ISSN:
1435-1528
Keywords:
Polystyrene melt
;
shear viscosity
;
second-Newtonian viscosity
;
Cross model
;
Carreau model
;
Cox-Merz relation
;
recoverable compliance
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Abstract Based upon a compilation of steady-shear and dynamic-shear viscosity data from the literature for polystyrene melts, an assessment has been made concerning the relative merits of the Cross and Carreau models in describing the shear-rate dependence of such viscosities. It is shown that the Cross model is decidedly more appropriate for PS of BMWD. Based upon master plots, it is demonstrated that the Cox-Merz relation applies to PS of both BMWD and NMWD. It is also shown that the Cox-Merz relation applies even into the second-Newtonian regime, withη ∞ being independent ofM w and MWD. In addition, the applicability of the Prest-Porter-O'Reilly relationship between shear viscosity and recoverable shear compliance is corroborated in the case of PS of NMWD.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01329342
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