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The effect of the architecture and concentration of styrene-butadiene compatibilizers on the morphology of polystyrene/low-density polyethylene blends

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dc.title The effect of the architecture and concentration of styrene-butadiene compatibilizers on the morphology of polystyrene/low-density polyethylene blends en
dc.contributor.author Fortelný, Ivan
dc.contributor.author Šlouf, Miroslav
dc.contributor.author Sikora, Antonín
dc.contributor.author Hlavatá, Drahomíra
dc.contributor.author Hášová, Věra
dc.contributor.author Mikešová, Jana
dc.contributor.author Jacob, Ceni
dc.relation.ispartof Journal of Applied Polymer Science
dc.identifier.issn 0021-8995 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2006-05-15
utb.relation.volume 100
utb.relation.issue 4
dc.citation.spage 2803
dc.citation.epage 2816
dc.type article
dc.language.iso en
dc.publisher John Wiley & Sons, Inc. en
dc.identifier.doi 10.1002/app.23731
dc.relation.uri http://onlinelibrary.wiley.com/doi/10.1002/app.23731/abstract
dc.subject polymer blends en
dc.subject compatibilization en
dc.subject styrene-butadiene en
dc.subject block copolymers en
dc.subject polystyrene en
dc.subject low-density polyethylene en
dc.description.abstract The effect of styrene-butadiene block copolymers (SB) witli varying number of blocks and length of styrene blocks on the morphology, rheology, and impact strength of 4/1 polystyrene/ low-density polyethylene (PS/ LDPE) blends was studied. The scanning and transmission electron microscopy and X-ray scattering were used for determination of the size of LDPE particles and the localization and structure of SB copolymers in blends. It is shown that the dependence of the LDPE particle size on the amount of added SB and localization of SB copolymers in blends is predominantly controlled by the length of their Styrene blocks. It follows from thermodynamic considerations that the reason is the difference in composition asymmetry between SB with short and long styrene blocks. Coalescence of particles of SB having short styrene blocks at the surface of LDPE droplets and movement of SB with long styrene blocks to the PS-LDPE interface were observed during annealing of PS/LDPE/SB blends. Pronounced migration of SB copolymer during annealing shows that their localizations in blends in steady state on long steady mixing and at thermodvnamic equilibrium are different. The values of tensile impact strength of PS/LDPE/SB blends correlate well with the size of LDPE particles and the amount of SB at the interface. Viscosity of BS/LDPE/SB depends on molecular structure of SB copolymers by a manner different from that of tensile impact strength. The results of this Study and literature data lead to the conclusion that the compatibilization efficiency of SB copolymers for a certain polystyrenepolyolefin pair is a function of not only molecular parameters of SB but also of the polystyrene/polyolefin ratio, the amount of SB in a blend, and mixing and processing conditions. (c) 2006 Wiley Periodicals, Inc. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1002072
utb.identifier.obdid 43865429
utb.identifier.scopus 2-s2.0-33645771988
utb.identifier.wok 000236423600030
utb.identifier.coden JAPNA
utb.source j-wok
dc.date.accessioned 2011-08-16T15:06:22Z
dc.date.available 2011-08-16T15:06:22Z
utb.contributor.internalauthor Fortelný, Ivan
utb.contributor.internalauthor Sikora, Antonín
utb.scopus.affiliation Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic; Joint Laboratory for Polymer Materials, Tomas Bata University Zlín, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic
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