4.0 Article

Understanding the Coupling Effect between Lignin and Polybutadiene Elastomer

Journal

JOURNAL OF COMPOSITES SCIENCE
Volume 5, Issue 6, Pages -

Publisher

MDPI
DOI: 10.3390/jcs5060154

Keywords

waste utilization; lignin as a filler; lignin-rubber composites; physicomechanical properties; reinforcement

Funding

  1. Hari Shankar Singhania Elastomer & Tyre Research Institute (HASETRI)
  2. DFG Research Training Group 2430 [380321452]

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Using renewable resources to produce high-performance elastomer composites is a win-win strategy. Lignin, as a renewable biomass, can be mixed with polybutadiene rubber at elevated temperature to achieve superior mechanical performance, and the efficient dispersion of lignin into the rubber matrix through interfacial interaction enables excellent mechanical properties of the rubber composites.
From an environmental and economic viewpoint, it is a win-win strategy to use materials obtained from renewable resources for the production of high-performance elastomer composites. Lignin, being a renewable biomass, was employed as a functional filler material to obtain an elastomer composite with a higher degree of mechanical performance. In the presence of a suitable coupling agent, an elevated temperature was preferred for the reactive mixing of lignin with polybutadiene rubber (BR). It is quite fascinating that the mechanical performance of this composite was comparable with carbon black-filled composites. The extraordinary reinforcing behavior of lignin in the BR matrix was understood by an available model of rubber reinforcement. In rubber composite preparation, the interfacial interaction between polybutadiene rubber and lignin in the presence of a coupling agent enabled the efficient dispersion of lignin into the rubber matrix, which is responsible for the excellent mechanical properties of the rubber composites. The rubber composites thus obtained may lead to the development of a sustainable and cost-effective end product with reliable performance. This novel approach could be implemented in other type of elastomeric materials, enabling a genuine pathway toward a sustainable globe.

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