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dc.contributor.authorRai, Durgesh K.
dc.contributor.authorBeaucage, Gregory
dc.contributor.authorRatkanthwar, Kedar
dc.contributor.authorBeaucage, Peter
dc.contributor.authorRamachandran, Ramnath
dc.contributor.authorHadjichristidis, Nikos
dc.date.accessioned2016-05-11T07:29:17Z
dc.date.available2016-05-11T07:29:17Z
dc.date.issued2016-05-05
dc.identifier.citationQuantification of interaction and topological parameters of polyisoprene star polymers under good solvent conditions 2016, 93 (5) Physical Review E
dc.identifier.issn2470-0045
dc.identifier.issn2470-0053
dc.identifier.pmid27300939
dc.identifier.doi10.1103/PhysRevE.93.052501
dc.identifier.urihttp://hdl.handle.net/10754/609003
dc.description.abstractMass fractal scaling, reflected in the mass fractal dimension df, is independently impacted by topology, reflected in the connectivity dimension c, and by tortuosity, reflected in the minimum dimension dmin. The mass fractal dimension is related to these other dimensions by df=cdmin. Branched fractal structures have a higher mass fractal dimension compared to linear structures due to a higher c, and extended structures have a lower dimension compared to convoluted self-avoiding and Gaussian walks due to a lower dmin. It is found, in this work, that macromolecules in thermodynamic equilibrium display a fixed mass fractal dimension df under good solvent conditions, regardless of chain topology. These equilibrium structures accommodate changes in chain topology such as branching c by a decrease in chain tortuosity dmin. Symmetric star polymers are used to understand the structure of complex macromolecular topologies. A recently published hybrid Unified scattering function accounts for interarm correlations in symmetric star polymers along with polymer-solvent interaction for chains of arbitrary scaling dimension. Dilute solutions of linear, three-arm and six-arm polyisoprene stars are studied under good solvent conditions in deuterated p-xylene. Reduced chain tortuosity can be viewed as steric straightening of the arms. Steric effects for star topologies are quantified, and it is found that steric straightening of arms is more significant for lower-molecular-weight arms. The observation of constant df is explained through a modification of Flory-Krigbaum theory for branched polymers.
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevE.93.052501
dc.rightsArchived with thanks to Physical Review E
dc.titleQuantification of interaction and topological parameters of polyisoprene star polymers under good solvent conditions
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentPolymer Synthesis Laboratory
dc.identifier.journalPhysical Review E
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionBiology and Soft Matter Division, Oak Ridge National Laboratory, P.O. Box 2008, MS-6454 Oak Ridge, Tennessee 37831, USA
dc.contributor.institutionMaterials Science and Engineering, University of Cincinnati, 492 Rhodes Hall, Cincinnati, Ohio 45221, USA
dc.contributor.institutionDepartment of Chemistry, University of Athens, Panepistimiopolis, Zografou 15771, Athens, Greece
dc.contributor.institutionDepartment of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
dc.contributor.institutionProcter & Gamble, 1 P&G Plaza, Cincinnati, Ohio 45202, USA
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personRatkanthwar, Kedar
kaust.personHadjichristidis, Nikos
refterms.dateFOA2018-06-13T13:14:35Z


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