance Polymers, San Diego, CA, January 22–25, 1990.Google Scholar
17. Yoon, D. Y., Ree, M., Volksen, W., Hofer, D., Depero, L., and Parrish, W., The Third International Conference on Polyimides, Mid-Hudson Section of SPE, November 2–4, 1988, Ellenville, New York. Google Scholar
18. Numata, S., Oohara, S., Imaizumi, J., Polymer J., 17, #8, 981 (1985).CrossRefGoogle Scholar
19. Numata, S., Oohara, S., Fujisaki, K., Imaizumi, J., and Kinjo, N., J. Appl. Polymer Sci., 31, 101 (1986).Google Scholar
20. Numata, S., Fujisaki, K., and Kinjo, N., Polymer, 28, 2282 (1987).Google Scholar
21. Numata, S., Kinjo, K., and Makin, D., Polym. Eng. & Sci., 28, #14, 906 (1988).Google Scholar