Synthesis, characterization and properties of novel polyamides derived from 4 4' bis(4-carboxy methylene) biphenyl and various diamines
| Autor: | Arati V. Diwate, Aslam B. Tamboli, N. N. Maldar, Shivaji. D. Ghodke, V. P. Ubale |
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| Rok vydání: | 2020 |
| Předmět: |
Formamide
Condensation polymer Polymers and Plastics General Chemical Engineering 02 engineering and technology 010402 general chemistry 01 natural sciences thermal stability chemistry.chemical_compound Full Length Article Polymer chemistry Materials Chemistry glass transition temperature Methylene Friedel–Crafts reaction Chemistry 4 4’ bis(4- Carboxy methylene) Biphenyl General Chemistry polyamides by Yamazaki phosphoryalation method 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:TP1080-1185 Acetic anhydride Monomer lcsh:Polymers and polymer manufacture 0210 nano-technology Glass transition Acetamide Research Article |
| Zdroj: | Designed Monomers and Polymers article-version (VoR) Version of Record Designed Monomers and Polymers, Vol 23, Iss 1, Pp 177-187 (2020) |
| ISSN: | 1385-772X |
| Popis: | Novel aromatic aliphatic diacid monomer, 4 4ʹ bis(4-carboxy methylene) biphenyl was synthesized via friedel craft acylation with acetic anhydride followed by willgerodot reaction and used in the preparation of polyamides by direct polycondensation using the Yamazaki phosphorylation reaction with commercial aromatic diamines. These polyamides were obtained in good yield with moderate-to-high-molecular-weight build up as evidenced by inherent viscosities in the range of 0.52–0.96 dlg−1. The XRD studies showed that all the polyamides were amorphous in nature and these polymers dissolved in polar aprotic solvents such as N-methyl-2-pyrrolidone(NMP),N,N-dimethylsulfoxide(DMSO), N,N-dimethyl formamide (DMF) and N,N-dimethyl acetamide. The resulting polyamides were characterized by inherent viscocity measurements, FT-IR, 1H NMR and 13C NMR spectroscopy, solubility, thermogravimetry, X-ray diffraction studies. These polyamides had glass transition temperatures between 210°C and 261°C, and their temperatures at a 10% weight loss were 620 to 710°C and 497 to 597°C in nitrogen and air atmospheres, respectively, which indicates thermally stable polymers. |
| Databáze: | OpenAIRE |
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