Miscibility diagrams of random copolymer blend systems

The miscibility of copolymers AxB1−x and AyB1−y, derived from the same monomer pair (A, B) but differing in composition, was studied. The systems (A, B) were (S, MMA), (BMA, MMA), (S, BMA), and (CIS, BMA) (S: styrene, CIS: p‐chlorostyrene, MMA: methylmethacrylate, BMA: n‐butylmethacrylate). Miscibil...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1992-05, Vol.30 (6), p.577-586
Main Authors: Braun, D., Yu, D., Kohl, P. R., Gao, X., Andradi, L. N., Manger, E., Hellmann, G. P.
Format: Article
Language:English
Subjects:
Applied sciences
blends
blends, copolymer, miscibility diagrams of
copolymer
copolymers
copolymers, miscibility diagrams of blends of
Exact sciences and technology
miscibility diagrams of
miscibility diagrams of blends of
miscibility of random copolymer blends
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:The miscibility of copolymers AxB1−x and AyB1−y, derived from the same monomer pair (A, B) but differing in composition, was studied. The systems (A, B) were (S, MMA), (BMA, MMA), (S, BMA), and (CIS, BMA) (S: styrene, CIS: p‐chlorostyrene, MMA: methylmethacrylate, BMA: n‐butylmethacrylate). Miscibility diagrams were recorded, at low and high temperatures, using cast films and dry films. All blend systems feature hightemperature miscibility gaps. Unusual effects of the compositions x and y on miscibility in blends AxB1−x/AyB1−y were observed. The classical prediction that miscibility should depend only on the composition difference |x – y| usually is too simple. It appears necessary to consider dyad interactions.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1992.090300609