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Mixing of rubber and viscoelasticity—III. Viscoelastic characterization of gum rubber
Author(s) -
Nakajima N.
Publication year - 1995
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1995.210360201
Subject(s) - viscoelasticity , characterization (materials science) , natural rubber , materials science , mixing (physics) , rheology , linearization , polymer science , composite material , deformation (meteorology) , nonlinear system , nanotechnology , physics , quantum mechanics
This paper is the third in a series where the author attempts to provide scientific interpretation for mixing of rubber. Each gum rubber exhibits its own characterstic behavior during mixing. In the previous paper, the behavior was identified with viscoelastic properties and failure. This paper describes characterization of gum rubbers based on viscoelastic properties. Methods of describing deformation are discussed with a proposal to use material functions for the present purpose. Non‐linear viscoelasticity is discussed with a proposal to use a particular linearization scheme. The conventional characterization methods are discussed concerning the limitations and shortcomings of dilute solution methods and the Mooney index. The linearization scheme is applied as the characterization method most suitable for gum rubbers. A number of examples are given to demonstrate the effectiveness of this characterization method in relating the results to molecular architecture. Finally, the discussion covers processability of gum rubbers and their molecular structure.