1996 Fiscal Year Final Research Report Summary
New Polymer Synthesis by Radical/ion Transformation Polymerization
| Project/Area Number |
07455375
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
高分子合成
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
KAMACHI Mikiharu Osaka University Graduate School of Science, Professor, 大学院・理学研究科, 教授 (40028163)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KAJIWARA Atsusi Osaka University Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (50224415)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Keywords | Radical / ion transformation polymerisation / Electron transfer Reaction / Cationic Poolymersation / Block Copolymerisation / Block Polymer / Electron Acceptor / Transformation of Active Spicies / Propagating Radical |
|---|
| Research Abstract |
p-Methoxystirene (MOS), n-butyl vinyl ether (BVE), and N-vinylcarbazole (VCZ) were polymerized in high yield by azoinitiators such as AIBN in the presence of electron acceptors such as Ph_2I^+PF_6^-. ESR study of the model radicals of the growing ends and the propagating radical showed the transformation of the radical to the corresponding cation in the presence of the electron acceptors. In the case of BVE,the polymer formation was caused by cationic species produced by the transformation of initiating radical. The polymerizations of MOS and VCZ were ascribed to the transformation of the growing radical to the corresponding cation during the propagation step which was classified as the radical/cation transformation polymerization. Block copolymers of MOS/cyclohexene oxide (CHO) and VCZ/CHO were effectively prepared by the radical/cation transformation polymerization of MOS and VCZ,respectively, with AIBN in the presence of electron acceptor and CHO.The formation of block copolymers was characterized by turbidmetry, thin-layr chromatography, and solubility test.
|
