ANISOTROPIC LIGHT-SCATTERING STUDY OF THE PHYSICAL GELATION OF ATACTIC POLYSTYRENE IN CARBON-DISULFIDE

Authors
LEHSAINI N FRANCOIS J WEILL G
Citation
N. Lehsaini et al., ANISOTROPIC LIGHT-SCATTERING STUDY OF THE PHYSICAL GELATION OF ATACTIC POLYSTYRENE IN CARBON-DISULFIDE, Macromolecules, 26(26), 1993, pp. 7333-7338
Citations number
30
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
26
Issue
26
Year of publication
1993
Pages
7333 - 7338
Database
ISI
SICI code
0024-9297(1993)26:26<7333:ALSOTP>2.0.ZU;2-2
Abstract
The physical gelation of the solutions of atactic polystyrene (aPS) in carbon disulfide (CS2) is studied from the excess of anisotropic ligh t scattering, deltaH(v). An abrupt jump of deltaH(v) at gelation tempe rature shows that a part of the chains is stiffened upon gelation. Thi s effect which is independent of aPS molecular weight strongly decreas es with concentration. The compatibility of this abrupt jump with the thermodynamic theories used to interpret the concentration and molecul ar weight dependence of the gelation temperature is discussed.