caa a22 4500 465788556 CHVBK 20180323112016.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00338494 doi (NATIONALLICENCE)springer-10.1007/BF00338494 Synthesis of block copolymers of p -methoxystyrene and vinyl ethers by the hydrogen iodide/zinc iodide initiating system [Elektronische Daten] [Kazushige Kojima, Mitsuo Sawamoto, Toshinobu Higashimura] Summary: Amphiphilic or polar-nonpolar AB block copolymers of p-methoxystyrene (pMOS) and vinyl ethers (VE; methyl or isobutyl) were synthesized by the sequential living cationic polymerization initiated with the hydrogen iodide/zinc iodide (HI/ZnI2) system in toluene at -15 and +25 °C. pMOS-VE block copolymers of narrow molecular weight distributions ( $$\overline M _w /\overline M _n $$ = 1.05−1.25; $$\overline {\text{M}} _n $$ = 6000−16000) were obtained in nearly quantitative blocking efficiency, when methyl or isobutyl VE was polymerized first by HI/ZnI2, followed by addition of pMOS to the resulting living polymer solutions; an additional amount of ZnI2 was required to accelerate the second-phase living polymerization of the less reactive styrenic monomer. Similar block polymerizations in an opposite monomer-addition sequence (from pMOS to VE), in contrast, resulted in mixtures of the desired block polymer and homopolymer of pMOS. Springer-Verlag, 1990 Kojima Kazushige Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut Sawamoto Mitsuo Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut Higashimura Toshinobu Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut Polymer Bulletin Springer-Verlag 23/2(1990-02-01), 149-156 0170-0839 23:2<149 1990 23 289 https://doi.org/10.1007/BF00338494 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00338494 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kojima Kazushige Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut NATIONALLICENCE 700 1- Sawamoto Mitsuo Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut NATIONALLICENCE 700 1- Higashimura Toshinobu Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, 606, Kyoto, Japan aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/2(1990-02-01), 149-156 0170-0839 23:2<149 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer