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利用二硫代酯直接光裂解进行活性自由基聚合

发表时间:2017-04-14  浏览量:1351  下载量:330
全部作者: 李佳佳,丁春来,李娜,张正彪,朱健,朱秀林
作者单位: 苏州大学材料与化学化工学部
摘 要: 利用二硫代羰基苯甲酸异丁腈酯(CPDB)作为引发-调控双功能试剂,对甲基丙烯酸酯类单体进行光引发可逆失活自由基聚合。该聚合反应在蓝光LED灯辐照、室温等温和条件下完成。该法制备所得聚合物端基功能度高且分子量分布窄。同时,该聚合体系由于使用CPDB,故对不同种类功能性甲基丙烯酸酯类单体聚合均显示出较好的调控能力,例如甲基丙烯酸缩水甘油酯(GMA)、聚乙二醇丙烯酸甲酯(PEGMA)、甲基丙烯酸N,N-二甲基氨基乙酯(DMAEMA)和甲基丙烯酸羟乙酯(HEMA)。将制备所得聚合物结构通过核磁共振(nuclear magnetic resonance,NMR)及基质辅助激光解吸飞行时间(matrix assisted laser desorption/ionization time-of-flight,MALDI-TOF)质谱进行表征,并提出该体系可能的聚合机理。
关 键 词: 高分子化学;活性自由基聚合;光解;二硫代酯;室温
Title: Living radical polymerization utilizing the direct photolysis of dithiocarbamate
Author: LI Jiajia, DING Chunlai, LI Na, ZHANG Zhengbiao, ZHU Jian, ZHU Xiulin
Organization: College of Chemistry, Chemical Engineering and Materials Science, Soochow University
Abstract: Photo-induced reversible deactivation radial polymerization of methacrylates was performed using 2-(2-cyanopropyl) dithiobenzoate (CPDB) as the initiation-regulation dual functional agent. The polymerization was carried out under mild conditions, such as the irradiation of blue LED light and ambient temperature. Well-controlled polymers with high degree of chain end fidelity and narrow molecular weight distribution were obtained. This polymierzation system also showed well controlled ability for functional methacrylates, such as glycidyl methacrylate (GMA), polyethylene glycol methacrylate (PEGMA), N,N-2-(dimethyl amino)ethyl methacrylate (DMAEMA) and hydroxyethyl methacrylate (HEMA) due to the use of CPDB. The structure of the obtained polymers were characterized by nuclear magnetic resonance (NMR) and matrix assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. The possible mechnism was proposed for the current polymerization.
Key words: polymer chemistry; living radical polymerization; photolysis; dithiocarbamate; ambient temperature
发表期数: 2017年4月第7期
引用格式: 李佳佳,丁春来,李娜,等. 利用二硫代酯直接光裂解进行活性自由基聚合[J]. 中国科技论文在线精品论文,2017,10(7):769-776.
 
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