Abstract
A natural rubber (NR) with a conventional sulfur cure system and a ratio of sulfur/accelerator (V) equal to 3 was investigated. The network structure of the NR during vulcanization was analyzed using a model of rubber elasticity based on the tube concept, which was applied to the treatment of the stress-strain measurements. The influence of cure time and temperature on the chemical crosslinks density was ana- lyzed. The values were compared with those obtained by means of an equilibrium volume swelling measurement. The differences between samples of NR cured with V5 3 and 1.5 were analyzed. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2747-2755, 1999
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