Studies on novel dual filler based epoxidized natural rubber nanocomposite

Abstract

Carbon black (N‐330), organically modified nanoclay (NC) based ternary, particulate nanocomposites comprising of epoxidized natural rubber matrix having 25 mol% of epoxy group (ENR‐25) were prepared in an open two‐roll mill. Investigations of cure characteristics, dynamic mechanical, tensile, thermal, and morphological characteristics were conducted using Rheometric analysis, Dynamic Mechanical Analysis (DMA), mechanical property evaluation, Thermo‐gravimetric analysis (TGA), High Resolution Transmission Electron Microscopy (HR‐TEM), respectively, to derive the interrelation among the developed nanostructures inside the composite, crosslinking density, performance properties obtained there from. A satisfactory level of correlation was obtained among various results, which indicated the formation of “nanounit” comprising of N‐330 and NC inside ENR‐25 matrix. To optimize the nanostructures, ENR based compounds containing various combinations of NC and N‐330 was prepared. Thorough and systematic structure‐property analyses were performed on those composites. Optimum stoichiometric combination of N‐330 and NC inside the ENR‐25 matrix was derived (ratio of N‐330 and nanoclay in wt% = 20:15), which showed synergistic effect of one filler upon another that was ultimately reflected in their dynamic mechanical and tensile properties. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers

Evaluation of microstructure of natural rubber/nano-calcium carbonate nanocomposites by solvent transport properties

“…This reduction in elasticity of nanocomposite is due to the agglomeration effects of CaCO 3 . 41 The same trend was observed in the swelling properties of nanocomposites.…”

Use of TBzTD as Noncarcinogenic Accelerator for ENR/SiO2 Nanocomposites: Cured Characteristics, Mechanical Properties, Thermal Behaviors, and Oil Resistance

“…As a consequence, ENR would have oil and oxidation resistance comparable to some of the synthetic rubbers, depending on the extent of epoxidation (mol% epoxidation) [5,9,10,12]. It has been reported that ENR with 50 mol% epoxidation exhibits oil resistance similar to that of medium-acrylonitrile-content nitrile rubber and superior to that of chloroprene rubber [9,12,19]. As the level of epoxidation increases more than 50 mol%, the ENR products become harder and of less resilience and elasticity at room temperature (RT), whereas the products of lower epoxide content are typical elastomers with less oil resistance [8,10,17].…”

“…With this respect, the TBzTD, a fast curing accelerator with no secondary amine, has been developed to replace the TMTD, resulting in the nitrosamine free cure. Recently, reinforcement of rubbers with inorganic nanoparticles, even at a very low loading, can significantly improve their mechanical and thermal properties [9,10,19,[21][22][23][24][25]. To achieve the desired properties, the nanofillers must sufficiently disperse in the rubber matrix, as poor dispersion leads to the obvious decrease in the performance properties of the nanocomposites.…”

One-Step in Situ Modification of Halloysite Nanotubes: Augmentation in Polymer–Filler Interface Adhesion in Nanocomposites

“…All the nanocomposites showed higher E' value over the neat C60E40 blend at the rubbery plateau as can be realized from the data of Table 4. This observation can be ascribed to the reinforcement mechanism of fillers, as these fillers have a larger effect in raising the modulus above T g 34,41 . Besides, the nanocomposites underwent lesser drop in the storage modulus in comparison to the neat blend on passing across the glass-rubber transition temperature and the trend is in the follows order: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 19…”