Deviation from time-composition equivalence in polymer solutions with selective cosolvents

Deviation from time-composition equivalence in polymer solutions with selective cosolvents

Time-composition superpositioning (tCS) permits determination of the mechanical properties of polymeric materials over a widely extended time (or frequency) domain by systematically varying composition under isothermal conditions. We have recently reported (Soft Matter, 6, 4331, 2010) the existence...

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Main Authors: Arjun S. Krishnan, Richard J. Spontak
Format: Article
Language:English
Published: AIP Publishing LLC 2011-12-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.3666980
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spelling doaj-cf34c480bf9d4b29a0e4a186e99ac8442020-11-24T21:35:47ZengAIP Publishing LLCAIP Advances2158-32262011-12-0114042159042159-610.1063/1.3666980065104ADVDeviation from time-composition equivalence in polymer solutions with selective cosolventsArjun S. Krishnan0Richard J. Spontak1Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, USADepartment of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, USATime-composition superpositioning (tCS) permits determination of the mechanical properties of polymeric materials over a widely extended time (or frequency) domain by systematically varying composition under isothermal conditions. We have recently reported (Soft Matter, 6, 4331, 2010) the existence of such equivalence in technologically relevant triblock copolymers swollen with miscible, midblock-selective cosolvents differing in chemical constitution and viscosity. In this study, chemically homologous homopolymer and copolymer systems exhibiting rheological properties that deviate from tCS are investigated. With regard to the particular case of selectively solvated triblock copolymers, the source of deviation is explained in the context of endblock hopping.http://dx.doi.org/10.1063/1.3666980
collection DOAJ
language English
format Article
sources DOAJ
author Arjun S. Krishnan
Richard J. Spontak
spellingShingle Arjun S. Krishnan
Richard J. Spontak
Deviation from time-composition equivalence in polymer solutions with selective cosolvents
AIP Advances
author_facet Arjun S. Krishnan
Richard J. Spontak
author_sort Arjun S. Krishnan
title Deviation from time-composition equivalence in polymer solutions with selective cosolvents
title_short Deviation from time-composition equivalence in polymer solutions with selective cosolvents
title_full Deviation from time-composition equivalence in polymer solutions with selective cosolvents
title_fullStr Deviation from time-composition equivalence in polymer solutions with selective cosolvents
title_full_unstemmed Deviation from time-composition equivalence in polymer solutions with selective cosolvents
title_sort deviation from time-composition equivalence in polymer solutions with selective cosolvents
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2011-12-01
description Time-composition superpositioning (tCS) permits determination of the mechanical properties of polymeric materials over a widely extended time (or frequency) domain by systematically varying composition under isothermal conditions. We have recently reported (Soft Matter, 6, 4331, 2010) the existence of such equivalence in technologically relevant triblock copolymers swollen with miscible, midblock-selective cosolvents differing in chemical constitution and viscosity. In this study, chemically homologous homopolymer and copolymer systems exhibiting rheological properties that deviate from tCS are investigated. With regard to the particular case of selectively solvated triblock copolymers, the source of deviation is explained in the context of endblock hopping.
url http://dx.doi.org/10.1063/1.3666980
work_keys_str_mv AT arjunskrishnan deviationfromtimecompositionequivalenceinpolymersolutionswithselectivecosolvents
AT richardjspontak deviationfromtimecompositionequivalenceinpolymersolutionswithselectivecosolvents
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