Influence of the solvent quality on ring polymer dimensions

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DOIResolve DOI: http://doi.org/10.1021/ma502518p
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TypeArticle
Journal titleMacromolecules
ISSN0024-9297
Volume48
Issue5
Pages15981605; # of pages: 8
SubjectApproximation theory; Chains; Dynamic light scattering; Light scattering; Nanocomposites; Neutron scattering; Polymers; Dilute solution; Linear polymers; Ring dimension; Ring polymers; Role of solvents; Solution preparations; Solvent conditions; Solvent quality; Solvents
AbstractWe present a systematic investigation of well-characterized, experimentally pure polystyrene (PS) rings with molar mass of 161000 g/mol in dilute solutions. We measure the ring form factor at θ- and good-solvent conditions as well as in a polymeric solvent (linear PS of roughly comparable molar mass) by means of small-angle neutron scattering (SANS). Additional dynamic light scattering (DLS) measurements support the SANS data and help elucidate the role of solvent quality and solution preparation. The results indicate the increase of ring dimensions as the solvent quality improves. Furthermore, the experimental form factors in both θ-solvent and linear matrix behave as ideal rings and are fully superimposable. The nearly Gaussian conformations of rings in a melt of linear chains provide evidence of threading of linear chains through rings. The latter result has implications for the dynamics of ring-linear polymer mixtures.
Publication date
PublisherACS Publications
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number21275750
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Record identifier202dd2db-3271-45e3-8c33-613a38203f1b
Record created2015-07-14
Record modified2016-05-09
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