Synthesis of polymethylene-b-poly(vinyl acetate) block copolymer via visible light induced radical polymerization and its application
| Autor: | Tao Jiang, Fang Xu, Qiao-Ling Zhao, Zhi Ma, Kun Cui, HeYing Wang, Hao Zhang, Jin Huang |
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| Rok vydání: | 2017 |
| Předmět: |
General Chemical Engineering
Radical polymerization 02 engineering and technology General Chemistry Borane 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Micelle 0104 chemical sciences chemistry.chemical_compound chemistry Polymerization Polymer chemistry Copolymer Vinyl acetate Molar mass distribution 0210 nano-technology Catecholborane |
| Zdroj: | RSC Advances. 7:42484-42490 |
| ISSN: | 2046-2069 |
| Popis: | New well-defined amphiphilic polymethylene-b-poly(vinyl acetate) (PM-b-PVAc) diblock copolymers were synthesized via a tandem strategy combining polyhomologation of ylides, chain-end functionalization and a visible light induced degenerative iodine transfer polymerization using decacarbonyldimanganese (Mn2(CO)10). Firstly, an iodo terminated polymethylene (PM-I) was prepared by polyhomologation of ylides initiated by a new organic borane based on catecholborane followed by functional group transformation using iodine as the end-capping reagent. Then, a series of amphiphilic PM-b-PVAc diblock copolymers with controlled molecular weight (Mn = 5530–17 020 g mol−1) and relatively narrow molecular weight distribution (Đ = 1.31–1.45) were obtained efficiently through a visible light induced degenerative iodine transfer polymerization of vinyl acetate (VAc) using PM-I as macroinitiator in the presence of Mn2(CO)10 under weak visible light irradiation at 40 °C. The micelles of such an amphiphilic diblock copolymer formed in tetrahydrofuran were observed by transmission electron microscopy (TEM). Moreover, the fabrication of porous films using PM-b-PVAc diblock copolymers via a static breath-figure process was investigated. |
| Databáze: | OpenAIRE |
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