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Nanostructured Change of SIS (Styrene-Isoprene-Styrene) Triblock Copolymer by Elongational Flow

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Abstract:

Elongation deformation was conducted on a polystyrene-block-polyisoprene-block-polystyrene (SIS) triblock copolymer which contains cylindrical microdomains composed of polystyrene block chains in matrix of polyisoprene block chains. The extensional flow behavior of this deformation triblock copolymer melt, which exhibits a cylindrical phase, has been examined by using elongational deformation with o between 0.1 and 1.0 s−1 at different temperatures. The structures related to various condition of elongational flow deformation has been determined from SAXS patterns by considering separately changes in the single particle scattering, which influence the scattering patterns. The TEM and SAXS data of the samples show that the cylindrical PS-domain was deformed along the direction of elongation. It also shows that the cylindrical microdomains are micronecked and deformed with various strain rates.

Keywords: ELONGATIONAL DEFORMATION; MICRODOMAINS; TRIBLOCK COPOLYMER

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2008.IC12

Publication date: September 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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