Lipase-Catalyzed Ring-Opening Polymerization and Copolymerization of β-Propiolactone
نویسندگان
چکیده
منابع مشابه
Lipase-catalyzed ring-opening copolymerization of ε-caprolactone and β-lactam.
The enzymatic ring-opening copolymerization of ε-caprolactone (ε-CL) and β-lactam by using Candida antarctica lipase B (CAL-B) as catalyst was studied. Variation of the feed ratios of 25:75, 50:50, and 75:25 of ε-CL/β-lactam was performed. The products contain poly(ε-CL-co-β-lactam) and the homopolymers of poly(ε-CL) and poly(β-lactam). The structure of the copolymers was determined by MALDI-To...
متن کاملLipase-catalyzed Continuous Ring-opening Polymerization ofe-Caprolactone in a Packed-bed Reactor
A packed-bed reactor (PBR) system was developed for continuous lipase-catalyzed ring-opening polymerization of -caprolactone ( -CL). The parameters affecting the poly( -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 -CL increased with the increase of residence time, reached...
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A family of chiral zinc amido-oxazolinate complexes are shown to be highly active and isoselective initiators for the ring-opening polymerization (ROP) of rac-lactide, yielding isotactic stereoblock polylactides (PLA) with Pm up to 0.91. This represents the highest isoselectivity observed with zinc-based catalysts for ROP of rac-lactide.
متن کاملOrganocatalytic ring-opening polymerization.
Modern synthetic methods have revolutionized polymer chemistry through the development of new and powerful strategies for the controlled synthesis of complex polymer architectures.1-5 Many of these developments were spawned by new classes of transition metal catalysts for the synthesis of new polyolefin microstructures,5 the design of highly efficient families of “living” polymerization strateg...
متن کاملCatalysts for CO2/epoxide ring-opening copolymerization
This article summarizes and reviews recent progress in the development of catalysts for the ring-opening copolymerization of carbon dioxide and epoxides. The copolymerization is an interesting method to add value to carbon dioxide, including from waste sources, and to reduce pollution associated with commodity polymer manufacture. The selection of the catalyst is of critical importance to contr...
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ژورنال
عنوان ژورنال: Polymer Journal
سال: 1996
ISSN: 0032-3896,1349-0540
DOI: 10.1295/polymj.28.730