Magadiite/styrene‐butadiene rubber composites for tire tread applications: Effects of varying layer spacing and alternate inorganic fillers

Abstract

Magadiite (MGD), a synthetic layered silicate (Na 2 Si 14 O 29 Á9H 2 O) with surface chemistry similar to precipitated silica, was cation-exchanged with three different organic cations to explore the effect of varying MGD layer spacing on the mechanical properties of MGD-based styrene-butadiene rubber (SBR) composites. This work also compares the mechanical properties of MGD/SBR composites with those formulated with montmorillonite (MMT) and precipitated silica. Dodecylpyridinium (DP 1 ) produces greater expansion of MGD layers than cetyltrimethylammonium (CTA 1 ); the resulting DP-MGD/SBR composites have greater yield strain, toughness, and rubbery storage modulus than comparable CTA-MGD/SBR composites. MGD treated with hexadecylammonium (HDA 1 ) has the greatest layer spacing, but the HDA-MGD layers collapse upon melt-blending with SBR. CTA-treated MMT (CMMT) exfoliates in aqueous suspension, but the platelets re-stack upon drying and during melt-blending with SBR. The presence of exfoliated and/or disordered platelet stacks in CMMT/SBR probably accounts for its higher tensile and dynamic moduli compared to MGD-and silica-based SBR composites. Dynamic mechanical properties are used to predict tire tread performance metrics for these composites.

Synthesis of metal-doped nanoplastics and their utility to investigate fate and behaviour in complex environmental systems

“…Given the now proven stability of Pd into the core, other types of polymers could be grown on this base particle structure for other composite nanoplastic variants. There are several different monomers used in free radical polymerization, which are also of environmental interest, which could alternatively be added as a shell material in this system, namely, poly(styrene-butadiene) rubber (SBR) used in car tires and modified asphalt32–34, polyvinylchloride (PVC) used in electrical cables,35 construction or clothing,36 and poly(styrene-acrylonitrile) (SAN) which is commonly used for kitchen utensils 37. By synthesizing these materials in nanoplastic form, this could mimic the breakdown products of larger plastic items.…”

Adsorption Process and Properties Analyses of a Pure Magadiite and a Modified Magadiite on Rhodamine-B from an Aqueous Solution

“…There are so many hydrated sodium ions between the plates that the cationexchange capacity (CEC) is higher than other silicates, such as montmorillonite and can reach up to 2.22 meq/g [8], which was determined from the ideal formulation of MAG (Na2Si14O29). So far, the cation-exchange properties of MAG investigated [9][10][11][12][13], indicate that MAG can be used as an adsorbent, based on cation exchange [14,15]. According to the current study, MAG can be synthesized [16][17][18][19][20][21]; the laminate of MAG was composed of SiO4 and has no other impurities.…”

Styrene-Based Elastomer Composites with Functionalized Graphene Oxide and Silica Nanofiber Fillers: Mechanical and Thermal Conductivity Properties

“…Composite elastomers are a very significant category of polymeric materials with numerous applications such as tire manufacturing, high-performance elastomers, gas barrier materials and advanced binders for energy storage devices [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. The incorporation of filler material in the elastomer matrix can provide significant reinforcement [ 8 , 9 ] and impart new properties to the elastomer such as thermal and electrical conductivity [ 10 , 11 , 12 , 13 ].…”