Multicyclic Polyethers Derived from 1,4-Dicyanotetrafluorobenzene and Flexible Diphenols

doi:10.1021/MA060895L

Paper

Multicyclic Polyethers Derived from 1,4-Dicyanotetrafluorobenzene and Flexible Diphenols

Published Aug 17, 2006 · H. Kricheldorf, J. Schellenberg, Gert Schwarz

Macromolecules

Q1 SJR score

12

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0

Influential Citations

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Abstract

1,4-Dicyanotetrafluorobenzene (DCTB) was polycondensed with various diphenols in DMF or DMSO using K2CO3 as catalyst and HF acceptor. At concentrations of 0.1 or 0.2 mol/L for DCTB, gels were obtained with 1,4-bis[2-(4-hydroxyphenyl)-2-propyl]benzene, with 1,3-bis[(4-hydroxyphenyl)-2-propyl]benzene and with α,ω-bis(4-hydroxyphenoxy) alkanes as comonomers. Yet soluble multicyclic polyethers were formed with α,ω-bis(3-hydroxyphenoxy) alkanes. The lengths of the alkane chains did not play any role for the successful syntheses of soluble multicycles. Furthermore, a model reaction with p-cresol was conducted, proving the feasibility of a quantitative tetrasubstitution of all four F-atoms in DCTB. The multicyclic polyethers were characterized by elemental analyses, 13C NMR spectroscopy, MALDI-TOF mass spectrometry, DSC, viscosity, and SEC measurements. As expected, high polydispersities (up to 8) were found. The DSC measurements indicated an amorphous character of all multicycles with glass-transition temperatu...

Study Snapshot

Multicyclic polyethers synthesized from 1,4-Dicyanotetrafluorobenzene and flexible diphenols show high polydispersities and amorphous nature, with potential applications in pharmaceuticals and cosmetics.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Paper

Multicyclic Polyethers Derived from 1,4-Dicyanotetrafluorobenzene and Flexible Diphenols

References

Citations

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