Tetrahydrofuran thf

Phenyltrimethoxysilane (Gelest, 98%, Morrisville, PA, USA) and 3-glycidoxypropyltrimethoxysilane (Gelest, 98%) were distilled over CaH₂ prior to use. Potassium carbonate (K₂CO₃) (Daejung Chemicals, 99.9%, Siheung-si, Republic of Korea) was dried under vacuum at room temperature prior to use. All other solvents were of reagent grade. Tetrahydrofuran (THF) (Daejung Chemicals) was used as a commercial solvent. Terbium(III) nitrate hexahydrate and europium(III) nitrate pentahydrate were purchased from Sigma-Aldrich (St. Louis, MO, USA).

Sodium hydride 60%, magnesium turnings, and potassium persulfate were purchased from Daejung, S. Korea. Dimethylformamide (DMF), 4-vinylbenzyl chloride (VBC), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), 4,4′-azobis(4-cyanovaleric acid) (ABCA), dimethyl sulfoxide (DMSO), butyl methacrylate (BMA), bromobenzene, and iodine were purchased from Sigma-Aldrich, Schnelldorf, Germany. Pyrroles and carbon disulfide were purchased from Daejung, Korea, diethyl ether from Sigma-Aldrich, Schnelldorf, Germany, magnesium sulfate and petroleum ether were from Fisher Scientific, Chicago, IL, USA, and tetrahydrofuran (THF) was purchased from Daejung, Korea. Silica-gel, FeCl₂.4H₂O, and FeCl₃.6H₂O were purchased from UniChem USA. n-Hexane was purchased from Sigma-Aldrich, Germany. Aprepitant and sofosbuvir were donated by Ferozsons pharmaceutical company, Nowshera, Pakistan.

The ESBR and RAFT ESBR were used after coagulating latex with NaCl and H₂SO₄. Carbon black N330 (OCI, Korea) was used as a filler when manufacturing the carbon black-filled compound. Zinc oxide (ZnO) and stearic acid (CH₃(CH₂)₁₆COOH) as additives, N-(1,3-dimethybutyl)-N’-phenyl-phenylenediamine (6PPD) as an antioxidant, sulfur, N-cyclohexyl benzothiazyl sulfenamide (CBS), and diphenyl guanidine (DPG) as vulcanization agents, were purchased from Merck, Kenilworth, NJ, USA.
Tetrahydrofuran (THF, Daejung, Korea) and n-hexane (Daejung, Busan, Korea) were used in order to remove organics from the vulcanizates prior to the swelling experiments. Toluene (Daejung, Korea) was used to confirm the crosslink density. Piperidine (Daejung, Korea), propane-2-thiol (Acros Organics, Waltham, MA, USA), and n-heptane (Samchun, Seoul, Korea) were used to destroy the vulcanizates structure.