Abstract
The influence of temperature and mass fraction of Pluonic F127 on the rheological properties of polyvinyl butyric (PVB)/Pluronic F127/polyethylene glycol (PEG) 200 blend systems was investigated by a rotational rheometer with parallel plates. The results show that the blend systems approach homogeneous state at 140, 150 and 160 °C while the rheological properties of the blend systems significantly deviate from the homogeneous systems at 120 °C. Shear thinning behavior is observed for all the blend systems at different temperatures and is enhanced by increasing Pluronic F127 content. The complex viscosity, storage modulus, loss modulus, zero-shear activation energy and flow recovery of the blend systems increase with the increase of Pluronic F127 content. There is a crossing point for the loss modulus and the storage modulus of each sample at high frequency, which is called specified frequency (SF). The loss modulus is larger than the storage modulus when the frequency is less than the SF, and when frequency is more than SF, the loss modulus is smaller than the storage modulus.
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Foundation item: Project(20776161) supported by the National Natural Science Foundation of China
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Ouyang, W., Qiu, Yr. Rheological properties of polyvinyl butyral/Pluronic F127/PEG200 blend systems. J. Cent. South Univ. Technol. 18, 1891–1896 (2011). https://doi.org/10.1007/s11771-011-0919-8
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DOI: https://doi.org/10.1007/s11771-011-0919-8