UV Cross-Linkable Lignin Thermoplastic Graft Copolymers

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C. Wang and R. A. Venditti, “UV Cross-Linkable Lignin Thermoplastic Graft Copolymers,” ACS Sustainable Chem. Eng., vol. 3, no. 8, pp. 1839–1845, Aug. 2015.

Type Journal Article
Author Chao Wang
Author Richard A. Venditti
URL http://dx.doi.org/10.1021/acssuschemeng.5b00416
Volume 3
Issue 8
Pages 1839-1845
Publication ACS Sustainable Chemistry & Engineering
Date August 3, 2015
Journal Abbr ACS Sustainable Chem. Eng.
DOI 10.1021/acssuschemeng.5b00416
Abstract This work highlighted a new method to prepare UV curable lignin thermoplastic copolymers, which are expected to show applications as functional materials (e.g., carbon fiber precursors) with improved thermal stability, solvent resistance and surface hardness. UV cross-linkable lignin graft copolymers were synthesized via activator regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) and characterized. By incorporating a photosensitive compound, acryloyl benzophenone (ABP), as a comonomer during the polymerization, lignin-g-poly(styrene-co-ABP) copolymers with 6?9% (mol %) of ABP moieties were obtained. The lignin graft copolymers showed similar glass transition temperature (?100 °C) as polystyrene. The carbon yields during pyrolysis decreased as the degrees of polymerization of the graft copolymers increased. Under UV irradiation, up to ?30 wt % of the lignin-g-poly(styrene-co-ABP) copolymers cross-linked to form polymer networks, whereas less than ?5 wt % of the lignin-g-polystyrene copolymers formed gelled structures.


Tags:

 

  • Carbon
  • Immobilization
  • Irradiation
  • Mechanical properties
  • Molecular weight
  • Oxidoreductions
  • Polymerization
  • Polymers
  • Polystyrene
  • Pyrolysis

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