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Wen XJ, Qi XW, Yi QF, Yang J, Huang ML. Flame retardancy and mechanical properties of poly(decamethylene terephthalamide) filled with metal phosphinates. POLYMER SCIENCE SERIES B 2016. [DOI: 10.1134/s156009041606018x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhao J, Xu H, Fang J, Yin J. Synthesis and characterization of novel aromatic polyamides via Yamazaki-Higashi phosphorylation method. J Appl Polym Sci 2012. [DOI: 10.1002/app.36979] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sadavarte NV, Avadhani C, Wadgaonkar PP. Synthesis and characterization of new organosoluble aromatic polyamides and polyazomethines containing pendent pentadecyl chains. HIGH PERFORM POLYM 2011. [DOI: 10.1177/0954008311417316] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
New aromatic polyamides and polyazomethines containing pendent pentadecyl chains were synthesized by polycondensation of pentadecylbenzene-1,3-diamine with (i) four commercially available aromatic diacids, viz., biphenyl-4,4′dicarboxylic acid, 4,4′-oxybisbenzoic acid, terephthalic acid and isophthalic acid, and (ii) dialdehydes, viz., terephthaldehyde, isophthaldehyde and a 50 : 50 mol% mixture of terephthaldehyde, and isophthaldehyde, respectively. Inherent viscosities of polyamides and polyazomethines were in the range 0.35–0.56 dL g−1 and 0.33–0.38 dL g−1, respectively, indicating the formation of medium molecular weight polymers. The presence of pendent pentadecyl chains in polyamides and polyazomethines led to an improvement in their solubility in organic solvents. Polyamides could be cast into flexible, transparent and tough films from their solution in N, N-dimethylacetamide while polyazomethines could be solution cast into transparent, flexible and stretchable films from their CHCl3 solution. 1H-NMR studies based on amide proton signals and azomethine proton signals indicated the presence of constitutional isomerism in the polyamides and polyazomethines. Wide-angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were amorphous in nature. X-ray diffractograms also displayed sharp reflections in the small angle region (2 θ ≈ 3°) indicating the formation of layered structure arising from packing of flexible pentadecyl chains. The glass transition ( Tg) temperatures of polyamides were in the range 169–215 °C while Tg values for polyazomethines were in the range 16–55 °C. The temperature for the 10% weight loss of polyamides and polyazomethines were in the range 430–460 °C and 425–440 °C, respectively, in a nitrogen atmosphere, which indicated their good thermal stability. Polyazomethines were also characterized by UV-Vis and photoluminescence spectroscopy and optical band gap ( Eg) values, calculated according to the maximum of the UV absorption, were found to be in the range 2.82–3.10 eV.
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Affiliation(s)
- Nilakshi V. Sadavarte
- Polymer Science and Engineering Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, India
| | - C.V. Avadhani
- Polymer Science and Engineering Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, India
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Ghaemy M, Alizadeh R, Hashemi Nasr F. Synthesis, characterization, thermal and optical properties of soluble polyimides derived from an unsymmetrical diamine. J Appl Polym Sci 2010. [DOI: 10.1002/app.32668] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gómez-Valdemoro A, San-José N, García FC, De La Peña JL, Serna F, García JM. Novel aromatic polyamides with main chain and pendant 1,2,4-triazole moieties and their application to the extraction/elimination of mercury cations from aqueous media. Polym Chem 2010. [DOI: 10.1039/c0py00103a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ghaemy M, Nasab SMA, Alizadeh R. Synthesis and characterization of new soluble polyamides from an unsymmetrical diamine bearing a bulky triaryl pyridine pendent group. J Appl Polym Sci 2010. [DOI: 10.1002/app.31992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Pal RR, Patil PS, Salunkhe MM, Maldar NN, Wadgaonkar PP. Synthesis, characterization and constitutional isomerism study of new aromatic polyamides containing pendant groups based on asymmetrically substituted meta-phenylene diamines. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2008.11.034] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu Y, Wang Q. The investigation on the flame retardancy mechanism of nitrogen flame retardant melamine cyanurate in polyamide 6. JOURNAL OF POLYMER RESEARCH 2009. [DOI: 10.1007/s10965-008-9263-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Gómez-Valdemoro A, Calderón V, San-José N, García FC, De La Peña JL, García JM. The extraction of environmentally polluting cations from aqueous media with novel polyamides containing cation- and anion-selective host units. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.23174] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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San-José N, Gómez-Valdemoro A, García FC, Calderón V, García JM. Novel aliphatic–aromatic poly(amide urea)s: Synthesis, characterization and application to the elimination of environmentally toxic heavy metal ions. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2008.06.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lemoff A, Yan B. Dual Detection Approach to a More Accurate Measure of Relative Purity in High-Throughput Characterization of Compound Collections. ACTA ACUST UNITED AC 2008; 10:746-51. [PMID: 18698828 DOI: 10.1021/cc800100g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew Lemoff
- St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, and Shandong University, Jinan, China 250100
| | - Bing Yan
- St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, and Shandong University, Jinan, China 250100
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