Synthesis and characterization of a new type of levan-graft-polystyrene copolymer
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2016
Authors
Kekez, BrankaGojgić-Cvijović, Gordana
Jakovljević, Dragica
Pavlović, Vladimir
Beskoski, Vladimir
Popović, Aleksandar
Vrvić, Miroslav M.
Nikolić, Vladimir
Article (Published version)
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Show full item recordAbstract
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.
Keywords:
Levan / Microbial polysaccharide / Styrene / Graft copolymerSource:
Carbohydrate Polymers, 2016, 154, 20-29Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- Simultaneous Bioremediation and Soilification of Degraded Areas to Preserve Natural Resources of Biologically Active Substances, and Development and Production of Biomaterials and Dietetic Products (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43004)
- The study of physicochemical and biochemical processes in living environment that have impacts on pollution and the investigation of possibilities for minimizing the consequences (RS-MESTD-Basic Research (BR or ON)-172001)
DOI: 10.1016/j.carbpol.2016.08.001
ISSN: 0144-8617
PubMed: 27577892
WoS: 000382318800004
Scopus: 2-s2.0-84981520571
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Institution/Community
Poljoprivredni fakultetTY - JOUR AU - Kekez, Branka AU - Gojgić-Cvijović, Gordana AU - Jakovljević, Dragica AU - Pavlović, Vladimir AU - Beskoski, Vladimir AU - Popović, Aleksandar AU - Vrvić, Miroslav M. AU - Nikolić, Vladimir PY - 2016 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/4034 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. PB - Elsevier Sci Ltd, Oxford T2 - Carbohydrate Polymers T1 - Synthesis and characterization of a new type of levan-graft-polystyrene copolymer EP - 29 SP - 20 VL - 154 DO - 10.1016/j.carbpol.2016.08.001 ER -
@article{ author = "Kekez, Branka and Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Pavlović, Vladimir and Beskoski, Vladimir and Popović, Aleksandar 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.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Carbohydrate Polymers", title = "Synthesis and characterization of a new type of levan-graft-polystyrene copolymer", pages = "29-20", volume = "154", doi = "10.1016/j.carbpol.2016.08.001" }
Kekez, B., Gojgić-Cvijović, G., Jakovljević, D., Pavlović, V., Beskoski, V., Popović, A., 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 G, Jakovljević D, Pavlović V, Beskoski V, Popović A, 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, Jakovljević, Dragica, Pavlović, Vladimir, Beskoski, Vladimir, Popović, Aleksandar, 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 . .