Synthesis of novel diene polymer via friedel–crafts‐type reaction of polybutadiene with aromatic compounds

Abstract

This study describes a novel and facile synthesis strategy for a styrene‐butadiene rubber (SBR)‐like polymer via Friedel–Crafts‐type reaction between aromatic compounds and polybutadiene using an aluminum chloride as a catalyst. Although gelation was induced by a reaction of a generated carbocation with olefins in other polybutadiene chains in benzene and toluene because of their low electron densities on their rings, anisole with a higher electron density reacted with the polybutadiene carbocation efficiently. The introduction ratio of anisole increased as the reaction proceeded, and the obtained polymer, BRAN polymer, contained 15% anisoles for olefins in the polybutadiene in 4 h at 80 °C as estimated by 1H NMR analysis. The glass‐transition temperature (Tg) of the BRAN polymer also increased with anisole content (Tg ~−50 °C when anisole contents 20%). The vulcanizate containing the BRAN polymer showed higher mechanical properties compared to samples using other matrix polymers. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 841–847

Heterogeneous Catalytic Peroxide Oxidation Inducing Surface Reactions Toward Flotation Extraction of Hazardous Poly(Vinyl Chloride) From Waste Plastics

“…Table S1 provides the assignment and specific value of peaks in 1 H NMR spectra, where the number of protons in benzene rings is set as 1. The signals of phenyl peaks are observed in the range of 6–7.5 ppm, the CH of butadiene is located at 5–5.5 ppm, and the signals at 1–2.5 ppm are assigned to protons on backbone chains of plastics . Subgraphs in Figure describe the chemical structures of plastics.…”

“…Besides, surface reactions normally occur on reactive sites independent of ROS. 52 Therefore, similar functional groups and segments possibly indicate comparable oxidation routes of different plastics.…”

Bio-based cyclized Eucommia ulmoides gum elastomer for promising damping applications

“…In this paper, EUG was cyclized in xylene by using TiCl 4 / CH 3 COOH as catalysts for the rst time to prepare damping elastomer (shown in Scheme 1). 24,25 The cyclization reaction conditions were discussed, the structure and properties of CEUG and its vulcanizates were also evaluated. Aer cyclization, its tan d increased greatly.…”