caa a22 4500 465788610 CHVBK 20180323112016.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF00338492 doi (NATIONALLICENCE)springer-10.1007/BF00338492 Sequence-regulated oligomers and polymers by living cationic polymerization [Elektronische Daten] 1.Synthesis of sequence-regulated trimers and tetramers of functional vinyl ethers [Masahiko Minoda, Mitsuo Sawamoto, Toshinobu Higashimura] Summary: A new trimer (3) and a tetramer (4) of vinyl ethers with controlled repeat unit sequences were prepared through the living cationic polymerization initiated with the hydrogen iodide/zinc iodide (HI/ZnI2) system in toluene at 40°C; for example, 4 consisted of the following sequence, H−CH2CH(OnBu)−CH2CH[OCH2CH2CH(COOEt)2]−CH2CH(OCH2CH2OCOC6H5)−CH2CH[OCH2CH2−OCOC(CH3)=CH2]−OCH3, and is a new methacrylate-type macromonomer. The synthesis involved sequential and successive reactions of the corresponding four vinyl ethers (each equimolar to hydrogen iodide) with the HI/ZnI2-generated living oligomeric growing species, starting from the quantitative addition of hydrogen iodide to n-butyl vinyl ether and subsequent activation of the resulting adduct with ZnI2. The structure and molecular weights of these sequence-regulated vinyl ether oligomers were verified by 1H NMR and thermospray mass spectroscopy. Springer-Verlag, 1990 Minoda Masahiko 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), 133-139 0170-0839 23:2<133 1990 23 289 https://doi.org/10.1007/BF00338492 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00338492 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Minoda Masahiko 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), 133-139 0170-0839 23:2<133 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer