naa a22 4500 51082000X CHVBK 20180411083526.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11814-012-0183-0 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0183-0 Contribution of the solid phase polymerization to the molecular weight distribution in acrylonitrile precipitation copolymerization [Elektronische Daten] [Shuang Zhang, Wei Liu, Hui Zhang, Seung Ryu, Ri Jin] Molecular weight distribution of copolyacrylonitrile, which was obtained from precipitation copolymerization without and with using dispersants in mixed solution, is studied. The contribution ratio of liquid phase polymerization and solid phase polymerization under different polymerization conditions could be worked out through the formula, which has been deduced in literature. From the calculated results, common points of each reaction system are, i) contribution ratio (r) of solid phase to liquid phase decreases with the increase of water content; thus the solid phase polymerization is gradually strengthened, which is apt to form chain of high molecular weight, ii) the higher temperature leads to higher compatibility between water and DMSO; thus the solid phase polymerization contribution would decrease, while the value of r is considerably larger. The limit molecular weight distribution of the system without dispersants in 100% water is approaching to 2; thus the corresponding r becomes larger, the molecular weight distribution ratio (Q) decreases in the system with dispersants. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Molecular Weight Distribution nationallicence Polyacrylonitrile nationallicence Precipitation Polymerization nationallicence Contribution Ratio of Liquid Phase and Solid Phase Polymerization nationallicence Zhang Shuang State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut Liu Wei State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut Zhang Hui State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut Ryu Seung Jeonju Institute of Machinery and Carbon Composites, 561-844, Jeonju-si, Korea aut Jin Ri State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 746-750 0256-1115 30:3<746 2013 30 11814 https://doi.org/10.1007/s11814-012-0183-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0183-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Shuang State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut NATIONALLICENCE 700 1- Liu Wei State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut NATIONALLICENCE 700 1- Zhang Hui State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut NATIONALLICENCE 700 1- Ryu Seung Jeonju Institute of Machinery and Carbon Composites, 561-844, Jeonju-si, Korea aut NATIONALLICENCE 700 1- Jin Ri State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 10029, Beijing, China aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 746-750 0256-1115 30:3<746 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer