Synthesis of pseudopolyrotaxanes using mixtures of cyclic oligoesters

Dad, Sameena; Hodge, Philip; Kamau, Stephen D.

doi:10.1016/s1381-5148(02)00188-8

Cited by 4 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…very little, if any, of the smaller rings are present if they are strained, see entries 6 and 12, then, once the rings are strainless, they progressively decrease in amount as they increase in size. Numerically the percentage compositions are very similar to those obtained from the CDPs of simple aliphatic polyesters [46,47]. Second, the compositions of the MCOs obtained using Grubbs' catalyst 1 are sometimes significantly different to those obtained using Grubbs' catalyst 2: compare, for example, Table 3 entries 4 and 5.…”

Section: Cyclo-depolymerization Of the Olefin-containing Polyesters 1supporting

confidence: 65%

Cyclo-depolymerization of olefin-containing polymers to give macrocyclic oligomers by metathesis and the entropically-driven ROMP of the olefin-containing macrocyclic esters

Kamau

Hodge

Hall

et al. 2007

Polymer

Self Cite

View full text Add to dashboard Cite

Section: Cyclo-depolymerization Of the Olefin-containing Polyesters 1supporting

confidence: 65%

Cyclo-depolymerization of olefin-containing polymers to give macrocyclic oligomers by metathesis and the entropically-driven ROMP of the olefin-containing macrocyclic esters

Kamau

Hodge

Hall

et al. 2007

Polymer

Self Cite

View full text Add to dashboard Cite

“…The synthesis and the factors that can affect the yield in statistical threading such as the ring size, the linear chain length, the temperature, the molar ratios of rings to chains, etc., have been studied by some groups. [1][2][3][4][5][6][7][8][9] Other groups have applied the statistical threading method to synthesize several rotaxane systems using polymerization reactions, e.g., polyesters, 11 polystyrene, 12,14 polyacrylate, and poly͑methacrylate͒. 13 However, the synthesis of homorotaxanes or homopolyrotaxanes with satisfactory yields has still proven to be difficult, as the process is purely entropically driven.…”

Section: Introductionmentioning

confidence: 99%

Modification of statistical threading in two-component pseudorotaxane melts using the amphiphilic approach and variations in the confinement geometry

Rane

Mattice

Pugh

2004

The Journal of Chemical Physics

View full text Add to dashboard Cite

Recently we described a coarse-grained model of poly(ethylene oxide) and then employed that model to study the amount of spontaneous threading of cyclic molecules by linear chains in the melt [C. A. Helfer, G. Xu, W. L. Mattice, and C. Pugh, Macromolecules 36, 10071 (2003)]. Since the amount of statistical threading at equilibrium is small, there is interest in identifying physical changes in the system that will increase the threading. We now use that coarse-grained model to investigate the effect on threading of various hypothetical (but feasible) modifications to the two-component system of macrocycles and linear chains in the melt, and different confinement geometries, that can bring about correlations in the arrangement of the rings. Our work follows on the concept of an amphiphilic approach [C. Pugh, J.-Y. Bae, J. R. Scott, and C. L. Wilkins, Macromolecules 30, 8139 (1997)] for increasing the statistical threading in homopolyrotaxane melts. We investigate whether introducing such correlations in the macrocycles can increase the spontaneous threading. This paper shows that some of our modifications can yield more than double the amount of threading seen in purely statistical mixing.

show abstract

Recent work on entropically‐driven ring‐opening polymerizations: some potential applications

Hodge

Colquhoun

2005

Polymers for Advanced Techs

View full text Add to dashboard Cite

The entropically‐driven ring‐opening polymerization of macrocyclic monomers (>ca. 14 ring atoms per repeat unit) and/or macrocyclic oligomers is a relatively new method of polymer synthesis that exploits the well‐known phenomenon of ring‐chain equilibria. It attracts interest because of its novel features. For example, these ring‐opening polymerizations emit no volatiles and little or no heat. This review considers the principles of entropically‐driven ring‐opening polymerizations, gives selected examples and discusses potential applications. The latter include micromolding, high throughput syntheses and the synthesis of supramolecular polymers. Copyright © 2005 John Wiley & Sons, Ltd.

show abstract

Synthesis of pseudopolyrotaxanes using mixtures of cyclic oligoesters

Cited by 4 publications

References 22 publications

Cyclo-depolymerization of olefin-containing polymers to give macrocyclic oligomers by metathesis and the entropically-driven ROMP of the olefin-containing macrocyclic esters

Cyclo-depolymerization of olefin-containing polymers to give macrocyclic oligomers by metathesis and the entropically-driven ROMP of the olefin-containing macrocyclic esters

Modification of statistical threading in two-component pseudorotaxane melts using the amphiphilic approach and variations in the confinement geometry

Recent work on entropically‐driven ring‐opening polymerizations: some potential applications

Contact Info

Product

Resources

About