Preparation of Polyimide Films from A-BPDA/ODA by One-Pot and Two-Step Imidization Methods

Abstract

Polyimide films were prepared from 2, 3, 3′, 4′-biphenyl tetracarboxylic dianhydride (a-BPDA) and 4, 4′-oxydianiline (ODA) by a two-step method (thermal and chemical imidization) and a one-pot method. In the case of the polyimide films prepared from polyamic acid solution by the two-step method, the molecular weight of the films decreased before achieving its final value. In the case of polyimide films prepared by the one-pot method, the molecular weight increased smoothly to its final molecular weight during cure. The inflection point in the viscosity curve was observed between 215 and 250 °C in the polyimide prepared by the two-step method, and the range of the inflection temperature was very different from the T _g of the polyimide (340 °C). So, this inflection of molecular weight was considered to be independent of the T _g of the polyimide. The films prepared from three methods had almost the same molecular weight and properties in spite of the different preparation processes. For this reason it is thought that the polyimide from a-BPDA/ODA has less crystallinity and less phase orientation.

Get full access to this article

View all access options for this article.

References

[1] Young P R and Chang A C 1985 SAMPE Symp. 30 889-889

[2] Young P R and Chang A C 1987 SAMPE Symp. 32 1051-1051

[3] Young P R , Davis J R J , Chang A C and Richardson J N 1990 J. Polym. Sci. Part A: Polym. Chem. 28 3107-3107

[4] Dine-Hart R A and Wright W W 1967 J. Appl. Polym. Sci. 11 609-609

[5] Korzhavin L N , Shibayev L A , Bronnikov S V , Antonova T A , Sazanov Yu N and Frenkel’s Ya 1980 Polym. Sci. USSR 22 2220-2220

[6] Cotts P M 1984 Polyimides: Synthesis, Characterization, and Applications ed K L Mittal (New York: Plenum) p 223-223

[7] Bell V L , Stump B L and Garger H 1976 J. Polym. Sci. Polym. Chem. Ed. 14 2275-2275

[8] Inoue H , Sasaki Y and Ogawa T 1996 J. Appl. Polym. Sci. 60 123-123

[9] Inoue H , Okamoto H and Hiraoka Y 1987 Radiat. Phys. Chem. 29 283-283

10.

[10] Hasegawa M , Sensui N , Shindo Y and Yokota R 1996 J. Photopolym. Sci. Technol. 9 367-367

11.

[11] Sasaki Y and Inoue H 1982 Japanese Patent Provisional Publication no 57131248

12.

[12] Sauers C K 1969 J. Org. Chem. 34 2275-2275

13.

[13] Sauers C K 1971 J. Org. Chem. 36 1941-1941

14.

[14] Sauers C K , Gould C L and Ioannou E S 1972 J. Am. Chem. Soc. 94 8156-8156

15.

[15] Vinogadova S V , Vygodskii Ya S , Vorob’ev V D , Churochkina N A , Chudina L I , Spirina T N and Korshak V V 1974 Vysokomol. Soy Ed. A 16 506-506

16.

[16] Koton M M , Meleshko T K , Kudryavtsev V V , Nechayev P P , Kamzolkina Ye V and Bogorad N N 1982 Vysokomol. Soy Ed. A 24 715-715

17.

[17] Zurakowska-Orszagh J , Orzeszko A and Chreptowicz T 1980 Eur. Polym. J. 16 289-289

18.

[18] Angelo R J , Golike R C , Tatum W E and Kreuz J A 1985 Polyimides: Synthesis, Characterization, and Applications, Proc. of 2nd Int. Conf. 631-631

19.

[19] Kudriavtsev V V , Zubkov V A , Meleshko T K , Yakimansky A V and Hofman I V 1989 Polyimides: Materials, Chemistry and Characterization ed C J Feger , M M Khojasteh and J E McGrath (Amsterdam: Elsevier) p 419-419

20.

[20] Orzeszko A and Kosinska-Banbula W 1991 Eur. Polym. J. 27 1107-1107

21.

[21] Kailani M H , Sung C S S and Huang S J 1992 Macromolecules 25 3751-3751

22.

[22] Grenier-Loustalot M F , Gillard M , Joubert F and Grenier P 1993 J. Polym. Sci. Part A: Polym. Chem. 31 2839-2839

23.

[23] Wallach M L 1969 J. Polym. Sci. A-2 7 1995-1995