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采用热分解和电沉积的方法制备了Ti/PbO2电极,并在Ti/PbO2电极的电催化作用下,在引发剂硝酸铈铵存在的条件下,成功将丙烯酰胺(AM)和丙烯酸(AA)共同聚合为聚(丙烯酰胺-co-丙烯酸)[P(AM-co-AA)]。利用红外光谱(IR)和循环伏安曲线(CV)讨论了共聚产物及其过程的动力学规律;采用黏度法测定了共聚产物的分子量;考察了在不同单体配比的条件下电流密度、引发剂浓度对共聚产物分子量和共聚反应单体转化率的影响。结果表明:丙烯酰胺和丙烯酸可以在硝酸铈铵Ce(Ⅳ)和电化学催化共同作用下共聚;在单体配比n(AM)∶n(AA)=2.3∶1,电流密度I=0.125A·cm-2,引发剂用量ω[Ce(Ⅳ)]=0.8%的条件下制得相对分子质量为6.5×105的聚(丙烯酰胺-co-丙烯酸),转化率可达到70%。
The Ti / PbO2 electrode was prepared by thermal decomposition and electrodeposition. Under the electrocatalysis of Ti / PbO2 electrode, acrylamide (AM) and acrylic acid (AA) Co-polymerized as poly (acrylamide-co-acrylic acid) [P (AM-co-AA)]. The kinetics of the copolymerization product and its process were discussed by IR and CV. The molecular weight of the copolymer was measured by viscosity method. The effects of different monomer ratio on the current density, Effect of Initiator Concentration on Molecular Weight of Copolymer and Conversion of Copolymerization Monomer. The results showed that acrylamide and acrylic acid could be copolymerized under ceric ammonium nitrate (Ce (Ⅳ)) and electrochemical catalysis. Under the monomer ratio n (AM): n (AA) = 2.3:1, the current density I = 0.125A (Acrylamide-co-acrylic acid) with a relative molecular mass of 6.5 × 10 5 under the condition that the amount of initiator ω [Ce (Ⅳ)] = 0.8%