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Synthesis of asymmetric H-shaped block copolymer by the combination of atom transfer radical polymerization and living anionic polymerization |
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| Authors: | Xifei Yu Tongfei Shi Lijia An |
| Affiliation: | a State Key Laboratory of Polymer Physics and Chemistry, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, Changchun 130022, People's Republic of China b Ministry of Education Key Laboratory of Automobile Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China |
| Abstract: | A new asymmetric H-shaped block copolymer (PS)2-PEO-(PMMA)2 has been designed and successfully synthesized by the combination of atom transfer radical polymerization and living anionic polymerization. The synthesized 2,2-dichloro acetate-ethylene glycol (DCAG) was used to initiate the polymerization of styrene by ATRP to yield a symmetric homopolymer (Cl-PS)2-CHCOOCH2CH2OH with an active hydroxyl group. The chlorine was removed to yield the (PS)2-CHCOOCH2CH2OH ((PS)2-OH). The hydroxyl group of the (PS)2-OH, which is an active species of the living anionic polymerization, was used to initiate ethylene oxide by living anionic polymerization via DPMK to yield (PS)2-PEO-OH. The (PS)2-PEO-OH was reacted with the 2,2-dichloro acetyl chloride to yield (PS)2-PEO-OCCHCl2 ((PS)2-PEO-DCA). The asymmetric H-shaped block polymer (PS)2-PEO-(PMMA)2 was prepared via ATRP of MMA at 130 °C using (PS)2-PEO-DCA as initiator and CuCl/bPy as the catalyst system. The architectures of the asymmetric H-shaped block copolymers, (PS)2-PEO-(PMMA)2, were confirmed by 1H NMR, GPC and FT-IR. |
| Keywords: | Atom transfer radical polymerization Living anionic polymerization Asymmetric H-shaped block copolymer |
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