Structure and Properties of Reactive Silica Grafted Emulsion Polymerized Styrene‐Butadiene Rubber Nanocomposites
Source abstract
Abstract
ABSTRACT The dispersion of silica and its interfacial interaction with styrene butadiene rubber (SBR) can be strongly improved using silane coupling agents. In this study, the reactive silica (r‐SiO 2 ) particles were synthesized via hydrolysis and condensation reactions between siloxanes and hydroxyl groups. Subsequently, the r‐SiO 2 /emulsion styrene‐butadiene rubber (ESBR) nanocomposites were prepared. The effect of various reaction conditions on the grafted content of silane was investigated, and how different r‐SiO 2 amounts influence the structure, morphology, and performance of r‐SiO 2 /ESBR nanocomposites was discussed. The optimum reaction conditions were determined using 3‐(methylacryloxyl)propyltrimethoxy silane (KH‐570) as a modifier, and ethylene glycol butyl ether acetate (EBA) as the solvent. Under these conditions, when the amount of r‐SiO 2 was 30 phr, the bound rubber content of SBR‐r‐SiO 2 reached 78.0%. The tensile strength and the tear strength were 11.09 and 97.90 MPa, which increased by 2.64 and 6.53 times compared to the raw rubber. Moreover, the vulcanized rubber nanocomposites exhibited significantly improved dynamic mechanical properties. Scanning Electron Microscope (SEM) analysis further revealed that the compatibility between SiO 2 and rubber was greatly enhanced after modification.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Polymer Nanocomposites and Properties · Silicone and Siloxane Chemistry · Polymer composites and self-healing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Xi'an Key Laboratory of Functional Organic Porous Materials, School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Shaanxi Province
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