统计结构含氟丙烯酸酯共聚物的合成与表征  

Synthesis and Characterization of Statistical Fluorinated Copolymers via RAFT Miniemulsion Polymerization

作　　者：张庆华[1] 詹晓力[1] 陈丰秋[1] 

机构地区：[1]浙江大学化工系,杭州310027

出　　处：《高等学校化学学报》2009年第2期427-429,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20576117;20806067)资助

摘　　要：Reversible addition fragmentation chain transfer(RAFT)mediated miniemulsion copolymerizations of butyl methacrylate with fluoroacrylate were carried out at 70 ℃ with potassium persulphate as initiator,and the kinetics of copolymerizations were investigated.Copolymer compositions at low conversion levels were determined by 1H NMR spectra techniques.In the presence of RAFT agent 2-cyanoprop-2-yl dithiobenzoate(CPDB),the copolymerization of BMA with FMA in miniemulsion exhibited typical features of a controlled mole-cular weights and narrow polydispersities.The reactivity ratios were evaluated by Kellen-Tudos(K-T)method,which yields the apparent reactivity ratios,rBMA=0.63 and rFMA=0.79.The results show that the monomer FMA with a fluorinated side chain is more reactive than BMA,and the copolymerizations have a tendency to alternate and to produce a higher FMA content in the copolymers.The spontaneous statistical copolymers with soft gradient shapes were obtained using variable initial ratios of BMA and FMA.Reversible addition fragmentation chain transfer（RAFT） mediated miniemulsion copolymerizations of butyl methacrylate with fluoroacrylate were carried out at 70 ℃ with potassium persulphate as initiator, and the kinetics of copolymerizations were investigated. Copolymer compositions at low conversion levels were determined by ^1H NMR spectra techniques. In the presence of RAFT agent 2-cyanoprop-2-yl dithiobenzoate （ CP- DB）, the copolymerization of BMA with FMA in miniemulsion exhibited typical features of a controlled molecular weights and narrow polydispersities. The reactivity ratios were evaluated by Kellen-Tudos（K-T） method, which yields the apparent reactivity ratios, rBMA = 0. 63 and rFMn = 0. 79. The results show that the monomer FMA with a fluorinated side chain is more reactive than BMA, and the copolymerizations have a tendency to alternate and to produce a higher FMA content in the copolymers. The spontaneous statistical copolymers with soft gradient shapes were obtained using variable initial ratios of BMA and FMA.

关 键 词：可逆链转移 细乳液聚合 统计结构共聚物 氟代丙烯酸酯 

分 类 号：O631[理学—高分子化学]