Heat Resistant Poly(amide-imide)s Derived from N,N '-(4,4 '-Pyromellitoyl)-bis-L-phenyl Acetic Acid and Aromatic Diamines: Synthesis and Properties
Faghihi, K; Hajibeygi, M
| HERO ID | 3577520 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Heat Resistant Poly(amide-imide)s Derived from N,N '-(4,4 '-Pyromellitoyl)-bis-L-phenyl Acetic Acid and Aromatic Diamines: Synthesis and Properties |
| Authors | Faghihi, K; Hajibeygi, M |
| Journal | High Temperature Materials and Processes |
| Volume | 32 |
| Issue | 1 |
| Page Numbers | 51-57 |
| Abstract | Six new heat resistant and optically active poly(amide-imide)s 5a-f were prepared by the direct polycondensation reaction of N,N'-(4,4'-pyromellitoyl)-bis-L-phenyl acetic acid 3 with various different diamines 4a-f in a medium consisting of triphenyl phosphite, N-methyl-2-pyrrolidone, pyridine and calcium chloride. These polymers were obtained in high yields and had inherent viscosities between 0.35-0.50 dL/g. The resulting polymers were characterized by viscosity measurements, thermal gravimetric analysis (TGA and DTG), differential scanning calorimeter (DSC), solubility test, specific rotation, FT-IR and H-1 NMR spectroscopy. N,N'-(4,4'-pyromellitoyl)-bis-L-phenyl acetic acid 3 was prepared by an one-stop reaction of pyromellitic anhydride 1 with L-phenyl acetic acid 3 in acetic acid solution in quantitative yield. |
| Doi | 10.1515/htmp-2012-0059 |
| Wosid | WOS:000315330500008 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | heat resistant; optically active; poly(amide-imide); aromatic diamines |