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4,4’-偶氮-二(4-氰基戊酸)商品名称为V501,是一类重要的聚合物引发剂,可用于乙烯基单体聚合、乙烯基化合物的共聚等;它还是常用的水溶性自由基引发剂,可用于制备膨润土、无机纳米粒子包覆聚合物的改性;还可作为动力学勘测中自由基的来源、近紫外区有效的感光剂和水介质中氧的清除剂等。4,4’-偶氮-二(4-氰基戊酸)的合成目前主要有两种方法:(1)乙酰丙酸先在碱性条件下与水合肼反应生成连氮化合物,再与氰化氢反应,经氯
4,4’-azo-bis (4-cyanovaleric acid) is a class of important polymer initiators available under the tradename V501 and is used for the polymerization of vinyl monomers, copolymerization of vinyl compounds, etc. It is also commonly used Of water-soluble free radical initiator, which can be used for preparation of bentonite, modification of inorganic nanoparticle-coated polymer; also as a source of free radicals in kinetic investigation, effective photoprocessing agent in near ultraviolet region and elimination of oxygen in aqueous medium Etc. At present, there are mainly two methods for the synthesis of 4,4’-azo-bis (4-cyanovaleric acid): (1) Levulinic acid is first reacted with hydrazine hydrate to form a nitrogen compound under alkaline conditions, Hydrogenation reaction, the chlorine