Novel trisubstituted ethylenes, dimethyl, dimethoxy, and halogen ring-substituted isopropyl cyanophenylacrylates, RPhCH=C(CN)CO2CH(CH3){2|two} ({where|exactly where} R is {2|two},3-dimethyl, {2|two},4-dimethyl, {2|two},5-dimethyl, {2|two},6-dimethyl, {3|three},4-dimethyl, {3|three},5-dimethyl, {2|two},3-dimethoxy, {2|two},4-dimethoxy, {2|two},5-dimethoxy, 2-Br, 3-Br, 4-Br, 2-Cl, 3-Cl, 4-Cl, 2-F, 3-F, 4-F) {were|had been|have been} {prepared|ready} and copolymerized with styrene. The monomers {were|had been|have been} synthesized by the piperidine catalyzed Knoevenagel condensation of ring-substituted benzaldehydes and isopropyl cyanoacetate and characterized by CHN elemental {analysis|evaluation}, IR, 1H- and 13C-NMR. {All the|All of the|Each of the} ethylenes {were|had been|have been} copolymerized with styrene in {solution|answer|remedy|resolution|option} with radical initiation (ABCN) 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 IR, 1H and 13C-NMR, GPC, 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} 219-500°C {range|variety} with residue (0.9-5.{6|six} % wt), which then decomposed {in the|within the|inside the} 500-800ºC {range|variety}. Buy(6Z,9Z)-18-Bromooctadeca-6,9-diene 2072801-99-9 custom synthesis PMID:23819239
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