【摘要】 制备出2种含有单羟基的二苯甲酮类化合物:4-[(2-羟乙基)(甲基)氨苯基]苯甲酮(NBP)与(4-氯苯基)[4-(2-羟乙基)(甲基)氨基]苯甲酮(NBP-Cl),以此为引发剂引发D,L-丙交酯聚合制备不同分子量的聚乳酸(PLA),并对其进行结构表征和性能测试.光学测试结果表明,在室温条件下,NBP和NBP-Cl仅具有荧光发射性能,而PLA表现出荧光和室温磷光双重发光性能;重原子效应导致聚合物室温磷光增强,但磷光寿命减少;随着PLA分子量的减小,聚合物磷光寿命先增加后减少.PLA的热重分析数据显示其具有优异的热学性能,大大拓宽了该双重发光材料的应用范围.更多还原

【Abstract】 Two kinds of benzophenone derivatives:( 4-[( 2-hydroxyethyl)( methyl) amino] phenyl)benzophenone( NBP),( 4-chlorophenyl)( 4-[( 2-hydroxyethyl)( methyl) amino] benzophenone( NBP-Cl),and a series of hydroxyl-terminated polylactic acid( PLA) with different molecular weight were prepared based on D,L-lactide polymerization. The structures and properties of NBP,NBP-Cl and PLA were characterized.Optical test results showed that the NBP and NBP-Cl only had fluorescence emission property at room temperature,however,PLA demonstrated fluorescence and phosphorescence dual light-emitting properties; the heavy atom effect enhanced the room temperature phosphorescence of PLA,but which decreased the phosphorescence lifetime; with the decrease of the molecular weight of PLA,the phosphorescence lifetime increased and then reduced. PLA thermal gravimetric analysis( TGA) data showed that this material had excellent thermal performance,which greatly broaden the applications of the dual light-emitting materials.更多还原