Rheology of PVC. Part 5 : melt elasticity

DOI	Resolve DOI: https://doi.org/10.1002/vnl.730080405
Author	Search for: Utracki, L. A.¹
Affiliation	National Research Council Canada
Format	Text, Article
Abstract	The behavior of PVC changes drastically with the temperature and the method of sample preparation. In the steady‐state shear mode, upon a decrease of the rate of deformation, the data may show either a steady increase of the shear viscosity or a leveling off to a Newtonian plateau. In the dynamic test mode, both the storage modulus, G′, and the loss modulus, G″, show an effect of the yield stress. Only at temperatures above 210°C are flow curves normal for polymer melts obtained. Rigid and nonrigid PVC formulations have been tested in Weissenberg Rheogoniometer, using steady‐state or dynamic test modes at temperatures from 140 to 220°C. It was observed that yield affects elasticity more (measured by the first normal stress difference or the storage modulus) than viscosity (expressed by the shear stress or the loss modulus). The corrected for yield plots of elastic vs. viscous parameter can be easily interpreted in terms of a composite flow.
Publication date	1986-12
Publisher	Wiley
In	Journal of Vinyl and Additive Technology 8, no. 4: 156–159.
Language	English
Peer reviewed	Yes
NRC number	CNRC 25399 NRC-IGM86-502-270
NPARC number	23004045
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Record identifier	32cd4a61-9a0d-4ef0-8387-14a119bbbb64
Record created	2018-09-19
Record modified	2020-03-17