Determination of the interaction parameter and topological scaling features of symmetric star polymers in dilute solution

Handle URI:
http://hdl.handle.net/10754/575987
Title:
Determination of the interaction parameter and topological scaling features of symmetric star polymers in dilute solution
Authors:
Rai, Durgesh K.; Beaucage, Gregory; Ratkanthwar, Kedar ( 0000-0002-6324-696X ) ; Beaucage, Peter; Ramachandran, Ramnath; Hadjichristidis, Nikolaos ( 0000-0003-1442-1714 )
Abstract:
Star polymers provide model architectures to understand the dynamic and rheological effects of chain confinement for a range of complex topological structures like branched polymers, colloids, and micelles. It is important to describe the structure of such macromolecular topologies using small-angle neutron and x-ray scattering to facilitate understanding of their structure-property relationships. Modeling of scattering from linear, Gaussian polymers, such as in the melt, has applied the random phase approximation using the Debye polymer scattering function. The Flory-Huggins interaction parameter can be obtained using neutron scattering by this method. Gaussian scaling no longer applies for more complicated chain topologies or when chains are in good solvents. For symmetric star polymers, chain scaling can differ from ν=0.5(df=2) due to excluded volume, steric interaction between arms, and enhanced density due to branching. Further, correlation between arms in a symmetric star leads to an interference term in the scattering function first described by Benoit for Gaussian chains. In this work, a scattering function is derived which accounts for interarm correlations in symmetric star polymers as well as the polymer-solvent interaction parameter for chains of arbitrary scaling dimension using a hybrid Unified scattering function. The approach is demonstrated for linear, four-arm and eight-arm polyisoprene stars in deuterated p-xylene.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Determination of the interaction parameter and topological scaling features of symmetric star polymers in dilute solution 2015, 92 (1) Physical Review E
Publisher:
American Physical Society (APS)
Journal:
Physical Review E
Issue Date:
15-Jul-2015
DOI:
10.1103/PhysRevE.92.012602
Type:
Article
ISSN:
1539-3755; 1550-2376
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevE.92.012602
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorRai, Durgesh K.en
dc.contributor.authorBeaucage, Gregoryen
dc.contributor.authorRatkanthwar, Kedaren
dc.contributor.authorBeaucage, Peteren
dc.contributor.authorRamachandran, Ramnathen
dc.contributor.authorHadjichristidis, Nikolaosen
dc.date.accessioned2015-08-27T06:00:02Zen
dc.date.available2015-08-27T06:00:02Zen
dc.date.issued2015-07-15en
dc.identifier.citationDetermination of the interaction parameter and topological scaling features of symmetric star polymers in dilute solution 2015, 92 (1) Physical Review Een
dc.identifier.issn1539-3755en
dc.identifier.issn1550-2376en
dc.identifier.doi10.1103/PhysRevE.92.012602en
dc.identifier.urihttp://hdl.handle.net/10754/575987en
dc.description.abstractStar polymers provide model architectures to understand the dynamic and rheological effects of chain confinement for a range of complex topological structures like branched polymers, colloids, and micelles. It is important to describe the structure of such macromolecular topologies using small-angle neutron and x-ray scattering to facilitate understanding of their structure-property relationships. Modeling of scattering from linear, Gaussian polymers, such as in the melt, has applied the random phase approximation using the Debye polymer scattering function. The Flory-Huggins interaction parameter can be obtained using neutron scattering by this method. Gaussian scaling no longer applies for more complicated chain topologies or when chains are in good solvents. For symmetric star polymers, chain scaling can differ from ν=0.5(df=2) due to excluded volume, steric interaction between arms, and enhanced density due to branching. Further, correlation between arms in a symmetric star leads to an interference term in the scattering function first described by Benoit for Gaussian chains. In this work, a scattering function is derived which accounts for interarm correlations in symmetric star polymers as well as the polymer-solvent interaction parameter for chains of arbitrary scaling dimension using a hybrid Unified scattering function. The approach is demonstrated for linear, four-arm and eight-arm polyisoprene stars in deuterated p-xylene.en
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevE.92.012602en
dc.rightsArchived with thanks to Physical Review Een
dc.titleDetermination of the interaction parameter and topological scaling features of symmetric star polymers in dilute solutionen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Een
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionBiology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN-37831, USAen
dc.contributor.institutionMaterials Science and Engineering, University of Cincinnati, Cincinnati, OH-45221, USAen
dc.contributor.institutionDepartment of Chemistry, University of Athens, Panepistimiopolis, Zografou, 15771, Athens, Greeceen
dc.contributor.institutionDepartment of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USAen
dc.contributor.institutionProcter & Gamble, 1 P&G Plaza, Cincinnati, OH-45202, USAen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorHadjichristidis, Nikolaosen
kaust.authorRatkanthwar, Kedaren
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.