This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1021/ma502518p in citations.
Influence of the Solvent Quality on Ring Polymer Dimensions
Influence of the Solvent Quality on Ring Polymer Dimensions
We present a systematic investigation of well-characterized, experimentally pure polystyrene (PS) rings with molar mass of 161 000 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 mas...
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Personal Name(s): | Goossen, Sebastian (Corresponding Author) |
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Bras, Ana / Pyckhout-Hintzen, Wim / Wischnewski, Andreas / Richter, Dieter / Rubinstein, Michael / Roovers, Jacques / Lutz, Pierre J. / Jeong, Youncheol / Chang, Taihyun / Vlassopoulos, Dimitris | |
Contributing Institute: |
Neutronenstreuung; JCNS-1 Neutronenstreuung; ICS-1 |
Published in: | Macromolecules, 48 (2015) 5, S. 1598–1605 |
Imprint: |
Washington, DC
Soc.
2015
|
DOI: |
10.1021/ma502518p |
Document Type: |
Journal Article |
Research Program: |
Soft Matter, Health and Life Sciences Jülich Centre for Neutron Research (JCNS) Functional Macromolecules and Complexes |
Publikationsportal JuSER |
We present a systematic investigation of well-characterized, experimentally pure polystyrene (PS) rings with molar mass of 161 000 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. |