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  Microstructure and rheological properties of triblock copolymers under extrusion conditions

Geiger, K., Knoll, K., & Langela, M. (2002). Microstructure and rheological properties of triblock copolymers under extrusion conditions. Rheologica Acta, 41(4), 345-355.

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 Creators:
Geiger, K., Author
Knoll, K., Author
Langela, M.1, Author           
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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Free keywords: block copolymers; extrusion; capillary rheometry; viscoelastic properties; order parameter; form birefringence
 Abstract: Triblock copolymers with different microstructures were subjected to macroscopic deformations under extrusion using a miniaturized high pressure capillary rheometer. The rheological properties of the triblock copolymers investigated depend strongly on composition and configuration of the building units, which are microphase separated into complex morphologies, Under extrusion conditions they organize to stretched layer systems, which are perpendicular oriented in respect to the direction of the shear plane and the orientation decreases again at high shear rates. The macroscopic order leads to integral values of the order parameter from two- dimensional small X-ray scattering and form birefringence, which show a good correlation in the relevant shear rate range. Furthermore, a master curve of the form birefringence can be obtained.

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Language(s): eng - English
 Dates: 2002-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28675
ISI: 000176725000008
 Degree: -

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Title: Rheologica Acta
  Alternative Title : Rheol. Acta
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 41 (4) Sequence Number: - Start / End Page: 345 - 355 Identifier: ISSN: 0035-4511