摘要
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。
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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2014年第10期1655-1660,共6页
Chemical Research and Application
关键词
自由基溶液聚合
分子量可控
温敏型聚合物
沉淀聚合
Free radical solution polymerization
controllable molecular weight
thermo-sensitive polymer
precipitation polymeriza-tion
