Synthesis of Poly(ethylene-block-vinylalcohol)for Use as Amphiphilic Film Surface at High Temperature
この論文をさがす
抄録
Poly (ethylene-block-vinyl alcohol), which consisted of both hydrophobic and hydrophilic blocks, was prepared by using polyethylene single crystals as starting material. Polyethylene single crystals reacted with fuming nitric acid resulting in long methylene chains with functional groups such as COOH and NO(2) at the ends (the chain length were almost same as the lamellar thickness of polyethylene single crystal). The functionalized methylene chains were allowed to react with 4-aminostyrene to give corresponding amides, i.e., methylene chains with vinyl groups at the ends (macromer). The macromers were extended by block-copolymerization with vinyl acetate, then saponified resulting in PE/PVA block co-polymer. The block copolymer was molded into sheets which were subsequently heat-treated in contact with hydrophilic or hydrophobic media. Depending on the media, the sheet surface changed at high temperature reversibly from hydrophilic to hydrophobic and vice versa. The surface property was fixed by quenching because both blocks were able to crystallize. Thus the surface of this material can be tailored for various purposes at high temperature, and then used in stable at room temperature.
収録刊行物
-
- Memoirs of the Faculty of Engineering, Okayama University
-
Memoirs of the Faculty of Engineering, Okayama University 35 (1-2), 29-34, 2001-03-27
Faculty of Engineering, Okayama University
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390290699562015360
-
- NII論文ID
- 120002307155
-
- NII書誌ID
- AA10699856
-
- ISSN
- 04750071
-
- DOI
- 10.18926/15350
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- IRDB
- CiNii Articles