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Measurements of persistence length and temperature dependence of the radius of gyration in bulk atactic polystyrene

โœ Scribed by G.D. Wignall; D.G.H. Ballard; J. Schelten

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
342 KB
Volume
10
Category
Article
ISSN
0014-3057

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โœฆ Synopsis

Measurements of radius of gyration, (SZ) ~, and persistence length of polymer molecules in bulk atactic polystyrene have been made by means of low angle neutron scattering. The measured values of (S 2 )~ lie close to those measured in 0:solvents and have a molecular weight dependence of M -*+~ where E = 0.04 + 0.04. The molecular configuration agrees closely with that of a random coil with a persistence length -10~.. These measurements support the model of an unperturbed Gaussian coil for this polymer. Measurements of(S2) ยฝ throughout the glass transition region indicate that the overall conformation of the polymer chain does not change on heating through this region.

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