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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Metoxitereftalatos derivados de la lignina para polímeros y plastificantes de mejor rendimiento

Gloria Rosetto1, Katherine A Chism1, Luana Cardinale2

  • 1Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, CO 80401, United States.

ACS sustainable chemistry & engineering
|August 26, 2025
PubMed
Resumen

Los metoxitereftalatos de base biológica de la lignina ofrecen alternativas sostenibles para los poliésteres y los plastificantes. Estos compuestos pueden ajustar las propiedades del tereftalato de polietileno y mejorar el rendimiento del cloruro de polietileno, reduciendo la dependencia de los productos petroquímicos.

Palabras clave:
Productos químicos de origen biológicoPolímeros de base biológicacarboxilación electroquímicasustitución funcionalBioproducto con ventajas de rendimiento

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Área de la Ciencia:

  • Química verde y materiales sostenibles
  • Ciencia e ingeniería de polímeros
  • Valorización de la biomasa

Sus antecedentes:

  • Los ácidos carboxílicos aromáticos derivados de la lignina son bloques de construcción valiosos de origen biológico.
  • Los poliésteres y plastificantes actuales a menudo se basan en materias primas petroquímicas.
  • Hay necesidad de alternativas sostenibles con propiedades sintonizables.

Objetivo del estudio:

  • Sintetizar y evaluar los metoxitereftalatos derivados de la lignina como sustitutos de los productos petroquímicos.
  • Investigar su uso como co-monómeros en el polietileno tereftalato (PET).
  • Evaluar su eficacia como plastificantes en el cloruro de polivinilo (PVC).

Principales métodos:

  • Carboxilación electroquímica de los monómeros de lignina para producir metoxitereftalatos.
  • Co-polimerización de metoxitereftalatos con dimetiltereftalato para la formación de copolímeros de PET.
  • Evaluación de los ésteres de metoxitereftalato como plastificantes del PVC.
  • Simulaciones dinámicas moleculares para predecir los coeficientes de difusión y la volatilidad.

Principales resultados:

  • Se ha sintetizado con éxito 2-metoxitereftalato y 2,6-dimetoxitereftalato.
  • Los copolímeros de PET con una incorporación de metoxitereftalato de >25% se convirtieron en amorfos.
  • A una carga de 10 mol%, los co-monómeros biológicos redujeron la cristalinidad y la temperatura de fusión del PET.
  • Los plastificantes biológicos igualaron o superaron a sus homólogos derivados del petróleo en aplicaciones de PVC.
  • Los ésteres de dimetoxitereftalato mostraron una menor volatilidad y difusión, lo que sugiere una vida útil más larga.

Conclusiones:

  • Los metoxitereftalatos derivados de la lignina son sustitutos biológicos viables para el isoftalato y el ftalato.
  • Estos compuestos permiten ajustar las propiedades del PET y mejorar el rendimiento del PVC.
  • El estudio demuestra un camino hacia poliésteres y plastificantes más sostenibles.