How good is the bead-spring model?

S. Amelar, C. E. Eastman, T. P. Lodge, E. D. von Meerwall

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The predictions of the bead-spring model are compared with the infinite dilution dynamic properties of polystyrene in Aroclor 1248, as a function of molecular weight. The experimentally determined quantities include the longest relaxation time and the relaxation-time spectrum, obtained via oscillatory flow birefringence; the diffusion coefficient, measured by NMR and forced Rayleigh scattering; the radius of gyration, determined by small-angle neutron scattering; and the intrinsic viscosity. In all cases, the data are very well described by the model, using a consistent set of three parameters. However, the conformational dynamics experiments suggest a surprisingly sharp end to the relaxation spectrum, corresponding to the relaxation time for an approximately 50-monomer subchain.

Original languageEnglish (US)
Pages (from-to)551-555
Number of pages5
JournalJournal of Non-Crystalline Solids
Issue numberPART 2
StatePublished - Jun 2 1991

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation (DMR-8319291 and DMR-8715391) and the University of Minnesota/NSF Center for Interfacial Engineering. The authors are also indebted to J.L. Schrag and his research group for many helpful discussions, and their willingness to make their results available.


Dive into the research topics of 'How good is the bead-spring model?'. Together they form a unique fingerprint.

Cite this