Nonflexible coils in solution : a neutron spin-echo investigation of alkyl-substituted polynorbornenes in tetrahydrofuran

Title data

Monkenbusch, Michael ; Allgaier, Jürgen ; Richter, Dieter ; Stellbrink, Jörg ; Fetters, Lewis J. ; Greiner, Andreas:
Nonflexible coils in solution : a neutron spin-echo investigation of alkyl-substituted polynorbornenes in tetrahydrofuran.
In: Macromolecules. Vol. 39 (2006) Issue 26 . - pp. 9473-9479.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma0618979

Official URL:

Abstract in another language

The dynamics of rigid random polymer coils in dilute solution has been investigated by neutron spin-echo (NSE) spectroscopy. The polymers used were polynorbornenes that consist of chains of the bridged norbornene rings with hexyl (PNBH) or propyl (PNBP) side groups. These polymer molecules have large internal rotation barriers that hinder conformational changes and give each chain a kind of individual shape memory. Thereby the chains exhibit a dynamical stiffness that leads to a significantly retarded relaxation as compared to flexible polyisoprene chains (PI). While the latter perfectly match the prediction of the Zimm model, the polynorbornene spectra display the signature of a dynamical stiffness due to the ``frozen'' coil conformation of the PNBH or PNBP chains.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	POLYMER-SOLUTIONS; LIGHT-SCATTERING; DYNAMICS; SIMULATIONS; MOLECULES; POLYISOBUTYLENE; POLYISOPRENES; SOLVENT; MELTS
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Result of work at the UBT:	No
DDC Subjects:	500 Science > 540 Chemistry
Date Deposited:	07 Apr 2015 11:09
Last Modified:	27 Jul 2023 13:52
URI:	https://eref.uni-bayreuth.de/id/eprint/9683