Novel acid initiators for the rapid cationic polymerization of styrene in room temperature ionic liquids  

作　　者：VIJAYARAGHAVAN R. MACFARLANE D. R. 

机构地区：[1]Department of Chemistry, Monash University, Clayton Campus, Victoria 3800, Australia

出　　处：《Science China Chemistry》2012年第8期1671-1676,共6页中国科学（化学英文版）

摘　　要：Cationic polymerization of styrene has been achieved using several novel acidic initiators in room temperature ionic liquids (ILs) under mild reaction conditions to obtain polymers of low molecular weight with narrow polydispersity. Both strong protic acids such as bis(trifluoromethanesulfonyl) amide acid (HTFSA) and a moderately weak acid such as bisoxalato phosphorous acid (HBOP) have been studied as initiators. It has been observed that HTFSA initiates the polymerization rapidly even at room temperature and below, as compared to HBOP which produces a slower polymerization requiring elevated temperatures to complete. The relative difference in reactivity of the initiators as compared to the previously described HBOB initiator is discussed in terms of the difference in their proton acidity and the consequential basicity of the anions. The efficiency of different ILs as the reaction solvent is also presented.Cationic polymerization of styrene has been achieved using several novel acidic initiators in room temperature ionic liquids （ILs） under mild reaction conditions to obtain polymers of low molecular weight with narrow polydispersity. Both strong pro- tic acids such as bis（trifluoromethanesulfonyl） amide acid （HTFSA） and a moderately weak acid such as bisoxalato phospho- rous acid （HBOP） have been studied as initiators. It has been observed that HTFSA initiates the polymerization rapidly even at room temperature and below, as compared to HBOP which produces a slower polymerization requiring elevated temperatures to complete. The relative difference in reactivity of the initiators as compared to the previously described HBOB initiator is discussed in terms of the difference in their proton acidity and the consequential basicity of the anions. The efficiency of dif- ferent ILs as the reaction solvent is also presented.

关 键 词：cationic polymerization HTFSA HBOP ILS POLYDISPERSITY 

分 类 号：O631.5[理学—高分子化学]