Приказ основних података о документу

dc.creatorJeremić, Katarina B.
dc.creatorDunjić, Branko
dc.creatorĐonlagić, Jasna
dc.creatorJovanović, Slobodan
dc.date.accessioned2021-03-10T09:43:38Z
dc.date.available2021-03-10T09:43:38Z
dc.date.issued1998
dc.identifier.issn0352-5139
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/171
dc.description.abstractThermoplastic starch (TPS) was blended in a twin screw mixer with 5 and 10 mass % of poly(ethylene-co-acrylic acid) (EAA), poly(ethylene-co-vinyl acetate) (EVA) or cellulose acetate (CA) in order to improve the TPS properties. The influence of such low amounts of thermoplastic polymer (TPP) on the processability, mechanical properties and water resistance of TPS was investigated. The specimens for mechanical properties determinaiton were conditioned at 45, 67 acid 85% relative humidity (RH) before measurements. Processability, characterized by viscosity vs. shear rate dependence, was determined by capillary rheometry. The obtained results showed that the TPS blends behaved as pseudoplastic polymers and that even 10 mass% of EAA or EVA significantly decreased the TPS viscosity, whereas addition of the same amount of CA had no influence on the TPS viscosity. Tensile measurements showed that the RH had a much larger influence on the tensile properties than the addition of the investigated TPP. Tensile strength and tensile modulus values for TPS and its blends, after conditioning at 45% RH were an order of magnitude larger than the values for the corresponding samples kept at 85% RH, whereas elongation at break values were nearly ten times smaller. Dynamic mechanical analysis of the TPS and its blends was performed using a mechanical spectrometer. The specimens were subjected to dynamic torsion at a constant frequency in the temperature range from 30 to 170 degrees C. The glass transition temperature, determined from the temperature dependence of tan delta, was influenced much more by relative humidity than by the type of TPP used. The swelling of the TPS and the investigated blends was determined gravimetrically. It was found that the TPS/EAA blends had the largest water resistance.en
dc.publisherSerbian Chemical Society, Belgrade
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceJournal of the Serbian Chemical Society
dc.subjectthermoplastic starchen
dc.subjectblends with poly(ethylene-co-acrylic acid), poly(ethylene-co-vinyl acetate) and cellulose acetateen
dc.subjectcapillary rheometry measurementsen
dc.subjecttensile propertiesen
dc.subjectdynamic mechanical analysisen
dc.subjectswelling measurementsen
dc.titleBlends of thermoplastic starch and some thermoplastic polymersen
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage762
dc.citation.issue10
dc.citation.other63(10): 753-762
dc.citation.spage753
dc.citation.volume63
dc.identifier.pmid
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_171
dc.identifier.scopus2-s2.0-0032275765
dc.identifier.wos000076247200001
dc.type.versionpublishedVersion


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