期刊
MACROMOLECULES
卷 44, 期 12, 页码 4681-4689出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma2010052
关键词
-
资金
- Karlsruhe Institute of Technology (KIT)
- German Research Council (DFG)
- Ministry of Science and Arts of the state of Baden-Wurttemberg
- Landesgraduiertenforderung Baden-Wurttemberg
A strategy for the modular ambient temperature synthesis of ABA and ABC triblock copolymers via a combination of photoinduced Diels-Alder reactions with thermal Diels-Alder reactions and azide-alkyne click chemistry is reported. Polystyrene (PS) and PMMA (PMMA) with alpha-2,5-dimethylbenzophenone and omega-cyclopentaclienyl or omega-azide end-functionality were prepared via atom transfer radical polymerization (ATRP) and subsequent transformation of the bromine end-group. The phototriggered conjugation reaction proceeds via an in situ formation of highly reactive o-quinodimethanes. Maleimide-capped poly(tert-butyl acrylate) obtained via ATRP was employed as dienophile. Alkyne and maleimide functionalized poly(ethylene glycol) (PEG) were synthesized by esterification of monomethoxy PEG. PtBA-b-PMMA-b-PtBA and PtBA-b-PS-b-PtBA were successfully prepared in a one-pot reaction at ambient temperature combining photoinduced and thermal Diels-Alder reactions. ABC triblock copolymers (PtBA-b-PS-b-PEG) with narrow polydispersities were obtained via the combination of photoinduced Diels-Alder reactions with thermal Diels Alder reactions as well as CuAAc chemistry. The polymers were characterized by size exclusion chromatography and H-1 NMR spectroscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据