Synthesis and characterization of in situ sodium‐activated and organomodified bentonite clay/styrene–butadiene rubber nanocomposites by a latex blending technique

Abstract

In this article, we describe a method used to prepare an in situ sodium-activated, organomodified bentonite clay/styrene-butadiene rubber nanocomposite master batch via a latex blending technique. The clay master batch was used for compound formulation. Octadecyl amine was used as an organic intercalate. The clay was purchased from local suppliers and was very cheap. Sodium chloride was used for in situ activation of the clay. The wide-angle X-ray diffraction data indicated that the in situ sodium activation helped to increase the intergallery distance from 1.28 to 1.88 nm. A transmission electron micrograph indicated intercalation and partial exfoliation.The thermal properties were relatively better in the case of the sodium-activated, organomodified bentonite-clay-containing compound. A substantial improvement in physical properties such as the modulus, tensile strength, tear strength, and elongation at break was observed in the case of the in situ sodium-activated compound. A cationexchange capacity equivalent (of the clay) of 1.5 times the octadecyl amine was the optimum dose for the modification.

Effect of treatment of Bis(3‐triethoxysilyl propyl)tetrasulfane on physical property of in situ sodium activated and organomodified bentonite clay – SBR rubber nanocomposite

“…21 About 10 g of the unfractionated pristine bentonite clay was dispersed in 500 mL of distilled water using a Remi (India) stirrer for 1 h at 2000-3000 rpm. The temperature was maintained to around 80 C. Next sodium chloride (10% with respect to clay) was added to the hot clay slurry.…”

“…20 It is reported that at equivalent carbon black loading, the set property of the nanocomposites are inferior. 18 Author's previous publication 21 deals with a novel single step method to form in situ sodium activation and organo modified bentonite clay -SBR rubber nanocomposites. In this study, effect of silane treatment on the physical property of in situ sodium activation and organo modified bentonite clay -SBR rubber nanocomposites has been evaluated.…”

The combination of montmorillonite and silica in styrene–butadiene rubber/polybutadiene rubber tread compounds

“…Generally, melt mixing was not able to realize this goal. Many research groups had reported their methods for preparing intercalation/exfoliation structure . In our previous study, new solutions and ultrasonication were introduced in the latex compounding process to improve the mix efficiency.…”

Styrene–butadiene rubber/cellulose II/clay nanocomposites prepared by cocoagulation—mechanical properties

“…Rubber nanocomposites containing layered silicates (LS) as reinforcement have drawn the attention of researchers due to advantages that nanocomposites have over conventional composites. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] The interest behind this development is placed on the nanoscale dispersion (the thickness of LS is ca. 1nm) and the very high-aspect ratio of the silicate platelets (length-to-thickness ratio up to 2000), which enable a high-reinforcing efficiency even at low-LS loading.…”

“…7,10,12,[14][15][16][17][18][19] The possibility to obtain elastomeric nanostructured systems by introducing modified LS in different types of elastomers has been investigated as well. [3][4][5][6]8,11 U.S. patent (065266,2005) 11 reports the preparation of nanocomposites comprised of water sellable clay particles in aqueous emulsions such as styrene butadiene rubber (SBR) or NR containing a novel amine to aid in the intercalation and partial exfoliation of the clay particles. The applications of such rubber nanocomposites are contemplated, for example, as aircraft tire tread, where a significant replacement of CB reinforcement is desired to reduce heat buildup for tire durability and to reduce tire weight for fuel economy.…”