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Study on Rheological Properties of Polyethylene Terephthalate

NIU Ming jun, CHEN Jin zhou, LI Xin fa, WANG Li suo, XIONG Hua qing (Department of Materials Engineering, Zhengzhou University, Zhengzhou 450052)  
Polyethylene terephthalate is a very useful commercial plastic. A XLY 2 type capillary rheometer was used to obtain shear stress, shear rate, melt viscosity, non Newton index (n) and the activation energy for viscous flow (Δ E ). The experimental results show that the melt apparent viscosity of PET decreases with the increasing of temperature, and the activation energy for viscous flow (Δ E ) decreases with the increasing of shear stress and shear rate. At the experiment temperature, the melt viscosity decreases with the increasing of shear stress and shear rate, and the value of n is less than 1, which indicates that the melt PET is pseudoplastic.
【CateGory Index】: O633.14
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