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Small-Angle X-Ray Scattering Study of Microand Macro-Phase Separations in Blends of Block Copolymer with Homopolymer

Published online by Cambridge University Press:  26 February 2011

R. J. Roe  and
S. Nojima
R. J. Roe
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, OR 45221-0012
S. Nojima
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, OR 45221-0012
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Abstract

The order-disorder phase transition behavior exhibited by blends of a styrene-butadiene diblock copolymer (76% styrene) with a polystyrene of various molecular weight (from 2,200 to 50,000) is studied by means of small-angle X-ray scattering. With a polystyrene of a relatively short chain length the blend, on lowering the temperature, undergoes a microphase separation, and the scattering curve shows a peak at a finite scattering angle. With a polystyrene of relatively long chain length, the scattered intensity curve shows additional low angle component with intensity increasing rapidly as q→0, and this is interpreted in terms of the macrophase separation accompanying the transition from the disordered to ordered phase.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 79: Symposium F – Scattering, Deformation and Fracture in Polymers , 1986 , 151
Copyright
Copyright © Materials Research Society 1987

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References

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