Correlations among Miscibility, Structure, and Properties in Thermoplastic Polymer/Lignin Blends

Vivien Romhányi, Dávid Kun, B. Pukánszky

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Blends were prepared from an industrial lignosufonate and seven matrix polymers with different chemical structures. The components were homogenized in an internal mixer and plates were compression molded for further testing. The blends were characterized by a number of methods: structure by scanning electron microscopy, interactions by dynamic mechanical thermal analysis, and differential scanning calorimetry, while mechanical properties were characterized by tensile testing. Only weak dispersion forces develop in polyolefins, and the properties of the blends are poor. Aromatic, π electron interactions are stronger and H-bonds result in reasonable compatibility and mechanical properties. The best properties were achieved with the ionomer as matrix in which the combination of hydrogen bridges and ionic bonds results in good compatibility and properties. The strength of interactions was estimated with the Flory-Huggins interaction parameter, and good quantitative correlations were found among miscibility, structure, and properties, which could be predicted with simple theories. Although blends with acceptable properties could be prepared from the ionomer and lignin, the deformability of most blends was very small limiting practical application. The plasticization or chemical modification of lignin may lead to materials which can be used in industrial practice.

Original languageEnglish
JournalACS Sustainable Chemistry and Engineering
DOIs
Publication statusAccepted/In press - Jan 1 2018

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Ionomers
Lignin
Thermoplastics
lignin
mechanical property
Polymers
polymer
Solubility
industrial practice
Mechanical properties
matrix
Polyolefins
Tensile testing
calorimetry
Chemical modification
Formability
Polymer matrix
Thermoanalysis
Hydrogen
Differential scanning calorimetry

Keywords

  • Compatibility
  • Dispersed structure
  • Hydrogen bridges
  • Interactions
  • Ionic bonds
  • Lignin blends
  • Miscibility
  • Modeling

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

Correlations among Miscibility, Structure, and Properties in Thermoplastic Polymer/Lignin Blends. / Romhányi, Vivien; Kun, Dávid; Pukánszky, B.

In: ACS Sustainable Chemistry and Engineering, 01.01.2018.

Research output: Contribution to journalArticle

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