Blends of poly(styrene-ran-2,4-dinitrostyrene) with poly(vinyl methyl ether) and poly(2,6-dimethyl-1,4-phenylene oxide)

• Published in: Polymer (Guilford) Vol. 38; no. 11; pp. 2767 - 2772
• Main Authors: Fernández, M.D., Fernández, M.J., McEwen, I.J.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.05.1997; Elsevier
• Subjects: Applied sciences; copolymers; Exact sciences and technology; interaction energy density; miscibility; Organic polymers; Physicochemistry of polymers; Properties and characterization; Thermal and thermodynamic properties; copolymers; interaction energy density; miscibility; Random copolymer; Property composition relationship; Methyl vinyl ether polymer; Miscibility; Energy density; Styrene derivative copolymer; Thermodynamic properties; Experimental study; Interaction energy; Mixture; Phenylene oxide(dimethyl) polymer; Styrene copolymer
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/S0032-3861(97)85613-3

Phase boundaries and lower critical solution temperatures for blends of random styrene-dinitrostyrene copolymers with poly(vinyl methyl ether) and with poly(2,6-dimethyl-1,4-phenylene oxide) have been established. From an analysis of phase behaviour in terms of the overall blend interaction energy density the relevant segmental interaction energy densities have been evaluated and these have been compared with the corresponding energy densities for mononitrated copolymers. It was concluded that nitro group substitution has an adverse effect on mixing with poly(vinyl methyl ether) despite its electron withdrawing capabilities, and causes a similar effect in poly(2,6-dimethyl-1,4-phenylene oxide) mixtures for primarily structural reasons.