Lignin-Based Triple Shape Memory Polymers

Biomacromolecules. 2015 Sep 14;16(9):2735-42. doi: 10.1021/acs.biomac.5b00655. Epub 2015 Aug 7.

Abstract

Lignin-based triple shape memory polymers comprised of both permanent covalent cross-links and physical cross-links have been synthesized. A mixing phase with poly(ester-amine) and poly(ester-amide) network having two distinct glass transitions was hot mixed with more structurally homogenized methanol soluble lignin fraction by one-pot, two-step method. Triple shape properties arise from the combined effect of the glass transition of polyester copolymers and lignin and the dissociation of self-complementary hydrogen bonding and cross-link density. The percentage of recovery in each stage was investigated and it was proved that the first recovery is related with lignin-poly(ester-amine) rich network and the second recovery stage is related with lignin-poly(ester-amide) rich network. The thermal and mechanical properties of the lignin-copolymer networks were also investigated using differential scanning calorimetry and dynamic mechanical analysis.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Lignin / chemistry*
  • Nylons* / chemical synthesis
  • Nylons* / chemistry
  • Polyamines* / chemical synthesis
  • Polyamines* / chemistry
  • Polyesters* / chemical synthesis
  • Polyesters* / chemistry

Substances

  • Nylons
  • Polyamines
  • Polyesters
  • Lignin