文献类型：期刊文献

中文题名：Synthesis of styrene and tetrahydrofuran block copolymers by in situ transformation

英文题名：Synthesis of styrene and tetrahydrofuran block copolymers by in situ transformation

作者：Liu, Yanfei[1]; Wan, Xiaolong[1]; Ying, Shengkang[1]

机构：[1]E China Univ Sci & Technol, Lab Living Polymerizat, Shanghai 200237, Peoples R China

年份：2000

卷号：10

期号：2

起止页码：117

中文期刊名：Progress in Natural Science:Materials International

外文期刊名：PROGRESS IN NATURAL SCIENCE

收录：;EI(收录号：2005509556192);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000088688400005)】；

基金：Project supported by the National Natural Science Foundation of China (Granted No. 29630410-2).

语种：英文

中文关键词：living;free;radical;polymerization;ring-opening;polymerization;synthesis;poly;(styrene-b-tetrahydrofuran);block;copolymer.

外文关键词：living free radical polymerization; ring-opening polymerization; synthesis poly (styrene-b-tetrahydrofuran); block copolymer

摘要：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) CCU/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 (AgClO4) as the transformation agent in the transformation of polymerization type. Characterization of these copolymers by nuclear magnetic resonance hydrogen spectra (1H-NMR) , gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) indicated this method is simple and feasible.
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) CCl4/BDE/CuCl system. With these monofunctional initiator or difunctional initiator, both AB and ABA type block copolymers of styrene and tetrahydrofuran were obtained using a silver salt with strong acid (AgClO4) as the transformation agent in the transformation of polymerization type. Characterization of these copolymers by nuclear magnetic resonance hydrogen spectra (H-1-NMR), gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) indicated this method is simple and feasible.