Novel oxy ring-substituted isopropyl 2-cyano-3-arylacrylates, RPhCH=C(CN)CO2CH(CH3){2|two} ({where|exactly where} R is 3-phenoxy, 4-phenoxy, 2-benzyloxy, 3-benzyloxy, 4-benzyloxy, 4-acetyloxy, 3-acetyl, 4-acetyl, 4-acetylamino, 4-methoxy-2-methyl, 4-methoxy-3-methyl, 3-ethoxy-4-methoxy, {3|three},4-dibenzyloxy, 3-benzyloxy-4-methoxy, 4-benzyloxy-3-methoxy, {2|two},3-dimethyl-4-methoxy, {2|two},5-dimethyl-4-methoxy, {2|two},4-dimethoxy-3-methyl, {2|two},4-dimethoxy-6-methyl, {3|three},5-dimethoxy-4-hydroxy) {were|had been|have been} {prepared|ready} and copolymerized with styrene. The acrylates {were|had been|have been} synthesized by the piperidine catalyzed Knoevenagel condensation of oxy ring-substituted benzaldehydes and isopropyl cyanoacetate and characterized by CHN elemental {analysis|evaluation}, FTIR, 1H and 13C-NMR. {All the|All of the|Each of the} acrylates {were|had been|have been} copolymerized with styrene in {solution|answer|remedy|resolution|option} with radical initiation at 70°C. The composition {of the|from the|in the|on the|with the|of your} copolymers was calculated from nitrogen {analysis|evaluation}, {and the|and also the|as well as the|along with the|plus the} structures {were|had been|have been} analyzed by FTIR, 1H and 13C-NMR. Thermal properties {of the|from the|in the|on the|with the|of your} copolymers are characterized by DSC and TGA. Decomposition {of the|from the|in the|on the|with the|of your} copolymers in nitrogen occurred in two {steps|actions|measures|methods}, {first|initial|very first|1st|initially} {in the|within the|inside the} 200-500ºC {range|variety} {with a|having a|using a} residue, which then decomposed {in the|within the|inside the} 500-800ºC {range|variety}. 4-(Difluoromethyl)-3-fluorobenzoic acid site 31420-52-7 Data Sheet PMID:24576999
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