Effect of organoclay on the solvent diffusion behavior and mechanical properties of natural rubber nanocomposites

Abstract

This article aims to investigate the structure-property relationship of organoclay filled natural rubber (NR) nanocomposites. The nanostructure has been investigated by X-ray diffraction, atomic force microscopy and transmission electron microscopy. The effect of organoclay on the diffusion behavior and mechanical properties of natural rubber has been investigated. The solvent transport properties and the swelling characteristics of the nanocomposites have been studied using toluene and hexane as solvents. It is observed that the nanocomposites exhibit an anomalous trend of transport behavior. The diffusion coefficient and permeability coefficient values are found to be lower for hexane than for toluene. The nanocomposites exhibit improved mechanical properties (tensile strength, tear strength, and modulus) and hardness compared to the unfilled rubber. It is concluded that the dispersion of organoclay has a significant effect on the diffusion and mechanical properties of the nanocomposites. POLYM.

Toward Mechanically Robust Crosslinked Elastomers through Phase Transfer Agent Tuning the Solubility of Zn2+ in the Organic Phase

“…To highlight the importance of phase transfer agent to properties of crosslinked elastomers, we compare tensile strength, tear strength, and elongation at break among this work and the elastomers with different accelerators in Figure 4 c,d. The data of elastomers with different accelerators are from the previous works, containing N-cyclohexyl-2-benzothiazolesulfenamide (CZ) [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ], diphenyl guanidine (D) [ 49 , 50 ], dibenzothiazyl disulfide (DM) [ 51 , 52 , 53 , 54 , 55 , 56 , 57 ], 2-mercaptobenzothiazole (M) [ 2 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ], N-tert-butylbenzothiazole-2-sulphenamide (NS) [ 30 , 66 , 67 , 68 , 69 , 70 , 71 ], and tetra methyl thiuram disulfide (TMTD) [ 30...…”

Crosslinking behavior and enhanced mechanical properties of acrylonitrile‐butadiene rubber composites by incorporating aluminum ammonium sulfate particles

“…Figure illustrates the crack propagation under mechanical loads. For coordination system, particles are worked both as coordination agent and reinforcement fillers that a well‐bonded interface adhesion induced by coordination can prevent from crack propagation . Notably, coordination bonds can break and reattach during mechanical loading that benefit for energy dissipation and chain orientation of NBR, and then the stress concentration will be reduced to inhibit fracture .…”

“…For coordination system, particles are worked both as coordination agent and reinforcement fillers that a well-bonded interface adhesion induced by coordination can prevent from crack propagation. 31 Notably, coordination bonds can break and reattach during mechanical loading that benefit for energy dissipation and chain orientation of NBR, and then the stress concentration will be reduced to inhibit fracture. 28,32 As for NBR/S system, however, the chain motion is limited by the covalent crosslinking bonds, thus stress concentration increases, leading to the broken of network chains and new free surface area.…”

The impact of organo‐montmorillonite on rheology and crystalline structure of uncured and cured acrylonitrile‐butadiene rubber/poly(ethylene‐co‐vinyl acetate) nanocomposites

“…The preparation and properties of organo‐montmorillonite (OMMT)‐based polymer nanocomposites have been the center of numerous investigations and analyses in recent decades. A large group of polymers with various chain structures, degree of stiffness, and polarity and also their blends have been examined as the matrix/matrices to accommodate the clay platelets such as polypropylene, [ 1‐4 ] nylon 6 [ 5‐11 ] and 12, [ 12‐14 ] natural rubber, [ 15‐17 ] styrene‐butadiene rubber, [ 18‐20 ] poly(lactic acid), [ 21‐24 ] poly(butylene terephthalate), [ 25‐27 ] polystyrene, [ 28‐30 ] epoxy resin, [ 31‐34 ] silicone rubber, [ 35‐37 ] unsaturated polyester resin, [ 38‐41 ] polysulfone, [42‐45] and polyimide. [46‐49] The nanocomposites usually render lower thermal expansion coefficient, gas permeability, and solvent absorption and also higher thermal and mechanical properties and heat distortion temperature than those of their pristine polymers.…”