Lipase-catalyzed ring-opening copolymerization of ω-pentadecalactone and δ-valerolactone by reactive extrusion

2020 ◽  
Vol 22 (3) ◽  
pp. 662-668
Author(s):  
Changcun Li ◽  
Shuaijun Pan ◽  
Weijian Xu ◽  
Yanbing Lu ◽  
Peipei Wang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Reactive Extrusion ◽  
Novozyme 435

This work demonstrates the synthesis of poly(ω-pentadecalactone-co-δ-valeroLactone) with high molecular weight (Mn = 71.3 kDa) and low polydispersity (Đ = 1.67) within 6 hours by reactive extrusion (REX) using a lipase catalyst (Novozyme-435).

Enzymatic reactive extrusion: moving towards continuous enzyme-catalysed polyester polymerisation and processing

2015 ◽  
Vol 17 (8) ◽  
pp. 4146-4150 ◽  
Author(s):  
S. Spinella ◽  
M. Ganesh ◽  
G. Lo Re ◽  
S. Zhang ◽  
J.-M. Raquez ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Reactive Extrusion

Enzyme catalysed ring-opening polymerisation was performed by reactive extrusion gave high molecular weight polyester (Mw ≥ 163 000 g mol−1) in 15 minutes.

Catalytic Ring-Opening Polymerization of Renewable Macrolactones to High Molecular Weight Polyethylene-like Polymers

2011 ◽  
Vol 44 (11) ◽  
pp. 4301-4305 ◽  
Author(s):  
Inge van der Meulen ◽  
Erik Gubbels ◽  
Saskia Huijser ◽  
Rafaël Sablong ◽  
Cor E. Koning ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Ring Opening Polymerization

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 371-381 ◽  
Author(s):  
Ian Manners
Keyword(s):  
Molecular Weight ◽  
Transition Metal ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Organometallic Polymer ◽  
Wide Range ◽  
Initial Discovery

Ring-opening polymerization (ROP) of strained ring-tilted metallocenophanes can be achieved thermally, via anionic or cationic initiation, or by the use of transition-metal catalysts and provides access to a wide range of high molecular weight (Mw = 105-106, Mn > 105) poly(metallocenes). These materials possess a variety of interesting properties and many are very easy to prepare. This article provides an overview of our work, giving background to and an account of the initial discovery, and discusses work on the synthesis and properties of new poly(metallocenes) and related materials with particular emphasis on recent research directions.Key words: metallocene, ring-opening polymerization, ferrocenophane, organometallic polymer.

Solvent-assisted anionic ring opening polymerization of glycidol: Toward medium and high molecular weight hyperbranched polyglycerols

2013 ◽  
Vol 51 (12) ◽  
pp. 2614-2621 ◽  
Author(s):  
Muhammad Imran ul-haq ◽  
Rajesh A. Shenoi ◽  
Donald E. Brooks ◽  
Jayachandran N. Kizhakkedathu
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Anionic Ring
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