Synthesis of organ-soluble copolyimides by one-step polymerization and fabrication of high performance fibers
Dong, Jie; Yin, C; Luo, W; Zhang, Q
| HERO ID | 3577441 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Synthesis of organ-soluble copolyimides by one-step polymerization and fabrication of high performance fibers |
| Authors | Dong, Jie; Yin, C; Luo, W; Zhang, Q |
| Journal | Journal of Materials Science |
| Volume | 48 |
| Issue | 21 |
| Page Numbers | 7594-7602 |
| Abstract | A series of organ-soluble copolyimides (co-PIs) were synthesized from 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), 2,2'-bis(trifluoromethyl)-4, 4'-diaminobiphenyl (TFMB), and 2-(4-aminophenyl)-5-aminobenzimidazole (BIA) via a one-step polymerization in N-methyl-2-pyrrolidone (NMP). The polyimide solutions were used to fabricate as-spun polyimide fiber by a wet-spinning process. SEM images of the round cross-section of the fibers indicated that a homogeneous and dense fibrous structure was produced in the coagulation bath of H2O/NMP = 90/10 (v/v) and many microfibrils appeared on the surface. The drawn fibers exhibit excellent mechanical properties, and the strength and modulus of BTDA/TFMB/BIA co-PI fibers (TFMB/BIA = 50/50) reached 2.25 and 102 GPa with a draw ratio of 3.0. The 5 % weight loss temperature of the co-PI fibers in thermogravimetric analysis spectra achieved 548-563 A degrees C in an air atmosphere. The glass transition temperatures were found to be between 340 and 366 A degrees C according to the DMA results. Annealed BTDA/TFMB/BIA co-PI fibers displayed distinct wide-angle X-ray patterns, and crystallinity and crystal orientation with various draw ratios were observed. |
| Doi | 10.1007/s10853-013-7576-2 |
| Wosid | WOS:000323249500028 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN: |
| Is Public | Yes |