Synthesis of styrene and tetrahydrofuran block copolymers by in situ transformation |
| |
| Authors: | LIU Yanfei WAN Xiaolong YING Shengkang |
| |
| Institution: | Laboratory of Living Polymerization, East China University of Science and Technology, Shanghai 200237, China,Laboratory of Living Polymerization, East China University of Science and Technology, Shanghai 200237, China,Laboratory of Living Polymerization, East China University of Science and Technology, Shanghai 200237, China |
| |
| Abstract: | In order to transfer the halogen terminus of polymers for block copolymer synthesis, the in situ transformation of living free radical polymerization of styrene into living cationic ring-opening polymerization of tetrahydrofuran was successfully performed. Three different initiator/catalyst systems of styrene were employed, i.e. (a) PhCH2Cl/ Bpy/CuCl, (b) 1-PEBr/Bpy/CuCl and (c) CCL/BDE/CuCl system. With these monofunctional initiator or difunction-al initiator, both AB and ABA type block copolymers of styrene and tetrahydrofuran were obtained using a silver salt with strong acid (AgC104) as the transformation agent in the transformation of polymerization type. Characterization of these copolymers by nuclear magnetic resonance hydrogen spectra ('H-NMR) , gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) indicated this method is simple and feasible. |
| |
| Keywords: | living free radical polymerization ring-opening polymerization synthesis poly (styrene-b-tetrahydrofuran) block copolymer |
|
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
|
