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Sadasivuni, K. K., Saiter, A., Gautier, N., Thomas, S. & Grohens, Y. (2013) Effect of molecular interactions on the performance of poly(isobutylene-co-isoprene)/graphene and clay nanocomposites. Colloid Polym. Sci. 291 1729–1740. 
Added by: Laurent Cournède (2016-03-10 21:23:30)
Type de référence: Article
DOI: 10.1007/s00396-013-2908-y
Numéro d'identification (ISBN etc.): 0303-402X
Clé BibTeX: Sadasivuni2013
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Catégories: IMN
Mots-clés: chlorobutyl rubber, Composites, Elastomer nanocomposites, functionalized graphene, gas barrier properties, interfaces, Maleic anhydride grafting, mechanical-properties, natural-rubber nanocomposites, nitrile rubber, Nonlinear behavior, Payne effect, polymer/layered silicate nanocomposites, rubber/organoclay nanocomposites, Stress relaxation, stress-relaxation
Créateurs: Gautier, Grohens, Sadasivuni, Saiter, Thomas
Collection: Colloid Polym. Sci.
Consultations : 3/476
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Poly(isobutylene-co-isoprene) (IIR)/graphene and cloisite10A nanocomposites were prepared successfully and the resulting mechanical, rheological and barrier properties were carefully evaluated and compared. Chemical treatments like maleic anhydride grafting were used to improve the dispersion of the clay in the IIR matrix. Blends with different loading (20, 40, 60, and 80 \%) of maleic anhydride grafted poly(isobutylene-co-isoprene) (MA-g-IIR) and IIR were made to maintain a balance between the beneficial polarity induced by MA grafting and the inevitable decrease in molecular weight (due to chain scission) induced by the free radical grafting process. The highest moduli, tensile strength and elongation at break were achieved in the case of a 60:40 ratio of MA-g-IIR (grafting degree 0.75)/IIR mixture with 5 phr of cloisite 10A. IIR/graphene nanocomposites exhibited higher reinforcement (Young's moduli) and lower gas permeability compared to the optimized clay nanocomposites with same weight percentage. The filler-elastomer and filler-filler interactions deduced from rheology, stress relaxation and Payne effect experiments emphasize the reinforcing ability in IIR/graphene and MA-g-IIR/clay. XRD, SEM and TEM results further substantiated the results from the obtained micro structure of the nanocomposites. The improved performances of IIR/MA-g-IIR/clay and IIR/graphene were successfully correlated with interactions between the filler platelets and elastomer chains occurring in the nanocomposites.
Added by: Laurent Cournède  
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