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统计结构含氟丙烯酸酯共聚物的合成与表征
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作者 张庆华 詹晓力 陈丰秋 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2009年第2期427-429,共3页
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 kinetic... 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. 展开更多
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
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