We synthesized poly((furfuryl methacrylate)-co-(2-(dimethylamino)ethyl methacrylate)) (p(FMA-co-DMAEMA)) for the dispersion of single-walled carbon nanotubes (SWCNTs) while maintaining their high aspect ratios. The nanotubes' length and height were 2.0 μm and 2 nm, as determined by transmission electron microscopy and atomic force microscopy, respectively. Transparent conductive films (TCFs) were fabricated by individually dispersed long SWCNTs onto a flexible polyethylene terephthalate substrate. The sheet resistance (Rs) was 210 Ω □(-1) with 81% transmittance at a wavelength of 550 nm. To reduce their Rs, the TCFs were treated with HNO3 and SOCl2. After treatment, the TCFs had an Rs of 85.75 Ω □(-1) at a transmittance of 85%. The TCFs exhibited no appreciable change over 200 repeated bending cycles. Dispersing SWCNTs with this newly synthesized polymer is an effective way to fabricate a transparent, highly conductive and flexible film.
To improve the dispersion of silica in silica-filled styrene-butadiene rubber tire tread compounds, we synthesized poly(styrener-butadiene)-b-poly(poly(ethylene glycol) methyl ether methacrylate) (p(SB-b-PEGMA)) as a silica dispersant. p(SB-b-PEGMA) was synthesized by combining living anionic polymerization (LAP) and atom transfer radical polymerization (ATRP). Initially, αbromoisobutyryl-terminated poly(styrene-r-butadiene) (pSB-Br) was prepared by LAP of styrene and butadiene and sequential additions of ethylene oxide and α-bromoisobutyryl bromide. pSB-Br was then used as the macroinitiator in the ATRP of PEGMA (M n = 300 g mol −1 ). The structure of p(SB-b-PEGMA) was characterized using gel permeation chromatography and 1 H NMR spectroscopy. The application of p(SB-b-PEGMA) as a silica dispersant in styrene-butadiene rubber/silica decreased the optimal vulcanization time and improved the mechanical properties, which included 100% and 300% moduli, crosslinking density and silica dispersion.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.