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  Microphase reorientation in block copolymer melts as detected via FT rheology and 2D SAXS

Langela, M., Wiesner, U., Spiess, H. W., & Wilhelm, M. (2002). Microphase reorientation in block copolymer melts as detected via FT rheology and 2D SAXS. Macromolecules, 35(8), 3198-3204.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-661F-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-6620-0
Genre: Journal Article

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 Creators:
Langela, M.1, Author              
Wiesner, U.1, Author              
Spiess, Hans Wolfgang1, Author              
Wilhelm, Manfred1, Author              
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: The alignment kinetics of the orientation/reorientation behavior of the microphase of a lamellarPS-b-PI diblock copolymer under large-amplitude oscillatory shear conditions is studied. By online monitoring the degree of the mechanical nonlinearity during the orientation process-as determined via the higher harmonics in Fourier transform (FT) rheology-and investigation of the orientational distribution by 2- dimensional small-angle X-ray scattering, we followed the kinetics of the microphase alignment for two different experimental shear conditions, Improved parallel alignment after increasing the shear frequency as well as spatially heterogeneous alignment via bimodal: parallel and perpendicular alignment of the lamellae is detected by both methods. Thus, FT rheology offers a new and simple way for online monitoring complex reorientation kinetics.

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Language(s): eng - English
 Dates: 2002-04-09
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: No review
 Identifiers: eDoc: 28514
ISI: 000174818600048
Other: P-02-39
 Degree: -

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Title: Macromolecules
  Alternative Title : Macromolecules
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 35 (8) Sequence Number: - Start / End Page: 3198 - 3204 Identifier: ISSN: 0024-9297