Miscibility of Solution Blends

Varada Rajulu et al. [13] carried out miscibility studies of polystyrene/poly(vinyl pyrrolidone) (PS/PVP) and poly(methyl methacrylate)/poly(vinylpyrrolidone) 

Pandey et al. [14] characterized the compatibility of immiscible binary blends of acrylonitrile-co-butadiene rubber (NBR) and ethylene proplylenediene rubber (EPDM) by using ultrasonic interferometry. Variations in the ultrasonic velocity of solution blends at room temperature with respect to the varied blend ratios, as 

Sidkey et al. [15] measured the longitudinal ultrasonic velocity and ultrasonic attenuation of four blend systems - namely Adiprene CM/NBR, Adiprene CM/ natural rubber (NR), Adiprene E/NR, and Adiprene E/NBR-at room temperature, using the pulse-echo technique. The relationship between the measured ultrasonic absorption and temperature and the glass transition temperature (Tg) of the 

F re 8.7 Variation of attenuation coefficient of Adiprene CM/NBR blends with temperature [15]. 

ENR/EPDM system. This behavior also indicated a good miscibility between two rubber components. It has been also been suggested that a linear relation between ultrasonic velocity and composition could be interpreted as a sign of the presence of single-phase morphology [50-53]. 

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