PHYSICAL GELATION IN A TRIBLOCK COPOLYMER SOLUTION - IN-SITU STUDY OFSTRESS-STRAIN BEHAVIOR AND STRUCTURAL DEVELOPMENT

Authors
KLEPPINGER R VANES M MISCHENKO N KOCH MHJ REYNAERS H
Citation
R. Kleppinger et al., PHYSICAL GELATION IN A TRIBLOCK COPOLYMER SOLUTION - IN-SITU STUDY OFSTRESS-STRAIN BEHAVIOR AND STRUCTURAL DEVELOPMENT, Macromolecules, 31(17), 1998, pp. 5805-5809
Citations number
19
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
31
Issue
17
Year of publication
1998
Pages
5805 - 5809
Database
ISI
SICI code
0024-9297(1998)31:17<5805:PGIATC>2.0.ZU;2-C
Abstract
An in situ study of the microstructure and mechanical properties of po lystyrene-poly(ethylene-butylene)-poly styrene (SEBS) triblock copolym er gels was performed. Simultaneous time-resolved synchrotron radiatio n X-ray scattering and stress-strain measurements at extensions up to lambda = 2 indicate that the macroscopic deformations are transferred to a microscopic level via the threedimensional network of microdomain s. The deformation of the microstructure is nonaffine at low extension rates (4 x 10(-4) s(-1)) and becomes affine at higher rates (10(-2) s (-1)).