Characteristic properties of organosolv lignin/polylactide copolymers

Stephanie B. Harris, Ulrike W. Tschirner, Nathan Lemke, Jorgen L. van Lierop

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A polylactide (PLA)/switchgrass organosolv lignin graft copolymer was synthesized via ring-opening polymerization. The resulting copolymer was characterized by size exclusion chromatography (SEC), differential scanning calorimetry, tensile testing, and hydrogen nuclear magnetic resonance spectroscopy. Phenolic hydroxyl content, percent lignin retained, and ultraviolet (UV) light transmission were investigated by UV light spectroscopy. Hydrolytic degradation and water vapor transmission rates were also investigated.It was found that the addition of organosolv switchgrass lignin to the polymer slowed the rate of degradation and water vapor transmission rate of the copolymer compared to the PLA homopolymer at varying temperatures. UV light transmission was also reduced with the addition of lignin.

Original languageEnglish (US)
Pages (from-to)211-224
Number of pages14
JournalJournal of Wood Chemistry and Technology
Volume37
Issue number3
DOIs
StatePublished - May 4 2017

Bibliographical note

Publisher Copyright:
© 2017, Copyright © Taylor & Francis Group, LLC.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

  • Compostable polymer
  • lignin/lactide copolymer
  • polymer degradation
  • switchgrass lignin
  • water vapor transmission rate

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