Tailored sequencing of highly brominated Poly(ether ether ketone) as a means to preserve crystallizability and enhance Tg
Tailored sequencing of highly brominated Poly(ether ether ketone) as a means to preserve crystallizability and enhance Tg
复制标题
高度溴化聚醚醚酮的定制测序作为保持结晶性和提高 Tg 的手段
DOI:
10.1016/j.polymer.2022.124918
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发表时间:
2022
期刊:
影响因子:
4.6
通讯作者:
Moore, Robert B.
中科院分区:
文献类型:
--
作者:
Kasprzak, Christopher R.;Anderson, Lindsey J.;Moore, Robert B.
In this report, the bromination of poly(ether ether ketone) (PEEK) using the mild reagentN-bromosuccinimide (NBS) is explored to generate controlled random and blocky microstructures. Bromination proceeded quantitatively in both the solution state and semicrystalline gel-state, and degrees of bromination between 25 and 175 mol% were obtained for both random and blocky BrPEEK. Spectroscopic evidence revealed a higher prevalence of unfunctionalized repeat units for blocky BrPEEK than random BrPEEK at similar degrees of functionality. Furthermore, at similar degrees of bromination, blocky BrPEEK exhibited enhanced glass transition temperatures, greater crystallizability, higher melting temperatures, and faster crystallization kinetics than random BrPEEK, suggesting longer segments of unfunctionalized PEEK in blocky BrPEEK. Overall, this work demonstrates that PEEK can be brominated to very high degrees of substitution in the semicrystalline gel-state while preserving crystallizability and effectively blocking up the functionality.
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1992
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