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On the stress-strain behavior of thermoplastic starch melts

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dc.title On the stress-strain behavior of thermoplastic starch melts en
dc.contributor.author Thunwall, Mats
dc.contributor.author Boldizar, Antal
dc.contributor.author Rigdahl, Mikael
dc.contributor.author Kuthanová, Vanda
dc.relation.ispartof International Journal of Polymer Analysis and Characterization
dc.identifier.issn 1023-666X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2006
utb.relation.volume 11
utb.relation.issue 6
dc.citation.spage 419
dc.citation.epage 428
dc.type article
dc.language.iso en
dc.publisher Taylor and Francis en
dc.identifier.doi 10.1080/10236660600983692
dc.relation.uri http://www.tandfonline.com/doi/abs/10.1080/10236660600983692
dc.subject melt extension en
dc.subject rheology en
dc.subject starch en
dc.subject thermoplastic starch en
dc.description.abstract Different grades of starch, glycerol, and water were blended in order to produce a series of thermoplastic starch materials. The starch grades used included native potato starch and modified grades of native potato starch, high amylose potato starch, and amylopectin potato starch. The modification of the latter three grades involved hydroxypropylation and oxidation. The main focus of the study was on the stress-strain properties or the drawability of the thermoplastic starch melts at 120 degrees or 140 degrees C. At these temperatures, the ultimate strain of the starch materials was found to be significantly lower than that of a high-density polyethylene reference at 180 degrees C. In general, the strain at break of the melts based on the native potato starch and the modified native potato starch tended to increase when increasing the glycerol content (and the corresponding amount of water) but decreased as the melt temperature was increased from 120 degrees to 140 degrees C. The chemical modification of the native potato starch appeared to promote the drawability of the melt. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1002087
utb.identifier.obdid 43865420
utb.identifier.scopus 2-s2.0-33750892584
utb.identifier.wok 000241894700003
utb.source j-wok
dc.date.accessioned 2011-08-16T15:06:27Z
dc.date.available 2011-08-16T15:06:27Z
utb.contributor.internalauthor Kuthanová, Vanda
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