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Analysis of the variation of molecular parameters of NR during vulcanization in the frame of the conformational tube model
Author(s) -
Marzocca Angel José,
Cerveny Silvina,
Raimondo Roxana 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(19971107)66:6<1085::aid-app9>3.0.co;2-e
Subject(s) - vulcanization , natural rubber , swelling , materials science , rubber elasticity , thermodynamics , elasticity (physics) , polymer chemistry , tube (container) , polymer science , composite material , physics
The network structure of natural rubber (NR) achieved during vulcanization was analyzed using the model of rubber elasticity based on the tube concept, applied to the treatment of the stress‐strain measurements. This theory allows the separation of constraint and crosslink contributions. Also, network parameters can be calculated. The crosslink level of the material was changed using different times and temperatures of cure. The change in the molecular parameters of the model with the degree of cure was estimated. The present research is useful for the precise determination of the chemical crosslink density of the NR network. The values were compared with those obtained by means of equilibrium volume swelling measurement. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1085–1092, 1997