CAJ | 학술논문

在不同溶剂采用沉淀聚合法制备了聚N-乙烯基己内酰胺PNVCL、聚N-乙烯基咪唑PNVI及其共聚物。实验发现,正己烷和环己烷适宜于PNVCL的沉淀均聚,甲苯适宜于PNVI的沉淀均聚,而两种单体共聚时,采用正己烷-甲苯混合溶剂可实现共聚物的沉淀聚合。考察了溶剂用量、引发剂AIBN用量、聚合温度、时间和搅拌对聚合物收率和温敏性的影响。采用分光光度计对温敏性进行了初步表征。结果表明,沉淀聚合得到的PNVCL具有最低临界溶液温度LCST,PNVI不具有LCST,共聚物的LCST突变不明显。
재불동용제채용침정취합법제비료취N-을희기기내선알PNVCL、취N-을희기미서PNVI급기공취물。실험발현,정기완화배기완괄의우PNVCL적침정균취,갑분괄의우PNVI적침정균취,이량충단체공취시,채용정기완-갑분혼합용제가실현공취물적침정취합。고찰료용제용량、인발제AIBN용량、취합온도、시간화교반대취합물수솔화온민성적영향。채용분광광도계대온민성진행료초보표정。결과표명,침정취합득도적PNVCL구유최저림계용액온도LCST,PNVI불구유LCST,공취물적LCST돌변불명현。
Precipitation polymerization of N-vinyl caprolactazm,N-vinyl imidazole and their mixtures was studied in different sol-vents. It was found that n-hexane and cyclohexane is suitable to homopolymarization of N-vinyl caprolactazm,toluene is suitable to homopolymarization of N-vinyl imidazole,the copolymerization of NVCL and NVI was realized in n-hexane and toluene mixtures. The effect of solvent amount,initiator AIBN amount,polymerization temeprature,time and agitation speed on polymer yield and theromo-sensitive property were investigated. The thermo-sensitive property of the polymer was characterized by visible spectrophotome-ter. Experimental results indicate that the polymers PNVCL obtained by precipitation polymerization exhibited low critical solution temperature LCST,PNVI did not exhibit LCST and the copolymer did not exhibit remarkable LCST.