An Orthogonal Modular Approach to Macromonomers Using Clickable Cyclobutenyl Derivatives and RAFT Polymerization
作者:Dao Le、Véronique Montembault、Sagrario Pascual、Stéphanie Legoupy、Laurent Fontaine
DOI:10.1021/ma3016163
日期:2012.10.9
mediate the RAFT polymerization of ethyl acrylate and N-isopropylacrylamide. Well-defined polymers with controlled molecular weights (Mn = 3700–11 500 g·mol–1) and narrow molecular weight distributions (PDI = 1.06–1.14) were thus obtained that retain the cyclobutene functionality, demonstrating the orthogonality of the RAFT process toward the cyclobutenyl insaturation. Combination of CuACC and RAFT polymerization
衍生自单甲醚聚环氧乙烷(PEO),聚丙烯酸乙酯(PEA),聚N-异丙基丙烯酰胺(PNIPAM)和PEO- b的一系列基于环丁烯的大分子单体-PNIPAM是通过“点击”铜催化的叠氮化物-炔烃环加成(CuAAC)和可逆加成-断裂链转移(RAFT)聚合反应合成的。首先,成功地获得了具有叠氮基,炔烃和/或链转移剂的原始二官能和三官能环丁烯前体,并对其进行了充分表征。然后将叠氮基和炔基官能化的环丁烯与带有叠氮基或炔基的改性PEO偶联,从而产生定量环化的基于环丁烯的PEO,如NMR光谱法和MALDI-TOF质谱法所确定的。新的链转移剂封端的环丁烯用于介导丙烯酸乙酯和N-异丙基丙烯酰胺的RAFT聚合。分子量可控的定义明确的聚合物(M n= 3700–11 500 g·mol –1)和窄分子量分布(PDI = 1.06-1.14),因此保留了环丁烯官能度,证明了RAFT过程对环丁烯基不饱和度的正交性。使用