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Mohamed NA, Sammour MH, Elshafai AM. Novel self-dyed wholly aromatic polyamide-hydrazides covalently bonded with azo groups in their main chains: 1. Structure-property relationships. Molecules 2012. [PMID: 23183888 PMCID: PMC6268658 DOI: 10.3390/molecules171213969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Twelve novel intrinsically colored wholly aromatic azopolyamide-hydrazides containing various proportions of para- and meta-phenylene units were successfully synthesized by a low temperature (−10 °C) solution polycondensation reaction of either 4-amino-3-hydroxybenzhydrazide (4A3HBH) or 3-amino-4-hydroxybenzhydrazide (3A4HBH) with an equimolar amount of either 4,4′-azodibenzoyl chloride (4,4′ADBC), 3,3′-azodibenzoyl chloride (3,3′ADBC), or mixtures of various molar ratios of 4,4′ADBC and 3,3′ADBC in anhydrous N,N-dimethyl acetamide (DMAc) containing 3% (wt/v) LiCl as a solvent. The structures of the polymers were proven by elemental analysis, FTIR, 1H- and 13C-NMR spectroscopy. The polymers’ properties were strongly affected by their various structures. The intrinsic viscosities of the polymers were ranged from 0.7 to 4.75 dL g−1 and increased with the para-phenylene units content. The polymers are partially soluble in DMAc, dimethyl formamide (DMF) and N-methyl-2-pyrrolidone (NMP). Their solubility increases with the introduction of meta-phenylene moieties into the polymer chains. The polymers exhibit a great affinity for water sorption. Their hydrophilicity increases as a function of the content of meta-phenylene rings incorporated into the polymer. Mechanical properties of the polymer films are improved markedly by substitution of para-phenylene units for meta-phenylene units. The completely para-oriented type polymer has the best thermal and thermo-oxidative stability relative to those of the other polymers.
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Affiliation(s)
- Nadia A. Mohamed
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
- Author to whom correspondence should be addressed; E-Mail:
| | - Mohammad H. Sammour
- Excellence Center of Science and Technology, Elsalam-2, Cairo 3066, Egypt; E-Mails: (M.H.S.); (A.M.E.)
| | - Ali M. Elshafai
- Excellence Center of Science and Technology, Elsalam-2, Cairo 3066, Egypt; E-Mails: (M.H.S.); (A.M.E.)
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Fahmy MM, Al-ghamdi RF, Mohamed NA. Synthesis, characterization, and thermal stability of novel wholly para-oriented aromatic poly(ether-amide-hydrazide)s bearing pendant groups and their corresponding poly(ether-amide-1,3,4-oxadiazole)s. Polym Bull (Berl) 2011; 66:609-25. [DOI: 10.1007/s00289-010-0296-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cavalleri P, Chavan NN, Ciferri A, Dell'Erba C, Lozano AE, Novi M, Preston J. Synthesis and Polycondensation of Novel Nitroaromatic Monomers. 2. Wholly Ordered Polymers of N,N‘-Bis(4-amino- 3-nitrophenyl)terephthalamide and N,N‘-Bis[4-((4-amino-3-nitrophenyl)- carbamoyl)phenyl]terephthalamide. Macromolecules 1997. [DOI: 10.1021/ma960861l] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Cavalleri
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - N. N. Chavan
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - A. Ciferri
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - C. Dell'Erba
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - A. E. Lozano
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - M. Novi
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
| | - J. Preston
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy, Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Madrid, Spain, Camille Dreyfus Polymer Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709
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