Coordination polymerisation and ring opening polymerisation (ROP) for
The synthesis and ring opening polymerisation of novel cyclic esters from malic acid
... initial ring-opening of 6 occurring with neo-pentanol however, the increased rate of initiation of neo- pentanol with respect to 2-propanol and relative propagation rates of the more activated PBMD ...
280
Monomeric Ti(IV) homopiperazine complexes and their exploitation for the ring opening polymerisation of rac-lactide
... controlled polymerisation of rac -lactide can lead to either atactic, heterotactic or iso- tactic PLA the later possessing a significantly higher melt- ing ...the polymerisation of rac- lactide is shown in ...
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Catalyst and monomer design : targeting polymer properties via organic catalysed ring opening polymerisation
... quantitative polymerisation of LA (DP70) within 50 ...slower polymerisation rates, but transesterification is also suppressed due to this lower active NHC ...
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Towards sequence controlled functional polyesters : advances in the ring opening (co)polymerisation of large ring and Σ subsituted lactones
... catalyse polymerisation at high monomer concentrations, when equilibrium favours the polymerisation ...catalyse polymerisation are very dependent on factors such as high monomer concentration to ...
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Vanadium(v) phenolate complexes for ring opening homo- and co-polymerisation of ε-caprolactone, L-lactide and rac-lactide
... in polymerisation catalysis is ...olen polymerisation, 4 but their use in the ROP of lactides and lactones, particularly that of the tri- and tetra- phenolic ligand sets, is rather ...
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Synthesis and post polymerisation functionalisation of aliphatic poly(carbonate)s
... 2.2. Results and Discussion 2.2.1. Synthesis of 5-methyl-5-allyloxycarbonyl-1,3-dioxan-2-one, MAC. Owing to the electrophilic nature of allyl bromide, 5-methyl-5- allyloxycarbonyl-1,3-dioxan-2-one (MAC) was able to be ...
304
The synthesis and ring opening polymerisation of functionalised chiral O carboxyanhydrides and cyclic carbonates
... 114 showed the complete loss of the epoxide signals from the 1 H NMR spectrum, presumably as a result of the acid-sensitivity of the epoxide functionality. The monomer was finally successfully dried under a static vacuum ...
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Ring opening metathesis polymerisation of a new bio-derived monomer from itaconic anhydride and furfuryl alcohol
... Presently it is not known whether the esterification reaction precedes the Diels–Alder cycloaddition, yielding intermediate 3b , or whether the Diels–Alder cycloaddition occurs first, giving intermediate 4 , followed by ...
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Fluorous Catalyst Recycling Utilising Highly Fluorinated Zinc Compounds: Ring Opening Polymerisation of e Caprolactone
... the polymerisation reaction with fluorous acids or alcohols regenerates the catalyst which can be recovered by fluorous solvent extractions and the catalytic activity is retained for three ...controlled ...
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A study of the effects of acid on the polymerisation of pyrrole, on the oxidative polymerisation of pyrrole and on polypyrrole
... of ring opening of the pyrrole ...catalysed polymerisation of pyrrole offers a facile route to polymers with amine and carbonyl functional groups, which could be further ...
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The preparation and testing of novel biodegradable surfactants using poly(lactic acid) as the backbone, by a one step ring opening polymerisation reaction
... Another experiment looking at transesterification was done using both DMAP and stannous octanoate, this time after 10 mins the polymers were reacted with succinic anhydride which ring opens to form a carboxylic ...
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A simple and versatile route to amphiphilic polymethacrylates : catalytic chain transfer polymerisation (CCTP) coupled with post polymerisation modifications
... Dual functionalisation: one-pot Michael-thiol addition followed by epoxide ring-opening Dual functionalisation reactions of p(GMA) polymers were carried out on a 5 g scale of macromolecules (1 eq.). P(GMA) ...
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Synthesis of DNA polymer conjugates using RAFT polymerisation
... Other hydrophilic polymers have been attached to DNA, and this has led to conjugates for use in a diverse range of applications. These include carriers for delivery of small interfering RNA, 60 DNA detection, 61-64 ...
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Application of controlled polymerisation techniques to the synthesis of polymers for the biomedical industry
... H Cobaloxime Figure 1.17, Synthetic route for the preparation of cobaloximes Rempel et al. have shown that cobaloxime interacts with MMA by a process analogous to the mechanism proposed for CCTP37. Whilst more oxygen ...
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The synthesis and use of cobalt complexes in catalytic chain transfer polymerisation
... generated reaction model presented by Scheffold for cobalt carbon bond formation and cleavage 25. Davis et a l 26 then attempted to build a mechanism for CCTP using a simulation based on the Daikh + Finke model as a ...
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Redox cationic polymerisation
... Table 3.26: Glass transition tem.perature (Tg) of a typical polyether formed by surface promoted redox cationic (SPRC) polymerisation, using a commercial anaerobic acrylate product as[r] ...
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Chiral polymerisation and the RNA world
... chiral polymerisation and RNA self-replication there is a symmetric solution where both enantiomers, or chains of all compositions, occur with equal ...chiral polymerisation model is ...the ...
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Symmetry breaking in chiral polymerisation
... Keywords: autocatalysis, bifurcations, chiral polymerisation, cross-catalysis, growth kinet- ics, symmetry-breaking. 1 Introduction Studies of the origins of life raise many associated fundamental questions. Among ...
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Oxidative polymerisation of calcium ligninsulphonate
... 5.12 Polarographic and s2~ome~-~vidences, for complex formation between heavy metal ions and calcium ligninsulphonate. Polarographic evidence[r] ...
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Ultra fast aqueous polymerisation of acrylamides by high power visible light direct photoactivation RAFT polymerisation
... of polymerisation - achieving conversions greater than 80% has required 5 to 10 ...long polymerisation times may be reduced by switching from batch to flow processing, as has recently been demonstrated by ...
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