caa a22 4500 465787576 CHVBK 20180323112013.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00297318 doi (NATIONALLICENCE)springer-10.1007/BF00297318 Living cationic polymerization of styrene by the 1-phenylethyl chloride/tin tetrachloride initiating system in the presence of tetra-n-butylammonium chloride [Elektronische Daten] [Yoshiyuki Ishihama, Mitsuo Sawamoto, Toshinobu Higashimura] Summary: An initiating system, consisting of 1-phenylethyl chloride, tin tetrachloride, and tetra-n-butylammonium chloride [CH3CH(Ph)C1/SnCl4/nBu4NCl], led to living cationic polymerization of styrene in CH2Cl2 solvent at-15°C; typically, CH3CH(Ph)Cl/SnCl4/nBu4NCl=20/100/40 mM for 1.0 M of styrene. The living nature of the process was confirmed by an increase in the number-average molecular weight ( $$\bar M_n $$ ) of the polymers in direct proportion to monomer conversion and its continuation on supplying a fresh feed of styrene after the polymerization; the observed $$\bar M_n $$ was close to the calculated value assuming that one molecule of CH3CH(Ph)Cl yields one living polymer. Throughout these reactions, the polymer's molecular weight distribution (MWD) stayed very narrow ( $$\bar M_w /\bar M_n \leqslant 1.1$$ ), though slightly broadening after the second monomer addition. In the absence of nBu4NCl, the CH3CH(Ph)Cl/SnCl4 system yielded polystyrene with a bimodal MWD where the lower polymer fraction alone was apparently of a long lifetime. Styrene polymerization with the H2O/SnCl4 system was also examined, both with and without added nBu4NCl, and a long-lived propagating species was obtained in the presence of nBu4NCl. Springer-Verlag, 1990 Ishihama Yoshiyuki 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 24/2(1990-08-01), 201-206 0170-0839 24:2<201 1990 24 289 https://doi.org/10.1007/BF00297318 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00297318 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ishihama Yoshiyuki 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 24/2(1990-08-01), 201-206 0170-0839 24:2<201 1990 24 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465787576 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer