Synthesis and characterization of a new type of levan-graft-polystyrene copolymer
Само за регистроване кориснике
2016
Аутори
Kekez, BrankaGojgić-Cvijović, Gordana D.
Jakovljević, Dragica M.
Pavlović, Vladimir D.
Beškoski, Vladimir
Popović, Aleksandar R.
Vrvić, Miroslav M.
Nikolić, Vladimir
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Novel macromolecular graft copolymers were synthesized by reaction of the hydroxyl groups of the microbial polysaccharide levan, produced using Bacillus licheniformis, with polystyrene (Lev-g-PS). Synthesis was performed by the free radical reaction using potassium persulfate (PPS) as initiator. The prepared copolymer was characterized by FTIR, SEM, TG/DTA, XRD and C-13 NMR. The influence of the different conditions (reaction temperature, air or nitrogen atmosphere, reaction time, type of amines and ascorbic acid (AA) concentration) on the grafting reaction was investigated. Results showed that maximum percentage of grafting (58.1%) was achieved at a reaction temperature 70 degrees C, in a nitrogen atmosphere and using dimethylethanolamine (DMEA) as the amine activator. On the basis of the obtained results, the likely reaction mechanism was proposed. Synthesized copolymers have better thermal stability in comparison with their initial components. Copolymers such as Lev-g-PS could poten...tially have many applications, such as compatibilizers and material for membranes. (C) 2016 Elsevier Ltd. All rights reserved.
Кључне речи:
Levan / Microbial polysaccharide / Styrene / Graft copolymerИзвор:
Carbohydrate Polymers, 2016, 154, 20-29Издавач:
- Elsevier Sci Ltd, Oxford
Финансирање / пројекти:
- Симултана биоремедијација и соилификација деградираних простора, за очување природних ресурса биолошки активних супстанци и развој и производњу биоматеријала и дијететских производа (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43004)
- Проучавање физичкохемијских и биохемијских процеса у животној средини који утичу на загађење и истраживање могућности за минимизирање последица (RS-MESTD-Basic Research (BR or ON)-172001)
Напомена:
- Supplementary material: http://cherry.chem.bg.ac.rs/handle/123456789/3624
DOI: 10.1016/j.carbpol.2016.08.001
ISSN: 0144-8617
PubMed: 27577892
WoS: 000382318800004
Scopus: 2-s2.0-84981520571
Институција/група
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Kekez, Branka AU - Gojgić-Cvijović, Gordana D. AU - Jakovljević, Dragica M. AU - Pavlović, Vladimir D. AU - Beškoski, Vladimir AU - Popović, Aleksandar R. AU - Vrvić, Miroslav M. AU - Nikolić, Vladimir PY - 2016 UR - https://cherry.chem.bg.ac.rs/handle/123456789/2300 AB - Novel macromolecular graft copolymers were synthesized by reaction of the hydroxyl groups of the microbial polysaccharide levan, produced using Bacillus licheniformis, with polystyrene (Lev-g-PS). Synthesis was performed by the free radical reaction using potassium persulfate (PPS) as initiator. The prepared copolymer was characterized by FTIR, SEM, TG/DTA, XRD and C-13 NMR. The influence of the different conditions (reaction temperature, air or nitrogen atmosphere, reaction time, type of amines and ascorbic acid (AA) concentration) on the grafting reaction was investigated. Results showed that maximum percentage of grafting (58.1%) was achieved at a reaction temperature 70 degrees C, in a nitrogen atmosphere and using dimethylethanolamine (DMEA) as the amine activator. On the basis of the obtained results, the likely reaction mechanism was proposed. Synthesized copolymers have better thermal stability in comparison with their initial components. Copolymers such as Lev-g-PS could potentially have many applications, such as compatibilizers and material for membranes. (C) 2016 Elsevier Ltd. All rights reserved. PB - Elsevier Sci Ltd, Oxford T2 - Carbohydrate Polymers T1 - Synthesis and characterization of a new type of levan-graft-polystyrene copolymer VL - 154 SP - 20 EP - 29 DO - 10.1016/j.carbpol.2016.08.001 ER -
@article{ author = "Kekez, Branka and Gojgić-Cvijović, Gordana D. and Jakovljević, Dragica M. and Pavlović, Vladimir D. and Beškoski, Vladimir and Popović, Aleksandar R. and Vrvić, Miroslav M. and Nikolić, Vladimir", year = "2016", abstract = "Novel macromolecular graft copolymers were synthesized by reaction of the hydroxyl groups of the microbial polysaccharide levan, produced using Bacillus licheniformis, with polystyrene (Lev-g-PS). Synthesis was performed by the free radical reaction using potassium persulfate (PPS) as initiator. The prepared copolymer was characterized by FTIR, SEM, TG/DTA, XRD and C-13 NMR. The influence of the different conditions (reaction temperature, air or nitrogen atmosphere, reaction time, type of amines and ascorbic acid (AA) concentration) on the grafting reaction was investigated. Results showed that maximum percentage of grafting (58.1%) was achieved at a reaction temperature 70 degrees C, in a nitrogen atmosphere and using dimethylethanolamine (DMEA) as the amine activator. On the basis of the obtained results, the likely reaction mechanism was proposed. Synthesized copolymers have better thermal stability in comparison with their initial components. Copolymers such as Lev-g-PS could potentially have many applications, such as compatibilizers and material for membranes. (C) 2016 Elsevier Ltd. All rights reserved.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Carbohydrate Polymers", title = "Synthesis and characterization of a new type of levan-graft-polystyrene copolymer", volume = "154", pages = "20-29", doi = "10.1016/j.carbpol.2016.08.001" }
Kekez, B., Gojgić-Cvijović, G. D., Jakovljević, D. M., Pavlović, V. D., Beškoski, V., Popović, A. R., Vrvić, M. M.,& Nikolić, V.. (2016). Synthesis and characterization of a new type of levan-graft-polystyrene copolymer. in Carbohydrate Polymers Elsevier Sci Ltd, Oxford., 154, 20-29. https://doi.org/10.1016/j.carbpol.2016.08.001
Kekez B, Gojgić-Cvijović GD, Jakovljević DM, Pavlović VD, Beškoski V, Popović AR, Vrvić MM, Nikolić V. Synthesis and characterization of a new type of levan-graft-polystyrene copolymer. in Carbohydrate Polymers. 2016;154:20-29. doi:10.1016/j.carbpol.2016.08.001 .
Kekez, Branka, Gojgić-Cvijović, Gordana D., Jakovljević, Dragica M., Pavlović, Vladimir D., Beškoski, Vladimir, Popović, Aleksandar R., Vrvić, Miroslav M., Nikolić, Vladimir, "Synthesis and characterization of a new type of levan-graft-polystyrene copolymer" in Carbohydrate Polymers, 154 (2016):20-29, https://doi.org/10.1016/j.carbpol.2016.08.001 . .