Synthesis and properties of new optically active and organosoluble poly(ester-imide)s containing L-valine moieties in the main chain by direct polycondensation reaction
Faghihi, K; Shabanian, M; Hajibeygi, M
| HERO ID | 3577575 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | Synthesis and properties of new optically active and organosoluble poly(ester-imide)s containing L-valine moieties in the main chain by direct polycondensation reaction |
| Authors | Faghihi, K; Shabanian, M; Hajibeygi, M |
| Journal | Turkish Journal of Chemistry |
| Volume | 35 |
| Issue | 2 |
| Page Numbers | 279-289 |
| Abstract | New optically active poly(ester-imide)s (PEIs) containing bicyclo[2,2,2] oct-7-ene-2,3,5,6-tetracarboxylic diimide in the main chain were prepared by the reaction of N,N'-(bicyclo[2,2,2] oct-7-ene-2,3,5,6-tetra carboxylic)-bis-L-valine 4 as a diacid monomer with various aromatic diols 5a-g in a system of tosyl chloride (TsCl), pyridine (Py), and N,N-dimethylformamide (DMF). The reactions with TsCl were significantly promoted by controlling alcoholysis with diols, in the presence of catalytic amounts of DMF, to give a series of optically active poly(ester-imide) s. The resulting new polymers were obtained in good yields and inherent viscosities, ranging between 0.36 and 0.62 dL g(-1), and were characterized with FT-IR and (1)H-NMR spectroscopy, including specific rotation. All of these polymers were highly organosoluble at room temperature in solvents like N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), and sulfuric acid. The thermal stability of the resulting PEIs was evaluated with thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques under a nitrogen atmosphere, which indicated that the residual weight percent of the polymers at 600 degrees C was 43.69%-60.5% and showed that they are moderately thermally stable. |
| Doi | 10.3906/kim-1004-540 |
| Wosid | WOS:000288096600011 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Poly(ester-imide)s; direct polycondensation; optically active polymers; thermal properties |