نتایج جستجو برای: ring opening polymerization

تعداد نتایج: 195988  

Journal: :Dalton transactions 2011
Wenyi Li Wenting Wu Yaorong Wang Yingming Yao Yong Zhang Qi Shen

Two dinuclear aluminum alkyl complexes supported by a piperazidine-bridged bis(phenolato) group were prepared, and both complexes exhibited extremely high activity for the ring-opening polymerization of ε-caprolactone. In the presence of benzyl alcohol (BnOH), the polymerization accelerated dramatically.

This investigation indicates the ability to selectively graft glycidyl methacrylate (GMA) only from the external surface of regenerated cellulose (RC) ultrafiltration (UF) membranes using activator generated electron transfer (AGET) atom transfer radical polymerization (ATRP). This controlled polymerization resulted in epoxy functionalized polymer brush ends. Further reaction of the terminal ep...

Journal: :Molecules 2015
Jacques Lalevée Haifaa Mokbel Jean-Pierre Fouassier

Photoinitiators (PI) or photoinitiating systems (PIS) usable in light induced cationic polymerization (CP) and free radical promoted cationic polymerization (FRPCP) reactions (more specifically for cationic ring opening polymerization (ROP)) together with the involved mechanisms are briefly reviewed. The recent developments of novel two- and three-component PISs for CP and FRPCP upon exposure t...

2014
Carrie R. James Anthony M. Rush Thomas Insley Lela Vuković Lisa Adamiak Petr Král Nathan C. Gianneschi

Here we report the preparation of poly(oligonucleotide) brush polymers and amphiphilic brush copolymers from nucleic acid monomers via graft-through polymerization. We describe the polymerization of PNA-norbornyl monomers to yield poly-PNA (poly(peptide nucleic acid)) via ring-opening metathesis polymerization (ROMP) with the initiator, (IMesH2)(C5H5N)2(Cl)2RuCHPh.1 In addition, we present the ...

Journal: :Chemical communications 2010
Sebastijan Kovačič Peter Krajnc Christian Slugovc

A simple formulation of a stable high internal phase emulsion of dicyclopentadiene which is cured by using properly selected ring opening metathesis polymerization initiators yields highly porous monolithic materials with paramount mechanical properties and the possibility of easy functionalisation.

Journal: :Chemical communications 2003
Malcolm H Chisholm Judith Gallucci Khamphee Phomphrai

Amide and alkoxide coordination complexes of calcium supported by beta-diiminato and bulky trispyrazolylborate complexes are reported together with their activity in lactide ring-opening polymerization; some are amongst the most active systems discovered to date.

Journal: :Chemical communications 2011
Ben J Jeffery Emma L Whitelaw Daniel Garcia-Vivo Joseph A Stewart Mary F Mahon Matthew G Davidson Matthew D Jones

In this paper we demonstrate the utility of Group 4 metals for the well-controlled and stereoselective (syndiotactic) ring opening polymerization (ROP) of rac-β-butyrolactone (BBL) and their ability to form copolymers.

Journal: :Chemical communications 2012
Olivier Coulembier Thomas Josse Brieuc Guillerm Pascal Gerbaux Philippe Dubois

The design of an imidazole-based salt by enzyme-mimicking allowed controlling the ring-opening polymerization of L- and D-LA monomers in bulk. Kinetic study supports a bifunctional activation process only slightly different from the one occurring in Nature.

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