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A study of the flow properties of rubbers using the rheometrics mechanical spectrometer
Author(s) -
Mukherjee Debi P.
Publication year - 1977
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760171105
Subject(s) - rheometry , shear rate , materials science , rheology , composite material , viscosity , capillary action , natural rubber , apparent viscosity , shear (geology) , shear modulus , shear flow , viscometer , thermodynamics , physics
The dynamic shear properties of a natural rubber and several commercial synthetic polyisoprenes were measured in a Rheometrics mechanical spectrometer. The dynamic viscosity vs angular velocity curve was fitted to the three‐constant Car, reau model. The rheological parameters were correlated with molecular characteristics such as gel content and weight average molecular weight. The viscosity measurements at high shear rate were obtained from capillary rheometry. The viscosity vs shear rate curve at the low shear rate end was found to be superimposible on the plot of dynamic shear viscosity vs twice the angular velocity.