Blends of poly(styrene-stat-acrylonitrile) and poly(butadiene-stat-acrylonitrile): a guide to the butadiene-acrylonitrile segmental interaction

A range of butadiene--acrylonitrile and of styrene--acrylonitrile statistical copolymers have been synthesized and blended to establish a value for the segmental interaction energy density between butadiene and acrylonitrile. Two series of blends were examined. In the first series, "internal&qu...

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Bibliographic Details
Published in:Macromolecules 1992-09, Vol.25 (20), p.5287-5290
Main Authors: Cowie, J. M. G, Harris, John H, McEwen, Iain J
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:A range of butadiene--acrylonitrile and of styrene--acrylonitrile statistical copolymers have been synthesized and blended to establish a value for the segmental interaction energy density between butadiene and acrylonitrile. Two series of blends were examined. In the first series, "internal" blends from butadiene--acrylonitrile copolymers of different composition were found to be miscible only when the compositions differed by < approx 4 vol.%. In contrast, blends of butadiene--acrylonitrile copolymers with styrene--acrylonitrile copolymers formed a fairly extensive miscibility region which was analyzed by considering this to form part of a conic section in composition space. A value for the butadiene--acrylonitrile segmental interaction energy density B sub B--AN of 33-37 J cm exp --3 appropriately describes the phase behavior in this system.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma00046a028