Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile
Polyacrylontrile synthesis, via atom transfer radical polymerization, is studied in various initiator concentrations, transitional metal catalyst and different concentrations of CuBr2. The variations of monomer conversion and the lin-earity of semi-logarithmic kinetic profile which is the evidence o...
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| Format: | Article |
| Language: | fas |
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Iran Polymer and Petrochemical Institute
2013-01-01
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| Series: | علوم و تکنولوژی پلیمر |
| Subjects: | |
| Online Access: | http://jips.ippi.ac.ir/article_647_f531b7ef466343a1439046c17d574010.pdf |
| _version_ | 1818885357798686720 |
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| author | H. Roghani-Mamaqani V. Haddadi-Asl M. Najafi M. Salami-Kalajahi |
| author_facet | H. Roghani-Mamaqani V. Haddadi-Asl M. Najafi M. Salami-Kalajahi |
| author_sort | H. Roghani-Mamaqani |
| collection | DOAJ |
| description | Polyacrylontrile synthesis, via atom transfer radical polymerization, is studied in various initiator concentrations, transitional metal catalyst and different concentrations of CuBr2. The variations of monomer conversion and the lin-earity of semi-logarithmic kinetic profile which is the evidence of living polymerization and constant radical concentration in the reaction medium, were revealed by gas chromatography technique (GC). Gel permeation chromatography (GPC) studies revealed that, the number average molecular weight increases linearly against monomer conversion, an indicative of living nature of the polymerization process. Additionally, the conversion, apparent rate constant and number average molecular weight increased with increased initiator concentration as well as the transitional metal complex concentration. However, addition of CuBr2 lowered conversion, kapp, and the number average molecular weight of polyacrylonitrile. Molecular weight distribution of synthesized polymers broadened with increased initiator concentration and also transitional metal complex concentration. However, addition of CuBr2 has resulted in narrower molecular weight distribution polyacrylonitrile. Moreover, all the samples experienced a drop in PDI value from nearly 2 to almost 1.1 as the reaction progressed. |
| first_indexed | 2024-12-19T16:04:10Z |
| format | Article |
| id | doaj.art-471a85cbf7334b1cb5d338e87105f240 |
| institution | Directory Open Access Journal |
| issn | 1016-3255 2008-0883 |
| language | fas |
| last_indexed | 2024-12-19T16:04:10Z |
| publishDate | 2013-01-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | علوم و تکنولوژی پلیمر |
| spelling | doaj.art-471a85cbf7334b1cb5d338e87105f2402022-12-21T20:14:52ZfasIran Polymer and Petrochemical Instituteعلوم و تکنولوژی پلیمر1016-32552008-08832013-01-01231536410.22063/jipst.2013.647647Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of AcrylonitrileH. Roghani-MamaqaniV. Haddadi-AslM. NajafiM. Salami-KalajahiPolyacrylontrile synthesis, via atom transfer radical polymerization, is studied in various initiator concentrations, transitional metal catalyst and different concentrations of CuBr2. The variations of monomer conversion and the lin-earity of semi-logarithmic kinetic profile which is the evidence of living polymerization and constant radical concentration in the reaction medium, were revealed by gas chromatography technique (GC). Gel permeation chromatography (GPC) studies revealed that, the number average molecular weight increases linearly against monomer conversion, an indicative of living nature of the polymerization process. Additionally, the conversion, apparent rate constant and number average molecular weight increased with increased initiator concentration as well as the transitional metal complex concentration. However, addition of CuBr2 lowered conversion, kapp, and the number average molecular weight of polyacrylonitrile. Molecular weight distribution of synthesized polymers broadened with increased initiator concentration and also transitional metal complex concentration. However, addition of CuBr2 has resulted in narrower molecular weight distribution polyacrylonitrile. Moreover, all the samples experienced a drop in PDI value from nearly 2 to almost 1.1 as the reaction progressed.http://jips.ippi.ac.ir/article_647_f531b7ef466343a1439046c17d574010.pdfatrppolyacrylonitrilereactant concentrationkineticcatalyst |
| spellingShingle | H. Roghani-Mamaqani V. Haddadi-Asl M. Najafi M. Salami-Kalajahi Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile علوم و تکنولوژی پلیمر atrp polyacrylonitrile reactant concentration kinetic catalyst |
| title | Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile |
| title_full | Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile |
| title_fullStr | Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile |
| title_full_unstemmed | Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile |
| title_short | Effect of Reactant Concentration Variations on the Kinetics of Atom Transfer Radical Polymerization of Acrylonitrile |
| title_sort | effect of reactant concentration variations on the kinetics of atom transfer radical polymerization of acrylonitrile |
| topic | atrp polyacrylonitrile reactant concentration kinetic catalyst |
| url | http://jips.ippi.ac.ir/article_647_f531b7ef466343a1439046c17d574010.pdf |
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