A shear stabilized biaxial texture in a lamellar block copolymer

Conference · Tue Dec 31 00:00:00 EST 1996

OSTI ID:468798

Polis, D L; Pinheiro, B S; Winey, K I; Lakis, R E ^[1]

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1. Univ. of Pennsylvania, Philadelphia, PA (United States)

Block copolymers spontaneously self-assemble into a variety of morphologies. Recent studies have produced a biaxial texture in poly(styrene-b-ethylene propylene), SEP, diblock copolymers by applying oscillatory shear. This biaxial texture consists of {open_quotes}parallel{close_quotes} lamellae (normal to lamellae aligned perpendicular to shearing surfaces) and {open_quotes}transverse{close_quotes} lamellae (normal to lamellae aligned parallel to shearing direction) according to small-angle X-ray scattering, SAXS. The present study has determined how these two populations of lamellae are arranged and how they relax upon quiescent annealing by examining the superstructure via FE-SEM.

• OSTI ID: 468798
• Report Number(s): CONF-960877-; TRN: 97:001308-0052
• Resource Relation: Conference: Microscopy and microanalysis 1996, Minneapolis, MN (United States), 11-15 Aug 1996; Other Information: PBD: 1996; Related Information: Is Part Of Microscopy and microanalysis 1996; Bailey, G.W.; Corbett, J.M.; Dimlich, R.V.W.; Michael, J.R.; Zaluzec, N.J. [eds.]; PB: 1107 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
POLYSTYRENE
MORPHOLOGY
POLYETHYLENES
POLYPROPYLENE
COPOLYMERS
TEXTURE
IMAGES
SCANNING ELECTRON MICROSCOPY