期刊
POLYMER CHEMISTRY
卷 13, 期 30, 页码 4436-4445出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2py00649a
关键词
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资金
- ARC Future Fellowship from the Australian Research Council (ARC) [FT190100572]
- Alexander von Humboldt Foundation (Feodor-Lynen fellowship)
- Monash Graduate Scholarship
This study explores the application of a new initiator in polymer synthesis. The results show that this initiator can achieve a higher degree of control over the polymerization process under irradiation, resulting in well-defined polymers. In addition, tailored amine-based polymers can be prepared by using different terminating agents.
Polymers bearing amine moieties are highly valuable for their ability to conjugate and/or complex a variety of molecules. However, their incorporation into synthetic macromolecules remains challenging. Poly(2-oxazolines) (POx) are a highly functional class of polymers, which through the choice of polymerization components or post-polymerization modifications, can be furnished with a large range of functional groups. Here, we explored their potential for the preparation of alpha-amine telechelic macromolecules through a comprehensive comparison of different amine-containing cationic ring-opening polymerization (CROP) initiators comprised of the amine protecting groups tert-butyloxycarbonyl (BOC) and phthalimide and the counterions tosylate (Tos) and bromide (Br). Polymerization kinetics of 2-ethyl-2-oxazoline (EtOx) and stability tests revealed the commercially available phthalimide-NH2-C3-Br as the most suitable initiator for achieving the highest degree of control over the polymerization. The polymerization initiated by this new initiator at 140 degrees C under microwave irradiation was characterized by a stable protected amine group, and fast initiation, and delivered well-defined poly(2-ethyl-2-oxazoline)s (PEtOx). alpha-Amine telechelic PEtOx were subsequently synthesized using different terminating agents, enabling the future preparation of tailored aminated POx-based architectures.
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