2017年4月
Synthesis of diblock copolymers consisting of POSS-containing random methacrylate copolymers and polystyrene and their cross-linked microphase-separated structure via fluoride ion-mediated cage scrambling
POLYMER CHEMISTRY
- ,
- ,
- 巻
- 8
- 号
- 16
- 開始ページ
- 2516
- 終了ページ
- 2527
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/c6py02236g
- 出版者・発行元
- ROYAL SOC CHEMISTRY
Synthesis of a series of diblock copolymers consisting of POSS-containing random methacrylate copolymers and polystyrene (P(MAPOSS-r-methyl methacrylate)-b-polystyrene etc.) has been established by reversible addition-fragmentation chain-transfer (RAFT) polymerisation. The polymerisation of styrene as the second block was well controlled when POSS-containing random copolymers were used as the chain transfer agent (CTA). Dynamic cross-linking of POSS-containing block copolymers, which utilized a cage scrambling reaction among pendant POSS units mediated by a fluoride ion, was achieved by evaporating the solvent from a solution of block copolymers tetrabutylammonium fluoride (TBAF) and 1,4-bis (triethoxysilyl) benzene (BTSB) in THF. During the solvent evaporation and thermal annealing that provided cross-linked polymer films, a phase-separated structure was formed. The microphase-separated structure of the cross-linked block copolymers showed the cylindrical morphology of the POSS-containing blocks, which was proved by small angle X-ray scattering (SAXS) measurements and transmission electron microscopy (TEM) observations. A clear microphase-separated structure was obtained when a larger amount of fluoride ions was used for cage scrambling. The morphology was maintained even after immersing in tetrahydrofuran, indicating that the phase-separated structure was completely immobilized by cross-linking.
- リンク情報
- ID情報
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- DOI : 10.1039/c6py02236g
- ISSN : 1759-9954
- eISSN : 1759-9962
- ORCIDのPut Code : 31782722
- Web of Science ID : WOS:000399722400012