在双子型阳离子表面活性剂双十六烷基四甲基溴化乙二铵(21631)和非离子表面活性剂氟代脂肪醇聚氧乙烯醚等作用下,将全氟烷基乙基丙烯酸酯(FA)与甲基丙烯酸十八醇/十二醇酯(SLMA)、甲基丙烯酸二甲氨乙酯(DM)及丙烯酸羟丙酯(HPA)〔m(FA)∶...在双子型阳离子表面活性剂双十六烷基四甲基溴化乙二铵(21631)和非离子表面活性剂氟代脂肪醇聚氧乙烯醚等作用下,将全氟烷基乙基丙烯酸酯(FA)与甲基丙烯酸十八醇/十二醇酯(SLMA)、甲基丙烯酸二甲氨乙酯(DM)及丙烯酸羟丙酯(HPA)〔m(FA)∶m(SLMA)∶m(DM)∶m(HPA)=80∶16.5∶3∶0.5〕在水相乳液中共聚,制得了一种略带荧光的阳离子氟代聚丙烯酸酯FA-co-SLMA-co-DM-co-HPA(FSLDH)乳液。用红外光谱(IR)和核磁共振氢谱(1HNMR)表征了主组分的结构,然后用原子力显微镜(AFM)、光电子能谱仪(XPS)等仪器研究了FSLDH乳液在纤维表面的成膜形态及疏水性能。结果表明,FSLDH乳液可在纤维表面形成一层相对光滑的有机氟聚合物膜。在FSLDH处理后的纤维表面,存在F、O、N、C元素。用FSLDH乳液处理棉纤维织物,能明显改善织物的拒水拒油性能,当FSLDH乳液用量达到5 g/100 g H2O时,水在织物表面的静态接触角可达到144.9°,拒水性可达到90分,拒油等级达到5级。展开更多
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
文摘在双子型阳离子表面活性剂双十六烷基四甲基溴化乙二铵(21631)和非离子表面活性剂氟代脂肪醇聚氧乙烯醚等作用下,将全氟烷基乙基丙烯酸酯(FA)与甲基丙烯酸十八醇/十二醇酯(SLMA)、甲基丙烯酸二甲氨乙酯(DM)及丙烯酸羟丙酯(HPA)〔m(FA)∶m(SLMA)∶m(DM)∶m(HPA)=80∶16.5∶3∶0.5〕在水相乳液中共聚,制得了一种略带荧光的阳离子氟代聚丙烯酸酯FA-co-SLMA-co-DM-co-HPA(FSLDH)乳液。用红外光谱(IR)和核磁共振氢谱(1HNMR)表征了主组分的结构,然后用原子力显微镜(AFM)、光电子能谱仪(XPS)等仪器研究了FSLDH乳液在纤维表面的成膜形态及疏水性能。结果表明,FSLDH乳液可在纤维表面形成一层相对光滑的有机氟聚合物膜。在FSLDH处理后的纤维表面,存在F、O、N、C元素。用FSLDH乳液处理棉纤维织物,能明显改善织物的拒水拒油性能,当FSLDH乳液用量达到5 g/100 g H2O时,水在织物表面的静态接触角可达到144.9°,拒水性可达到90分,拒油等级达到5级。
文摘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.
