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Phase Separation In Blends of Polystyrene and Poly (P-METHYLSTYRENE) Using Thermal Analysis And Small-Angle Neutron Scattering

Published online by Cambridge University Press:  15 February 2011

A. Xenopoulos ,
J. D. Londono ,
G. D. Wígnall  and
B. Wunderlich
A. Xenopoulos
Affiliation:
Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6197, and Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600
J. D. Londono
Affiliation:
Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6197, and Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600
G. D. Wígnall
Affiliation:
Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6197, and Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600
B. Wunderlich
Affiliation:
Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6197, and Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600
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Abstract

Differential scanning calorimetry (DSC) was used to study blends of polystyrene (PS) and poly (p-Methylstyrene) (PpmS). The presence of two glass transitions on heating after quenching was interpreted as evidence of phase separation at the temperature of the liquid before quenching. The small difference between the glass transitions of the homopolymers in the PS/PpmS system of “13 K limits the reliable detection of double glass transitions for blends to concentrations between 30 and 70%. The results of the DSC technique are supported by comparison with small angle neutron scattering (SANS) data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 107
Copyright
Copyright © Materials Research Society 1994

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References

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