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Comparative Study
. 2016 Feb 16;21(2):219.
doi: 10.3390/molecules21020219.

Comparison of Properties among Dendritic and Hyperbranched Poly(ether ether ketone)s and Linear Poly(ether ketone)s

Atsushi Morikawa  1
Affiliations
Comparative Study

Comparison of Properties among Dendritic and Hyperbranched Poly(ether ether ketone)s and Linear Poly(ether ketone)s

Atsushi Morikawa. Molecules. .

Abstract

Poly(ether ether ketone) dendrimers and hyperbranched polymers were prepared from 3,5-dimethoxy-4'-(4-fluorobenzoyl)diphenyl ether and 3,5-dihydroxy-4'-(4-fluorobenzoyl)diphenyl ether through aromatic nucleophilic substitution reactions. 1-(tert-Butyldimethylsiloxy)-3,5-bis(4-fluorobenzoyl)benzene was polycondensed with bisphenols, followed by cleavage of the protective group to form linear poly(ether ketone)s having the same hydroxyl groups in the side chains as the chain ends of the dendrimer and hyperbranched polymers. Their properties, such as solubilities, reduced viscosities, and thermal properties, were compared with one another. Similar comparisons were also carried out among the corresponding methoxy group polymers, and the size of the molecules was shown to affect the properties.

Keywords: hyperbranched polymers; linear poly(ether ketone)s; molecular size; poly(ether ether ketone) dendrimers; reduced viscosities; solubility; thermal properties.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Scheme 1
Scheme 1
Synthesis of poly(ether ether ketone) dendrimers.
Scheme 2
Scheme 2
Synthesis of hyperbranched poly(ether ether ketone).
Figure 1
Figure 1
Gel permeation chromatography of DenG3-OH, Hyper-OH, linear-OH-BisA, and linear-OH-HQ.
Scheme 3
Scheme 3
Synthesis of linear poly(ether ketone)s having hydroxyl groups in the side chains.
Figure 2
Figure 2
1H-NMR spectra of protected Linear-OH-BisA and Linear-OH-BisA.
Figure 3
Figure 3
Reduced viscosities of DenG3-OMe, Hyper-OMe, Linear-OMe-BisA, and Linear-OMe-HQ.
Figure 4
Figure 4
Reduced viscosities of DenG3-OH, Hyper-OH, Linear-OH-BisA and Linear-OH-HQ.
Figure 5
Figure 5
DSC curves of DenG3-OMe, Hyper-OMe, Linear-OMe-BisA, and Linear-OMe-HQ.
Figure 6
Figure 6
DSC curves of DenG3-OH, Hyper-OH, Linear-OH-BisA, and Linear-OH-HQ.
See this image and copyright information in PMC

References

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