摘要
以AIBN为引发剂、FeCl3为催化剂、PPh3为配体,在乙腈中实现了N-乙烯基吡咯烷酮(M,P)的反向原子转移自由基聚合(RATRP)。动力学研究表明,聚合产物聚乙烯基吡咯烷酮(PVP)的分子量与单体转化率成线性关系,反应10h后,PVP的平均分子量丽。为2964,分子量分散系数(PDI)为1.18。以含有端基Cl原子的PVP-Cl作为大分子引发剂,FeCl2/PPh3为催化体系,通过甲基丙烯酸甲酯(MMA)的原子转移自由基聚合(ATRP)合成了嵌段共聚物(PVP—b-iPMMA),用凝胶渗透色谱(GPC)、红外光谱(FT-IR)和核磁共振(^1H-NMR)等方法对产物进行了表征。
The reverse atom transfer radical polymerization (RATRP) of N-vinylpyrrolidone (NVP), with acetonitrite as solvent, azodiisobutyronitrile(AIBN) as initiator, FeCl3 as catalyst and PPh3 as ligand was carried out successfully. The kinetic results suggest a linear increase in experimental number-average molecular weight (Mn) with increase of monomer conversion. The Mn and the polydispersity(PDI) are 2964 and 1.18 respectively after 10 hours. The poly(N-vinylpyrrolidone)(PVP) ended with chlorine groups with narrow polydispersity can initiate atom transfer radical polymerization of methyl methacrylate(MMA) to produce well-defined PVP-b-PMMA. The block copolymer was characterized by gel permeation in chromatography(GPC), Fourier transform infrared spectrum (FT- IR) and ^1H nuclear magnetic resonance spectrum(^1H-NMR).
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第6期18-21,共4页
Polymer Materials Science & Engineering
基金
广东省自然科学基金资助项目(07001781)
广东省科技计划项目(2007B010600058
2006B13801005)