Abstract
Several kinds of highly crystalline polyimide particles were obtained by heating polyamic acid solutions at 180°C that induced the thermal imidization of polyamic acids in N-methyl-2-pyrrolidone (NMP). The morphology of the particles was a sheaf or coral type that was similar to a polymer spherulite. The WAXD analysis revealed that the particles were highly crystalline. The size of the particles was in the range from 1 μm to 10 μm. It was concluded from the electron diffraction studies that the molecular axis of polyimide in the (PMDA/PPD) particle lay perpendicular to the sheaf surface.
Similar content being viewed by others
Log in or create a free account to read this content
Gain free access to this article, as well as selected content from this journal and more on nature.com
or
References
Y. Oishi, K. Itoya, M. Kakimoto, and Y. Imai, Polym. J., 21, 771 (1989).
S. Numata, S. Oohara, K. Fujisaka, J. Imaizumi, and N. Kinjo, J. Appl. Polym. Sci., 31, 101 (1986).
Y. Nagata and K. Nakama, “Proceedings of the thirty-sixth Japan Congress on Materials Research,” Vol. 36, The Society of Materials Science, Japan, Kyoto, 1993, p 269.
S. Yamashita, Y. Kato, S. Endo, K. Kimura, H. Tugita, and K. Mononobe, Kobunshi Ronbunshu, 44, 41 (1987).
K. Shimamura, H. Kobayashi, and T. Ikawa, Sen-i Gakkaishi, 49, 26 (1993).
D. Xu, K. Okuyama, F. Kumamaru, and M. Takayanagi, Polym. J., 16, 31 (1984).
T. Takahashi, K. Aoyama, Ma Shi Ping, M. Tuji, and K. Sakurai, Kobunshi Ronbunshu, 51, 22 (1994).
M. S. Ping, T. Sasaki, and T. Takahashi, Polym. Prepr., Jpn., 43, 1091 (1994).
S. Onoda, H. S. Hock, M. S. Ping, and T. Takahashi, Polym. Prepr., Jpn., 43, 1090 (1994).
Y. Nagata, Y. Ohnishi, and T. Kajiyama, Kobunshi Ronbunshu, 53, 63 (1996).
A. S. Vaughan and D. C. Bassett, Polymer, 29, 1397 (1988).
Y. Sakai, M. Imai, and K. Kaji, Polym. Prepr., Jpn., 42, 4336 (1993).
A. L. Endrey, U. S. Patent, 3179631 and 3179633 (1965).
Y. G. Baklagina, I. S. Milevskaya, N. V. Yefanova, A. V. Sidorovich, and V. A. Zubkov, Vysokomol. Soyedin., Ser. A, 18, 1235 (1976).
M. Kochi, H. Shimada, and H. Kambe, J. Polym. Sci., Polym. Phys. Ed., 22, 1979 (1984).
S. D. Bruck, J. Polym. Sci., C, 17, 169 (1967).
A. Burger, E. Fitzer, M. Heym, and B. Terwiesch, Carbon, 13, 149 (1975).
Y. Hishiyama, M. Nakamura, Y. Nagata, and M. Inagaki, Carbon, 32, 645 (1994).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nagata, Y., Ohnishi, Y. & Kajiyama, T. Highly Crystalline Polyimide Particles. Polym J 28, 980–985 (1996). https://doi.org/10.1295/polymj.28.980
Issue date:
DOI: https://doi.org/10.1295/polymj.28.980
