Poly (Ricinoleic Acid) Based Novel Thermosetting Elastomer

Abstract

A novel bio-based thermosetting elastomer was prepared by the lipase-catalyzed polymerization of methyl ricinoleate with subsequent vulcanization. Some mechanical properties of the cured carbon black-filled polyricinoleate compounds were evaluated as a thermosetting elastomer. It was found that the carbon black-filled polyricinoleate compounds were readily cured by sulfur curatives to produce a thermosetting elastomer that formed a rubber-like sheet with a smooth and non-sticky surface. The curing behaviors and mechanical properties were dependent on both the molecular weight of the polyricinoleate and the amount of the sulfur curatives. Cured compounds consisting of polyricinoleate with a molecular weight of 100,800 showed good mechanical properties, such as a hardness of 48 A based on the durometer A measurements, a tensile strength at break of 6.91 MPa and an elongation at break of 350%.

Synthesis of Ricinoleic Acid Estolides by the Esterification of Ricinoleic Acids Using Functional Acid Ionic Liquids as Catalysts

“…As shown in Fig. 2, the activities of four functional ILs as catalysts for the esterification of ricinoleic acid decreased in the order of BSO 3 HMIM TS BSO 3 HMIM OTF BSO 3 HMIM HSO 4 BSO 3 HMIM HPO 4 . Among the ILs tested, BSO 3 HMIM TS showed the highest catalytic activity, and an estolides with a high degree of polymerization 56.9 2.9 mg KOH/g was obtained in 10 h Fig.…”

“…Ionic liquids ILs : 1-butylsulfonic-3-methylimidazolium tosylate BSO 3 HM-IM TS , 1-butylsulfonic-3-methylimidazolium hydrogensulfate BSO 3 HMIM HSO 4 , 1-butylsulfonic-3-methylimidazolium trifluoromethanesulfonate BSO 3 HMIM OTF and 1-butylsulfonic-3-methylimidazolium hydrophosphate BSO 3 HMIM HPO 4 were purchased from Shanghai Cheng Jie Chemical Co. Ltd Shanghai, China . Ethyl acetate 99.5 purity was purchased from Tianjin Kemiou Chemical Reagent Co. Ltd Tianjin, China .…”

Cost‐effective synthesis of polyricinoleate: Investigation of coating characteristics,in vitrodegradation, and antibacterial activity

“…This polymer was reported to be soft material at room temperature, with T g = −74.8 °C, exhibited no crystallinity, and was readily biodegraded by activated sludge. Crosslinking of these high‐molecular‐weight polyricinoleate with dicumyl peroxide and sulfur curatives yielded rubber‐like thermosetting elastomers . In another study, high‐molecular‐weight polyepoxyricinoleate ( M w = 272 000 gmol −1 ) was prepared by enzymatic polycondensation of methyl epoxyricinoleate using immobilized lipase from Burkholderia cepacia for 7 days, at 80 °C.…”

Electrospun Fibers Containing Bio‐Based Ricinoleic Acid: Effect of Amount and Distribution of Ricinoleic Acid Unit on Antibacterial Properties

“…It derives from the selfpolycondensation of ricinoleic acid (RA), the main constituent of castor oil, extracted from the beans of the castor plant, Ricinus communis, of the Euphorbiaceae family. [15] PRA contains two functional groups (hydroxyl and carboxyl group) in the monomeric units, as well as a D9 unsaturation and an aliphatic side chain; it is an amorphous polymer with a very low glass transition temperature (T g ) around -70 8C, indicating a very flexible chain and the difficulty of reaching an ordered state. [16][17][18][19] The biocidal effect of RA is attested in many literature papers describing the behavior of the extract from Ricinus communis seeds against some human pathogens, [20,21] and also of some derivatives of ricinoleic acid.…”