Sage Journals: Discover world-class research

Abstract

A series of main chain degradable poly(amide-imide)s 7 were prepared from acetal-containing diimide-dicarboxylic acid 5 with various aromatic diamine monomers 6 by the direct polycondensation in NMP using triphenyl phosphite/pyridine as condensing agents. The novel diimide-dicarboxylic acid 5 bearing 2-trifluoromethylphenyl substituted acetal unit was synthesized by the condensation reaction of amine compound 4 with trimellitic anhydride. All the polymers were obtained in quantitative yields with inherent viscosities of 0.41-0.53 dl g^-1. The structure of polymers was confirmed by IR, ¹H NMR and ¹³C NMR spectroscopy The poly(amide-imide)s obtained were soluble in polar solvents such as NMP and DMAc. Most were cast into transparent and flexible films, which had tensile strengths ranging from 40 to 80 MPa, elongation-to-breakage from 2.8 to 6.6%, and initial moduli from 1.2 to 1.6 GPa. The glass transition temperatures of these polymers were in the range 208-232°C and showed 5% weight loss temperature ranging from 350 to 385°C under air or nitrogen atmosphere. Furthermore, the acid-catalyzed degradation behavior of poly(amide-imide)s 7 was also investigated.

Keywords

Poly(amide-imide)acetal unit degradable

Get full access to this article

View all access options for this article.

References

[1] Crivello J V , Lee J L and Conlon D A 1987 J Polym. Sci., Polym. Chem. 25 3293-3293

[2] Moore J A and Dasheff A 1988 ACS Polymeric Mater Sci. Eng. 59 999-999

[3] Sroog C E 1976 J. Polym. Sci. Macromol. Rev 11 161-161

[4] Cassidy P E 1980 Thermally Stable Polymers (New York: Dekker) ch 5

[5] Jeong H J , Kakimoto M and Imai Y 1992 J. Polym. Sci., Polym. Chem. 29 1691-1691

[6] Oishi Y Ishida M , Kakimoto M and Imai Y 1992 J Polym. Sci., Polym. Chem. 30 1027-1027

[7] Kim W G and Hay A S 1993 Macromolecules 26 5275-5275

[8] Kurita K , Itoh H and Iwakura Y 1978 J. Polym. Sci. A: Polym. Chem. 16 799-799

[9] Fujimoto M , Oishi T , Momio M and Murata S 1976 Nippon Kagaku Kaishi 9 1465-1465

10.

[10] Imai Y , Maldar N N and Kakimoto M 1985 J. Polym. Sci. A. Polym. Chem. 23 2077-2077

11.

[11] Maiti S and Ray A 1981 Makromol. Chem. Rapid Commun. 2 649-649

12.

[12] Kakimoto M , Akiyama R , Negi Y S and Imai Y 1988 J. Polym. Sci. A. Polym. Chem. 26 99-99

13.

[13] Yamazaki N , Matsumoto M and Higashi F 1975 J Polym. Sci., Polym. Chem. Ed. 13 1373-1373

14.

[14] Yang C P , Lin J H and Hsiao S H 1991 J. Polym. Sci. A. Polym. Chem. 29 1175-1175

15.

[15] Hsiao S H , Yang C P and Wu F Y 1994 Makromol. Chem. Phys. 195 2531-2531

16.

[16] Akimoto S , Kato D , Jikei M and Kakimoto M 1999 J. Photopolym. Sci. Technol. 12 245-245

17.

[17] Akimoto S , Kato D , Jikei M and Kakimoto M 2000 High Perform. Polym. 12 185-185

18.

[18] Li L , Jikei M and Kakimoto M High Perform. Polym. submitted

19.

[19] Yang C P and Lin J H 1995 Polymer 36 2835-2835

20.

[20] Chern Y T , Huang C M and Huang S C 1998 Polymer 39 2929-2929

Synthesis and Characterization of Main Chain Degradable Poly(amide-imide)s with Acetal Unit

Abstract

Keywords

Get full access to this article

References