Synthesis of block copolymer with photo-decomposable polyurethane and its photo-initiated domino decomposition
| Autor: | Atsushi Kameyama, Yukie Takeda, Yoshihito Ishida |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Condensation polymer
Materials science Polymers and Plastics Decarboxylation General Chemical Engineering Radical polymerization 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound chemistry Cascade reaction Reagent Polymer chemistry Materials Chemistry Copolymer Environmental Chemistry Methyl methacrylate 0210 nano-technology Polyurethane |
| Zdroj: | Reactive and Functional Polymers. 107:20-27 |
| ISSN: | 1381-5148 |
| Popis: | A block copolymer consisting of a photo-decomposable polyurethane and poly(methyl methacrylate) (PMMA) was developed. The end-functionalized polyurethane (P2) was synthesized by polycondensation with the end-functionalization reagents. P2 possesses the photosensitive o-nitrobenzyl group and the 2-bromoisobutyryl group as the initiator of the atom transfer radical polymerization (ATRP). The block copolymer (P2-b-PMMA) was synthesized by the ATRP of methyl methacrylate (MMA) with P2 as the macroinitiator. The P2 block in P2-b-PMMA was decomposed by photo-irradiation at 365 nm by the initiation of the photo-fries rearrangement of the urethane linkage and the subsequent domino reaction consistent with the elimination of the aza-quinone methide and decarboxylation. The photo-initiated decomposition of the P2 segment in the thin-film state was accomplished. |
| Databáze: | OpenAIRE |
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