%0 Journal Article
%T Lipase-catalyzed Continuous Ring-opening Polymerization of 汍-Caprolactone in a Packed-bed Reactor
%A Lin
%A J. P.
%A Su
%A E. Z.
%A Wei
%A D. Z.
%A Zhang
%A M. J.
%J -
%D 2012
%X Saˋetak A packed-bed reactor (PBR) system was developed for continuous lipase-catalyzed ring-opening polymerization of -caprolactone (汍-CL). The parameters affecting the poly(汍-caprolactone) (PCL) production in the PBR such as residence time, height to diameter (H/D) ratio, and monomer feed concentration were investigated. Monomer conversion of 汍-CL increased with the increase of residence time, reached the highest (over 98 %) at the residence time of 12 min. And under this residence time it would almost not change even if the H/D ratio varied from 4 to 20 or the monomer concentration varied from 0.2 to 2.25 mol L每1. The number-average molecular mass (Mn) of PCL did not change in agreement with the monomer conversion, and approached the maximal values of 15600 g mol每1 with polydispersity index (PDI) of 2.1 under 20 min residence time, 12.0 H/D ratio and 1.75 mol L每1 monomer concentration. The Mn of PCL maintained around 15600 g mol每1 without appreciable loss during the long-term operation of 460 h with the PCL productivity of 19.15 g g每1 enzyme d每1)
%K Packed-bed reactor (PBR)
%K lipase
%K ring-opening polymerization
%K poly(汍-caprolactone)
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=117894