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An extraction kinetics method to study the morphology of carbon black filled rubber compounds
Author(s) -
Leblanc J. L.,
Stragliati B.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970222)63:8<959::aid-app1>3.0.co;2-r
Subject(s) - natural rubber , carbon black , extraction (chemistry) , kinetics , compounding , mixing (physics) , dispersity , butyl rubber , fraction (chemistry) , macromolecule , materials science , chemical engineering , activation energy , chemistry , polymer science , chromatography , polymer chemistry , composite material , organic chemistry , physics , biochemistry , quantum mechanics , engineering
A method was developed to investigate the kinetics of extraction of the unbound fraction of rubber compounds and to assess the macromolecular characteristics of extracted species. The results obtained show that the extraction kinetics can be modeled with a simple law. For full compounds a correction for nonrubber extractable ingredients must be applied; but it is demonstrated that compounding ingredients do not affect the bound rubber level of a given formulation, providing that the optimum mixing energy level has been achieved during the preparation procedure and that the compound maturation processes have been completed. Macromolecular characteristics of labile rubber species were analyzed versus extraction; and a simple equation, implicitly referring to a Fickean process, is offered to model the observed effects. It is so demonstrated that the polydispersity of labile species varies during the extraction process and that the largest molecular weight fractions are involved in the rubber‐filler interaction, as predicted by theory. Experiments on model compounds allow the effect of both the mixing energy and storage maturation to be studied in detail, and a model that takes both effects into account was developed. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 959–970, 1997