Effect of Reversible Addition-Fragmentation Transfer Emulsion Styrene Butadiene Rubber (RAFT ESBR) on the Properties of Carbon Black-Filled Compounds

Abstract

Tread is an important component that directly affects the performance of passenger car radial (PCR) tires. Styrene-butadiene rubber (SBR) is mainly used for tire tread and it includes solution styrene-butadiene rubber (SSBR) and emulsion styrene-butadiene rubber (ESBR). Although SSBR is mainly used, the manufacturing process for SSBR is more challenging than ESBR, which is environmentally friendly, but has the disadvantage of a broad molecular weight distribution. To overcome this, a reversible addition-fragmentation radical transfer (RAFT) polymerization technique is used in ESBR polymerization. An environmentally friendly RAFT ESBR with a narrow dispersity can be polymerized. Here, carbon black-filled compounds were manufactured while using RAFT ESBR, and their properties were compared to ESBR. The analysis showed a low crosslink density of RAFT ESBR, due to the high polysulfide crosslink structure. We manufactured a carbon black-filled compound with the same crosslink density and structure as the ESBR carbon black-filled compound, and the effect of the dispersity of the base polymer was investigated. RAFT ESBR showed 9% better abrasion resistance and 29% better fuel efficiency than ESBR, according to the analysis of the data. The narrow dispersity can reduce energy loss and positively influence the abrasion resistance and fuel efficiency.

Development and Application of a Poly(acrylic acid)-Grafted Styrene–Butadiene Rubber as a Binder System for Silicon-Graphite Anodes in Li-Ion Batteries

“…Meanwhile, the peaks in the region of 0.5–3.0 ppm are due to the protons associated with the saturated hydrocarbons section of the backbone chain and include groups such as CH 3 , CH 2 , and CH . The peaks in this spectrum were found to overlap, and this agrees with the NMR SBR spectra of previous studies. , …”

“…25 The peaks in this spectrum were found to overlap, and this agrees with the NMR SBR spectra of previous studies. 26,27 The 1 H NMR spectrum of PtBa-g-SBR was found to be very similar to that of the spectrum of the SBR starting material, with the addition of the singlet at 1.47 ppm (C(CH 3 ) 3 ) from the tert-butyl groups. However, as the 1 H NMR did not confirm if the tert-butyl group was grafted onto the SBR backbone chain or was present as part of a separate polymer, a diffusion-ordered spectroscopy NMR spectrum was also obtained.…”

Effect of Epoxide Content on the Vulcanizate Structure of Silica-Filled Epoxidized Natural Rubber (ENR) Compounds

“…Synthetic rubber is often used as the base rubber for passenger car radial (PCR) tire treads. Therefore, efforts to improving tire performance have focused on adjusting the molecular weight, microstructure of synthetic rubber, and introducing functional groups [ 3 , 4 ]. However, TBR tire treads need to withstand a larger load and longer operation times.…”