Resumen

MARZOCCA, Angel J; GOYANES, Silvia  y  RODRIGUEZ GARRAZA, Ana L. Influencia de la estructura de reticulación en el coeficiente de interacción de Flory en el sistema polibutadieno/tolueno. Rev. LatinAm. Metal. Mater. [online]. 2010, vol.30, n.1, pp.67-72. ISSN 0255-6952.

Samples of cured medium cis polybutadiene compound, formulated with sulphur and accelerator and vulcanized at 433 K, were prepared at different cure times in order to obtain different network structures. Uniaxial stress strain tests were performed at room temperature and analyzed in the frame of the tube model and the molecular weight between crosslinks was obtained. Swelling tests in toluene at room temperature were made in the same samples and the volume fraction of rubber was calculated in each case. By means of the Flory-Rehner relationship and using the molecular weight between crosslinks, the Flory’s parameter χ was estimated for the polybutadiene/toluene system.

Palabras clave : Polybutadiene rubber; vulcanization; swelling; toluene.