caa a22 4500 465788483 CHVBK 20180323112016.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF00419976 doi (NATIONALLICENCE)springer-10.1007/BF00419976 Studies on the molecular weight dependence of tacticity of anionically prepared PMMAs by on-line GPC/NMR [Elektronische Daten] [Koichi Hatada, Koichi Ute, Tatsuki Kitayama, Tohru Nishimura, Masaharu Kashiyama, Nobutaka Fujimoto] Summary: Several PMMA samples prepared in toluene with anionic initiators such as t-C4H9MgBr, n-C4H9MgCl, 1,1-diphenylhexyllithium, t-C4H9Li and t-C4H9Li(n−C4H9)3Al complex were analyzed by the on-line GPC/NMR method using a 500 MHz 1H NMR spectrometer as a real-time detector of GPC. The molecular method for a short time (≤60 min per sample) with a small amount of the sample (≈1 mg). The plots of intensities of the α-methyl proton resonances due to mm- and rr-triads against elution time showed the variation of tacticity with molecular weight of the PMMA. On the basis of the results, the natures of active species in the polymerizations were discussed. Springer-Verlag, 1990 Hatada Koichi Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Ute Koichi Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Kitayama Tatsuki Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Nishimura Tohru Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Kashiyama Masaharu Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Fujimoto Nobutaka Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut Polymer Bulletin Springer-Verlag 23/5(1990-05-01), 549-554 0170-0839 23:5<549 1990 23 289 https://doi.org/10.1007/BF00419976 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00419976 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hatada Koichi Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Ute Koichi Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Kitayama Tatsuki Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Nishimura Tohru Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Kashiyama Masaharu Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Fujimoto Nobutaka Department of Chemistry, Faculty of Engineering Science, Osaka University, 560, Toyonaka, Osaka, Japan aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/5(1990-05-01), 549-554 0170-0839 23:5<549 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer