CAJ | 학술논문

通过链转移自由基聚合和端基置换反应得到苯乙烯封端的具有亲水基团的大分子单体聚N-乙烯基乙酰胺( PNVA)，与疏水性苯乙烯进行分散共聚，制备出具有核壳结构的聚乙烯酰胺接枝聚苯乙烯( PNVA-g-PSt)纳米微球，在酸性条件下使其水解得到聚乙烯胺接枝聚苯乙烯( PVAm-g-PSt)微球，与对甲基偶氮羧反应，得到表面带有功能基的PVAm-g-PSt微球，并考察功能化聚合物微球对Pb2+的吸附动力学、吸附机理，探讨pH值对吸附效果的影响，同时发现在较低浓度范围内，对Pb2+的吸附率可达100％。
통과련전이자유기취합화단기치환반응득도분을희봉단적구유친수기단적대분자단체취N-을희기을선알( PNVA)，여소수성분을희진행분산공취，제비출구유핵각결구적취을희선알접지취분을희( PNVA-g-PSt)납미미구，재산성조건하사기수해득도취을희알접지취분을희( PVAm-g-PSt)미구，여대갑기우담최반응，득도표면대유공능기적PVAm-g-PSt미구，병고찰공능화취합물미구대Pb2+적흡부동역학、흡부궤리，탐토pH치대흡부효과적영향，동시발현재교저농도범위내，대Pb2+적흡부솔가체100％。
Poly( N-vinylacetamide) ( PNVA) macromonomers with a vinyl benzyl group at the end of the polymer chains were synthesized by free radical polymerization and end capping reaction. Poly ( N-vinylacrylamide ) -graft-polystyrene ( PNVA-g-PSt ) microsphere was prepared by dispersion copolymerization. Poly ( vinylamine ) grafted polystyrene ( PVAm-g-PSt) microsphere could be prepared by hydrolysis of PNVA-g-PSt microsphere, and condensed with the functional compound contained carboxyl group such as carboxyazo-p-CH3. The adsorption mechanism, absorption kinetic equation and pH influence of the functionalized microsphere for Pb2+ ion were studied. At lower ion concentration, Pb2+ could be taken off completely.