期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 220, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201900317
关键词
block copolymers; copper(I)-catalyzed azide-alkyne cycloaddition; dense 1; 2; 3-triazole blocks; poly(ethylene glycol); self-association behavior
资金
- Sasakawa Scientific Research Grant from the Japan Science Society [2018-3035]
- JSPS Kakenhi [JP26288061]
In this work, new diblock copolymers of poly(ethylene glycol) (PEG) and dense 1,2,3-triazole blocks (EGm-b-APn and EGm-b-ABn, where m and n denote the degrees of polymerization), are synthesized by copper(I)-catalyzed azide-alkyne cycloaddition polymerization of 3-azido-1-propyne (AP) and 3-azido-1-butyne (AB), respectively, in the presence of PEG possessing a propargyl group. Their self-association behavior and thermoresponsive property in water are investigated. The characterization data indicate that EG45-b-AP6 and EG45-b-AP14 form dominantly spherical micelles, EG18-b-AP4 and EG18-b-AP10 form vesicles, and EG18-b-AB7 forms rodlike micelles. Aqueous solutions of EG18-b-AP10, EG45-b-AP14, and EG18-b-AB7 undergo lower critical solution temperature (LCST)-type phase separation. The thermoresponsive association behavior can be controlled by adjusting the ratio of block lengths and by attaching methyl substituents.
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