Abstract
Rheological measurement has been an effective technique to characterize the miscibility of polymer blends. This article investigates the viscoelastic behavior of poly(styrene) (PS) and poly(styrene-co-acrylonitrile) (PSAN) binary solutions in tetrahydrofuran (THF) relative to PS/PSAN/THF ternary solutions mainly reporting the findings of the authors involving the correlation between the miscibility and rheological behavior. Rheological properties, such as shear viscosity, and shear stress as a function of shear rate were investigated for different blend compositions. Moreover, complex viscosity, loss and storage moduli were also investigated as functions of both the frequency and blend composition. The criterion of miscibility based on the rule of mixture has been discussed. The present study revealed very small window of miscibility as only composition, 50/50 showed values close to the additivity rule or intermediate to those of the neat polymers, thereby indicating very weak interactions between the blend components. On the basis of various findings during the rheological investigation, the blend under study is classified almost immiscible. Moreover, the obtained results also suggested that the miscibility depends on the blend composition and frequency.
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Acknowledgments
Financial support from Higher Education Commission (HEC) Islamabad is highly appreciated by Zafarullah Khan Marwat. The author is particularly grateful to his parent department, Higher Education Department (HED) Khyber Pakhtunkhwa, Peshawar, for grant of study leave. Without their cooperation, this work would have not been completed smoothly.
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Marwat, Z.K., Baloch, M.K. Correlation Between Miscibility and Rheological Characteristics of the Polystyrene (PS) and Poly(styrene-co-acrylonitrile) (PSAN) Blends. Int J Thermophys 37, 113 (2016). https://doi.org/10.1007/s10765-016-2111-8
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DOI: https://doi.org/10.1007/s10765-016-2111-8