Makale detayı · 2012
2 Isopropenyl 2 oxazoline A Versatile Monomer for Functionalization of Polymers Obtained via RAFT
- Yıl
- 2012
- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- YÖKSİS dergi adı MACROMOLECULES
- Katalog eşleşmesi (ISSN) Macromolecules
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
OpenAlex · İngilizce
2-Isopropenyl-2-oxazoline ( i POx) was polymerized for the first time via a controlled radical polymerization technique. Reversible addition–fragmentation chain transfer (RAFT) polymerization utilizing a dithiobenzoate-based chain transfer agent was employed to form a backbone that is highly reactive toward thiols and acids. Moreover, the statistical copolymerization of i POx with methyl methacrylate (MMA) and N - iso -propylacrylamide (N i PAm) was investigated resulting in two copolymer series with i POx content varying from 100% to 13% (PDI = 1.37 to 1.21). The P( i POx- stat -N i PAm) copolymers displayed thermoresponsive behavior in water as well as phosphate buffered saline at higher temperatures in comparison to homopolymers of N i PAm due to the hydrophilicity of the introduced i POx moieties ( T cp = 25 to 75 °C). Futhermore, i POx-based (co)polymers were functionalized by polymer analogous addition reactions with thiophenol, benzoic acid and 4-azidobenzoic acid in high conversions (74–100%). The latter adduct represented a suitable building block for the synthesis of a graft copolymer consisting of a PMMA backbone and poly(2-ethyl-2-oxazoline) (PEtOx) side chains via copper-catalyzed azide–alkyne cycloaddition (CuAAC) of PEtOx with alkyne terminus.
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