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Chemically Recyclable Poly(β-thioether ester)s Based on Rigid Spirocyclic Ketal Diols Derived from Citric Acid

Sedrik, Rauno ; Bonjour, Olivier LU ; Laanesoo, Siim ; Liblikas, Ilme ; Pehk, Tõnis ; Jannasch, Patric LU orcid and Vares, Lauri (2022) In Biomacromolecules 23(6). p.2685-2696
Abstract
Incorporating rigid cyclic acetal and ketal units into polymer structures is an important strategy towards high-performance materials from renewable resources. In the present work, citric acid, a widely used platform chemical derived from biomass, has been efficiently converted into diand tricyclic diketones. Ketalization with glycerol or trimethylolpropane afforded rigid spirodiols, which were obtained as complex mixtures of isomers. After a comprehensive NMR analysis, the spirodiols were converted into the respective di(meth)acrylates and utilized in thiol-ene polymerizations in combination with different dithiols. The resulting poly(β-thioether ester ketal)s were thermally stable up to 300 °C and showed glass transition temperatures in... (More)
Incorporating rigid cyclic acetal and ketal units into polymer structures is an important strategy towards high-performance materials from renewable resources. In the present work, citric acid, a widely used platform chemical derived from biomass, has been efficiently converted into diand tricyclic diketones. Ketalization with glycerol or trimethylolpropane afforded rigid spirodiols, which were obtained as complex mixtures of isomers. After a comprehensive NMR analysis, the spirodiols were converted into the respective di(meth)acrylates and utilized in thiol-ene polymerizations in combination with different dithiols. The resulting poly(β-thioether ester ketal)s were thermally stable up to 300 °C and showed glass transition temperatures in a range from -7 to 40 °C, depending on monomer composition. The polymers were stable in aqueous acids and bases, but in a mixture of 1 M aq. HCl and acetone, the ketal functional groups were cleanly hydrolyzed, opening the pathway for potential chemical recycling of these materials. We envision that these novel bioderived spirodiols have a great potential to become valuable and versatile bio-based building blocks for several different kinds of polymer materials. (Less)
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biomacromolecules
volume
23
issue
6
pages
12 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85131690329
ISSN
1526-4602
DOI
10.1021/acs.biomac.2c00452
language
English
LU publication?
yes
id
66fc616c-2591-4f71-80ef-392f1e7aa03b
date added to LUP
2022-05-11 12:07:42
date last changed
2022-07-01 04:04:32
@article{66fc616c-2591-4f71-80ef-392f1e7aa03b,
  abstract     = {{Incorporating rigid cyclic acetal and ketal units into polymer structures is an important strategy towards high-performance materials from renewable resources. In the present work, citric acid, a widely used platform chemical derived from biomass, has been efficiently converted into diand tricyclic diketones. Ketalization with glycerol or trimethylolpropane afforded rigid spirodiols, which were obtained as complex mixtures of isomers. After a comprehensive NMR analysis, the spirodiols were converted into the respective di(meth)acrylates and utilized in thiol-ene polymerizations in combination with different dithiols. The resulting poly(β-thioether ester ketal)s were thermally stable up to 300 °C and showed glass transition temperatures in a range from -7 to 40 °C, depending on monomer composition. The polymers were stable in aqueous acids and bases, but in a mixture of 1 M aq. HCl and acetone, the ketal functional groups were cleanly hydrolyzed, opening the pathway for potential chemical recycling of these materials. We envision that these novel bioderived spirodiols have a great potential to become valuable and versatile bio-based building blocks for several different kinds of polymer materials.}},
  author       = {{Sedrik, Rauno and Bonjour, Olivier and Laanesoo, Siim and Liblikas, Ilme and Pehk, Tõnis and Jannasch, Patric and Vares, Lauri}},
  issn         = {{1526-4602}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{2685--2696}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Biomacromolecules}},
  title        = {{Chemically Recyclable Poly(β-thioether ester)s Based on Rigid Spirocyclic Ketal Diols Derived from Citric Acid}},
  url          = {{http://dx.doi.org/10.1021/acs.biomac.2c00452}},
  doi          = {{10.1021/acs.biomac.2c00452}},
  volume       = {{23}},
  year         = {{2022}},
}