Synthesis and characterization of polymers from soybean oil and p‐dinitrosobenzene

Abstract

In this study, rubbery, bio-based thermoset polymers were synthesized from soybean oil (SO) and pdinitrosobenzene (DNB) via an ene reaction. Polymeric pdinitrosobenzene (PDNB) was synthesized from p-quinone dioxime and was thermally depolymerized in the presence of SO. SO/PDNB polymers were synthesized by a twostage polymerization. During the reaction, the role of different parameters such as mol ratio of SO and PDNB, preheating temperature of SO, polymerization time, and temperature were examined. Polymerization was followed by IR spectroscopy, and the polymers obtained were characterized by dynamic mechanical analysis, thermogravimetric analysis, and differential scanning calorimetry. The polymers have glass transition temperature ranging from À51.5 C to À46.3 C, whereas their storage moduli are between 430 and 210 MPa at À60C. Thermogravimetric analysis reveals that all of the polymers have temperatures of maximum degradation around 500 C. The crosslinked network structure of the polymers was investigated by swelling behavior and surface hardness test. Methyl oleate was used as a model compound to examine the chemical structure of the products.

Impact of the Microstructure on Electrochemical Performances of Dilithium Benzoquinone Dioximate as a Positive Material for a Li-Ion Battery

“…This crucial feature is of great interest because most of the time, the oxidized version of the quinone, for example, is generally soluble and leads to a loss of capacity. The presence of a polymer in the oxidized state should make it possible to avoid such phenomena . NMR spectrum of PNND showed the disappearance of hydroxide peak at 12.10 ppm.…”

“…The presence of a polymer in the oxidised state should make it possible to avoid such phenomena. 18 NMR spectrum of PNND showed the disappearance of hydroxide peak at 12.10 ppm. Moreover, all the other peaks were shifted to upfield, from 7.85-6.44 ppm to 7.23-6.65 ppm, for the presence of O-N=N-O group (Figure S5).…”

Sustainable Fiber‐Reinforced Composites: A Review

“…[283] The tribological properties of brake pads were significantly enhanced by the addition of RS and rice husk dust into the composites. [284] In another study, the friction coefficient and wear rate of chopped sugar cane fiber reinforced polyester (CSCRP) were compared with those of chopped glass fiber reinforced polyester (C-GRP) composites at different lengths of fiber. For 1 mm of fiber it was found that the wear rate of CSCRP composites was nearly 10 times higher than C-GRP composites.…”

Regioselective synthesis of novel nitroso-pyrazolylquinoxalines via HOAc-mediated cyclocondensation of 2-hydroxyimino-1,3-diketones with hydrazinylquinoxalines

“…21 Additionally, certain nitroso compounds are low-temperature structuring agents to produce of synthetic rubbers. 22 Furthermore, a number of review papers have been devoted to computations, chemistry and applications of C -nitroso compounds. 22 a ,23…”