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Synthesis and characterization of new poly(ester-imide)s based on 1,3-bis[4,4′-bis(trimellitimido) phenyl]-2-propenone and aromatic diols
| Content Provider | Semantic Scholar |
|---|---|
| Author | Faghihi, Khalil Gholizadeh, Mohammad Hossein |
| Copyright Year | 2010 |
| Abstract | Six new poly(ester-imide)s 9a–f were prepared by the rapid polycondensation reaction of 1,3-bis[4,4′-bis(trimellitimidoyl chloride) phenyl]-2-propenone 7 with several aromatic diols 8a–f using a domestic microwave oven in the presence of a small amount of a polar organic medium, such as o-cresol. The polycondensation reaction proceeded more rapidly than solution polycondensation and was almost complete within 13 min, giving a series of poly(amide-imide)s in high yield with inherent viscosities ranging from 0.42 to 0.62 dL/g. All the above polymers were fully characterized by elemental analysis, viscosity measurements, solubility test, FTIR spectroscopy, differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA and DTG). 1,3-Bis [4,4′-bis(trimellitimidoyl chloride) phenyl]-2-propenone 7 was synthesized by a four-step reaction. Initially, 4-nitro benzaldehyde 1 was reacted with 4-nitro acetophenone 2 in acetic anhydride to form 1,3-bis(4-nitro phenyl)-2-propenone 3. The dinitro 3 was then reduced to the diamine 4 using sodium sulfide. A condensation reaction of one equimolar of diamine 4 with two equimolars of trimellitic anhydride 5 in a mixture of acetic acid and pyridine (3:2) led to the formation of 1,3-bis[4,4′-bis(trimellitimido) phenyl]-2-propenone 6. Finally the diacid 6 was converted to 1,3-bis[4,4′-bis(trimellitimidoyl chloride) phenyl]-2-propenone 7 by a reaction with thionyl chloride. |
| Starting Page | 2 |
| Ending Page | 7 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s13233-008-0186-1 |
| Alternate Webpage(s) | https://www.cheric.org/PDF/PST/PT21/PT21-1-0124.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s13233-008-0186-1 |
| Volume Number | 18 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
