scholarly journals Gas Barrier, Rheological and Mechanical Properties of Immiscible Natural Rubber/Acrylonitrile Butadiene Rubber/Organoclay (NR/NBR/Organoclay) Blend Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2654 ◽  
Author(s):  
Hanna J. Maria ◽  
Martin George Thomas ◽  
Marco Morreale ◽  
Francesco Paolo La Mantia ◽  
Ange Nzihou ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Gas Permeability ◽  
Barrier Properties ◽  
Filler Loading ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Acrylonitrile Butadiene Rubber ◽  
Blend Composition ◽  
Rubber Component ◽  
Permeability Studies

In this paper, gas permeability studies were performed on materials based on natural rubber/acrylonitrile butadiene rubber blends and nanoclay incorporated blend systems. The properties of natural rubber (NR)/nitrile rubber (NBR)/nanoclay nanocomposites, with a particular focus on gas permeability, are presented. The measurements of the barrier properties were assessed using two different gases—O2 and CO2—by taking in account the blend composition, the filler loading and the nature of the gas molecules. The obtained data showed that the permeability of gas transport was strongly affected by: (i) the blend composition—it was observed that the increase in acrylonitrile butadiene rubber component considerably decreased the permeability; (ii) the nature of the gas—the permeation of CO2 was higher than O2; (iii) the nanoclay loading—it was found that the permeability decreased with the incorporation of nanoclay. The localization of nanoclay in the blend system also played a major role in determining the gas permeability. The permeability of the systems was correlated with blend morphology and dispersion of the nanoclay platelets in the polymer blend.

scholarly journals Properties of rice husk ssh silica filled natural rubber and acrylonitrile-butadiene rubber blends

2022 ◽  
Vol 17 (1) ◽  
pp. 1
Author(s):  
H. G. I. M. Wijesinghe ◽  
T. N. B. Etampawala ◽  
D. G. Edirisinghe ◽  
G. R. V. S. Gamlath ◽  
R. R. W. M. U. G. K. Wadugodapitiya ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Rice Husk ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Acrylonitrile Butadiene Rubber

Alpha (Vitrea) Transition in Vulcanized Natural Rubber/Styrene Butadiene Rubber Blends Prepared by Mechanical and Solution Mixing

2012 ◽  
Vol 184 ◽  
pp. 405-410 ◽  
Author(s):  
M. A. Mansilla ◽  
A.A. Ghilarducchi ◽  
H.R. Salva ◽  
A. J. Marzocca
Keyword(s):  
Natural Rubber ◽  
Preparation Method ◽  
Dynamic Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Preparation Methods ◽  
Rubber Blends ◽  
Blend Composition ◽  
Rouse Theory ◽  
Styrene Butadiene

The preparation method of an elastomeric blend can influence the mechanical properties of the vulcanized compound. In this research elastomeric blends composed by natural rubber and styrene butadiene rubber were mixed using two different methods: by mixing in a roll mill and by dissolution of both elastomers in toluene, mixing of both solutions with the curatives and the evaporation of the solvent. Samples with different Natural Rubber/Styrene Butadiene Rubber relation were prepared by both methods and vulcanized at 433K with a system based on sulphur and accelerator (N-t-butyl-2-benzothiazole sulfenamide) up to the time of optimum cure. The blend composition and the preparation methods have a strong influence in the mechanical dynamic properties. Scanning Electron Microscopy observations indicate that, in the blends prepared by the dissolution method, the samples show better miscibility of the constitutive phases than those prepared by the roll milling method. The temperature dependence of the internal friction was studied for each sample using a subresonant forced pendulum at 1 Hz between 190K and 250K. Depending on the blend composition, one or two glass transition temperatures (Tg) associated to the α-relaxation were measured. In the last case each Tgcorresponds to each elastomeric phase of the compound. The loss tangent data for each compound was analyzed using a mixture law of two phases in the frame of the Rouse theory. The adjustment of the data to the proposed model was very good for both preparation method and the whole composition range of the compounds. Then it was possible to obtain the Tg, the main relaxation time and the activation energy values of each compound and, in some samples, the respective values for each elastomeric phase.

scholarly journals ENR-50 Compatibilized Natural Rubber/Recycled Acrylonitrile-Butadiene Rubber Blends

2015 ◽  
Vol 44 (6) ◽  
pp. 835-842 ◽  
Author(s):  
Hazwani Syaza Ahmad ◽  
Hanafi Ismail ◽  
Azura Abd. Rashid
Keyword(s):  
Natural Rubber ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Acrylonitrile Butadiene Rubber
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