What is it about?
Polycarbonate squeeze flow combines both shear and extension characteristics, and exhibits nonlinear some properties. It is necessary to investigate its rheological characteristics so as to describe squeeze flow accurately.
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Why is it important?
To avoid the difficult of measuring the inner melt rheological behavior directly, we presents a method to meaure the compressing force applied on the upper disc instead. Then explore the relationship between the force and polycarbonate rheology through solving the governing equations and constitutive equations by finite difference method.
Perspectives
This study shows that the compressing force exihibits ‘steep—steady—steep—steady’ evolution pattern, and only viscoelastic models can simulate the steep increase and decrease of the compressing force correctly.
Professor Wei Cao
Zhengzhou University
Read the Original
This page is a summary of: Evaluation of typical rheological models fitting for polycarbonate squeeze flow, Journal of Applied Polymer Science, April 2015, Wiley,
DOI: 10.1002/app.42279.
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