Influence of kraft lignin on the properties of rubber composites

Matshidiso Makhalema, Percy Hlangothi, Setumo Victor Motloung, Lehlohonolo Fortune Koao, Tshwafo Elias Motaung

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The influence of lignin content on reclaimed rubber (RR)/natural rubber (NR) blend composite properties has successfully been studied. Scanning electron microscopy (SEM) were used to understand morphology. Fourier-transform infrared spectroscopy (FTIR) for the possible chemical interaction, whereas thermogravimetric analysis (TGA) and tensile tester were used to predict strength and elongation for possible practical applications. The results indicated that the presence of lignin forms cavities which seemed to arise from complex interactions of the blend with the lignin. Those cavities dominated tensile fractured surface and the increase in lignin indicated inconsistencies of interfacial interactions. Lignin RR/NR blend composites revealed a drop in tensile strength and shift in glass transition temperature, except for the highest lignin containing blend composite. More active interactive constituent of the blend appeared to be NR. The interaction has not favored the thermal stability and crosslinking density.

Original languageEnglish
Pages (from-to)285-296
Number of pages12
JournalWood Research
Issue number2
Publication statusPublished - 2021


  • Biomass
  • Blend composites
  • Lignin
  • Lignin-polymer composites
  • Polymer composites


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