Influence of the reticulation structure on the coefficiency of Flory interaction in polybutadiene/toluene system
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...
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| Autores principales: | , , |
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| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02556952_v30_n1_p67_Marzocca |
| Aporte de: |
| Sumario: | 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. © 2010 Universidad Simón Bolívar (Venezuela). |
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