Topic
Benzoic acid
About: Benzoic acid is a research topic. Over the lifetime, 11832 publications have been published within this topic receiving 167127 citations. The topic is also known as: Retardex & E210.
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TL;DR: In this paper, a comparative study was conducted into the thermo-oxidative degradation of poly(ethylene terephthalate) (PET) and poly(butylene terephate)(PBT) was carried out in an oxygen atmosphere at 160°C.
118 citations
TL;DR: The synthesis and anti-inflammatory activity of 4,5-dihydroxy-3-methyl-1H-pyrazolo[3,4-c]pyridazine-4, 5-diamine and 3- methyl-N4,N5-bis[4-benzimidazol-2yl](4-methylphenyl]-1H
117 citations
TL;DR: Vapour pressure of naphthalene and benzoic acid at temperatures near ambient was determined using an improved Knudsen effusion technique in this paper, where the experimental results were compared with literature values.
117 citations
TL;DR: In this article, some Bronsted acidic ionic liquids (TSILs) that bear an alkane sulfonic acid group in an acyclic trialkanylammonium cation were synthesized and their uses as dual solvent−catalysts for Fischer esterification reactions of acetic acid, metacetonic acid, and benzoic acid with ethanol, butanol, and benzyl alcohol were investigated.
Abstract: Some novel Bronsted acidic ionic liquids (TSILs) that bear an alkane sulfonic acid group in an acyclic trialkanylammonium cation were synthesized and their uses as dual solvent−catalysts for Fischer esterification reactions of acetic acid, metacetonic acid, and benzoic acid with ethanol, butanol, and benzyl alcohol were investigated. The reactions were completed smoothly at room temperature to 110 °C for 1.5−3.0 h with good yields of 88−95%. The results indicate that catalytic activity depends on anion acidity and the solubility of the starting material in TSILs. The increasing of the anion's acidity improves the catalytic activity of the TSILs. Furthermore, the produced esters could be separated by decantation after the reaction and the TSILs could be reused without noticeably decreasing the catalytic activity.
116 citations
TL;DR: In this paper, the mechanism of acid curing of epoxy resins catalyzed with tertiary amines was investigated by using model systems composed of phenylglycidyl ether and benzoic acid or acetic acid anhydrides in the presence of benzyldimethylamine.
Abstract: The mechanism of acid curing of epoxy resins catalyzed with tertiary amines was investigated by using model systems composed of phenylglycidyl ether and benzoic acid or acetic acid anhydrides in the presence of benzyldimethylamine. The reaction was studied by NMR spectrometry, liquid chromatography, and ozone absorption. The main findings are that (1) the tert-amine is bound chemically and irreversibly during the reaction under the formation of a quaternary ammonium salt
and (2) 1-phenyloxypropanediol-2,3-dibenzoate or diacetate is the main reaction product. The suggested reaction mechanism involves initiation in which the tertiary amine reacts with the epoxy group, giving rise to a zwitterion that contains a quaternary nitrogen atom and an alkoxide anion; the latter immediately reacts with the anhydride and quaternary salt is formed. In a later stage the carboxy anion of the quaternary salt reacts first with the epoxy group, then with the anhydride. By this reaction diester is formed and the carboxy anion is regenerated.
115 citations