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Biodegradacija kalemljenih kopolimera skroba i polistirena i skroba i poli(metakrilne kiseline) u rečnoj vodi

dc.creatorNikolić, Vladimir
dc.creatorVeličković, Sava
dc.creatorAntonović, Dušan G.
dc.creatorPopović, Aleksandar R.
dc.date.accessioned2018-11-22T00:24:21Z
dc.date.available2018-11-22T00:24:21Z
dc.date.issued2013
dc.identifier.issn0352-5139
dc.identifier.urihttp://cherry.chem.bg.ac.rs/handle/123456789/1425
dc.description.abstractIn this paper, a biodegradation study of grafted copolymers of cornstarch and polystyrene (PS) and cornstarch and poly(methacrylic acid) in model river water is described. These copolymers were obtained in the presence of different amine activators. The synthesized copolymers and products of degradation were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). Biodegradation was monitored by mass decrease and the number of microorganisms by the Koch method. Biodegradation of both copolymers advanced with time, the starch-graft-poly(methacrylic acid) copolymers had completely degraded after 21 day, and the starch graft polystyrene had partially degraded (45.8-93.1 % mass loss) after 27 days. The differences in the degree of biodegradation are the consequences of the different structures of the samples, and there was a significant negative correlation between the share of polystyrene in the copolymer and the degree of biodegradation. The grafting degree of PS necessary to prevent biodegradation was 54 %. Based on experimental evidence, the mechanisms of both biodegradation processes are proposed, and influence of degree of starch and synthetic component of copolymers on the degradation of the samples were established.en
dc.description.abstractU ovom radu proučavana je biodegradacija kalemljenih kopolimera kukuruznog skroba i polistirena i kukuruznog skroba i poli(metakrilne kiseline) u rečnoj vodi. Ovi kopolimeri su sintetisani u prisustvu različitih aminoaktivatora. Sintetisani kopolimeri i produkta biodegradacije su karakterisani FTIR spektroskopijom i SEM mikroskopijom. Biodegradacija je praćena gubitkom mase uzoraka, a broj mikroorganizama Kohovom metodom. Stepen biodegradacije obe vrste kopolimera raste sa vremenom. Kalemljeni polimeri skroba i poli(metakrilne kiseline) potpuno se razgrađuju za 21 dan, dok se polimeri na bazi skroba i polistirena delimično razgrađuju nakon 27 dana (45,8-93,1 % od ukupne mase). Razlike u stepenu biodegradacije su posledica različite strukture uzoraka, a postoji i značajna negativna korelacija između udela polistirena u kopolimeru i stepena biodegradacije. Stepen kalemljenja polistirena (udeo polistirena u kopolimeru) koji sprečava biodegradaciju iznosio je 54 %. Na osnovu eksperimentalnih dokaza, predloženi su mehanizmi oba biodegradaciona procesa i ustanovljeni su uticaji količine skroba i sintetske komponente kopolimera na biodegradaciju.sr
dc.publisherSerbian Chemical Soc, Belgrade
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172001/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS//
dc.rightsopenAccess
dc.sourceJournal of the Serbian Chemical Society
dc.subjectgraft copolymersen
dc.subjectmodel river wateren
dc.subjectmodel river wateren
dc.subjectdegradation studyen
dc.subjectdegradation studyen
dc.subjectstatistical analysisen
dc.subjectstatistical analysisen
dc.titleBiodegradation of starch-graft-polystyrene and starch-graft-poly(methacrylic acid) copolymers in model river wateren
dc.titleBiodegradacija kalemljenih kopolimera skroba i polistirena i skroba i poli(metakrilne kiseline) u rečnoj vodisr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractAнтоновиц, Дусан; Велицковиц, Сава; Поповић, Aлександар; Николић, Владимир; Биодеградација калемљених кополимера скроба и полистирена и скроба и поли(метакрилне киселине) у речној води; Биодеградација калемљених кополимера скроба и полистирена и скроба и поли(метакрилне киселине) у речној води;
dc.citation.volume78
dc.citation.issue9
dc.citation.spage1425
dc.citation.epage1441
dc.identifier.wos000326199200013
dc.identifier.doi10.2298/JSC121216051N
dc.citation.other78(9): 1425-1441
dc.citation.rankM23
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-84885106933
dc.identifier.fulltexthttp://cherry.chem.bg.ac.rs/bitstream/id/8556/1423.pdf
dc.identifier.rcubKon_2545


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