Properties of Virgin Poly(Vinylchloride)/Acrylonitrile Butadiene Rubber (PVCv/NBR) and Waste Poly(Vinylchloride)/Acrylonitrile Butadiene Rubber (PVCw/NBR) Blends: The Effect of Blend Composition and Dynamic Vulcanization

2004 ◽  
Vol 43 (3) ◽  
pp. 695-711 ◽  
Author(s):  
H. Ismail ◽  
Supri ◽  
A. M. M. Yusof
Keyword(s):  
Butadiene Rubber ◽  
Dynamic Vulcanization ◽  
Acrylonitrile Butadiene Rubber ◽  
Blend Composition

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.

Blends of Nylon 6/66 and Acrylonitrile-Butadiene Rubber: Effects of Blend Ratio and Dynamic Vulcanization on Morphology and Properties

2005 ◽  
Vol 21 (4) ◽  
pp. 277-297 ◽  
Author(s):  
C. Radhesh Kumar ◽  
I. Aravind ◽  
R. Stephan ◽  
Peter Koshy ◽  
J. Jose ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Butadiene Rubber ◽  
Dynamic Vulcanization ◽  
Blend Ratio ◽  
Acrylonitrile Butadiene Rubber ◽  
Electron Microscopies ◽  
Blend Morphology ◽  
Transmission Electron ◽  
The Stability ◽  
Morphology And Mechanical Properties

The morphology and mechanical properties of nylon (copolyamide 6/66)/ acrylonitrile-butadiene rubber (NBR) blends have been studied with special reference to the effect of blend ratio and crosslinking systems. Morphological investigations of the blends using scanning and transmission electron microscopies show that a uniform and finer dispersion of the elastomer phase is achieved by dynamic crosslinking. The effects of various crosslinking systems such as sulphur and dicumyl peroxide on the morphology and mechanical properties of these blends were analysed. Morphological stability of the blends upon annealing has been investigated and the mechanical properties of the blends have been discussed. Attempts have been made to correlate the morphology with the mechanical properties of the dynamically vulcanized blends. The stability of the blend morphology during annealing has been examined.

scholarly journals Thermoplastic Dynamic Vulcanizates with In Situ Synthesized Segmented Polyurethane Matrix

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1663 ◽  
Author(s):  
Andrea Kohári ◽  
István Zoltán Halász ◽  
Tamás Bárány
Keyword(s):  
Mechanical Properties ◽  
Butadiene Rubber ◽  
Scanning Calorimetry ◽  
Dynamic Vulcanization ◽  
Sem Images ◽  
Acrylonitrile Butadiene Rubber ◽  
Atomic Force ◽  
Rubber Particles ◽  
Rubber Phase

The aim of this paper was the detailed investigation of the properties of one-shot bulk polymerized thermoplastic polyurethanes (TPUs) produced with different processing temperatures and the properties of thermoplastic dynamic vulcanizates (TDVs) made by utilizing such in situ synthetized TPUs as their matrix polymer. We combined TPUs and conventional crosslinked rubbers in order to create TDVs by dynamic vulcanization in an internal mixer. The rubber phase was based on three different rubber types: acrylonitrile butadiene rubber (NBR), carboxylated acrylonitrile butadiene rubber (XNBR), and epoxidized natural rubber (ENR). Our goal was to investigate the effect of different processing conditions and material combinations on the properties of the resulting TDVs with the opportunity of improving the interfacial connection between the two phases by chemically bonding the crosslinked rubber phase to the TPU matrix. Therefore, the matrix TPU was synthesized in situ during compounding from diisocyanate, diol, and polyol in parallel with the dynamic vulcanization of the rubber mixture. The mechanical properties were examined by tensile and dynamical mechanical analysis (DMTA) tests. The morphology of the resulting TDVs was studied by atomic force microscopy (AFM) and scanning electron microscopy (SEM) and the thermal properties by differential scanning calorimetry (DSC). Based on these results, the initial temperature of 125 °C is the most suitable for the production of TDVs. Based on the atomic force micrographs, it can be assumed that phase separation occurred in the TPU matrix and we managed to evenly distribute the rubber phase in the TDVs. However, based on the SEM images, these dispersed rubber particles tended to agglomerate and form a quasi-continuous secondary phase where rubber particles were held together by secondary forces (dipole–dipole and hydrogen bonding) and can be broken up reversibly by heat and/or shear. In terms of mechanical properties, the TDVs we produced are on a par with commercially available TDVs with similar hardness.

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