Living radical polymerization of methyl methacrylate was investigated using a new initiation system, i. e. DCDPS/Fe(DC)3, in which diethyl 2,3-dicyano-2,3-diphenyl-succinate(DCDPS) is a hexa-substituted ethane thermal...Living radical polymerization of methyl methacrylate was investigated using a new initiation system, i. e. DCDPS/Fe(DC)3, in which diethyl 2,3-dicyano-2,3-diphenyl-succinate(DCDPS) is a hexa-substituted ethane thermal iniferter and ferric tri(diethyldithiocarbamate)(Fe(DC)3) is a ligand-free catalyst. The polymerization was successfully controlled in bulk at 95 ℃, PMMA with high molecular weight and quite narrow polydispersities(Mw/Mn=1.20～1.29) were obtained. End group analysis by 1H NMR spectroscopy shows that the resulting PMMA is ω-functionalized by a DC group.展开更多
以2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体、CuCl/N,N,N′,N′-四甲基乙二胺(TMEDA)为催化体系,氯乙酰化聚苯乙烯微球(PS-acyl-Cl)为大分子引发剂,经原子转移自由基聚合反应(ATRP),于微球表面接枝聚脂肪族磺酸(PAMPS)链段获得脂肪族磺酸...以2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体、CuCl/N,N,N′,N′-四甲基乙二胺(TMEDA)为催化体系,氯乙酰化聚苯乙烯微球(PS-acyl-Cl)为大分子引发剂,经原子转移自由基聚合反应(ATRP),于微球表面接枝聚脂肪族磺酸(PAMPS)链段获得脂肪族磺酸基强酸性阳离子交换树脂(PS-g-PAMPS)。考察了反应温度、溶剂体系、pH值、催化剂、反应时间等条件对接枝反应的影响,在优化的反应条件下,使用氯乙酰基担载量为3.82 mmol g 1的PS-acyl-Cl,10 h可获得担载量为1.99 mmol g 1的PS-g-PAMPS。产物经过红外,元素分析表征。该PS-g-PAMPS较传统的磺酸基树脂有较长的手臂长度,位阻小,易于和其它物质反应,TG分析显示具有很好的热稳定性。展开更多
4-[4-benzoyl(phenoxy) phenyl] Phenyl Iodonium Hexafluorophosphate(Ⅲ) was synthesized from diphenyl ether and iodobenzene as main crude material through Friedel-Crafts acylation、substitution reaction and metathesis....4-[4-benzoyl(phenoxy) phenyl] Phenyl Iodonium Hexafluorophosphate(Ⅲ) was synthesized from diphenyl ether and iodobenzene as main crude material through Friedel-Crafts acylation、substitution reaction and metathesis.Ⅲ was a novel Free radical-Cationic Hybrid UV photoinitiator and the structure was identified by UV,1HNMR,IR and MS,and discussed the modification of synthetic route.展开更多
文摘Living radical polymerization of methyl methacrylate was investigated using a new initiation system, i. e. DCDPS/Fe(DC)3, in which diethyl 2,3-dicyano-2,3-diphenyl-succinate(DCDPS) is a hexa-substituted ethane thermal iniferter and ferric tri(diethyldithiocarbamate)(Fe(DC)3) is a ligand-free catalyst. The polymerization was successfully controlled in bulk at 95 ℃, PMMA with high molecular weight and quite narrow polydispersities(Mw/Mn=1.20～1.29) were obtained. End group analysis by 1H NMR spectroscopy shows that the resulting PMMA is ω-functionalized by a DC group.
文摘以2-丙烯酰胺-2-甲基丙磺酸(AMPS)为单体、CuCl/N,N,N′,N′-四甲基乙二胺(TMEDA)为催化体系,氯乙酰化聚苯乙烯微球(PS-acyl-Cl)为大分子引发剂,经原子转移自由基聚合反应(ATRP),于微球表面接枝聚脂肪族磺酸(PAMPS)链段获得脂肪族磺酸基强酸性阳离子交换树脂(PS-g-PAMPS)。考察了反应温度、溶剂体系、pH值、催化剂、反应时间等条件对接枝反应的影响,在优化的反应条件下,使用氯乙酰基担载量为3.82 mmol g 1的PS-acyl-Cl,10 h可获得担载量为1.99 mmol g 1的PS-g-PAMPS。产物经过红外,元素分析表征。该PS-g-PAMPS较传统的磺酸基树脂有较长的手臂长度,位阻小,易于和其它物质反应,TG分析显示具有很好的热稳定性。
文摘4-[4-benzoyl(phenoxy) phenyl] Phenyl Iodonium Hexafluorophosphate(Ⅲ) was synthesized from diphenyl ether and iodobenzene as main crude material through Friedel-Crafts acylation、substitution reaction and metathesis.Ⅲ was a novel Free radical-Cationic Hybrid UV photoinitiator and the structure was identified by UV,1HNMR,IR and MS,and discussed the modification of synthetic route.
