Abstract
In response to increasingly stringent requirements for the sustainability and environmental friendliness of the rubber industry, the application and development of bio-based elastomers have received extensive attention. In this work, we prepared a new type of bio-based elastomer poly(dibutyl itaconate-butadiene) copolymer (PDBIB) nanocomposite using carbon black and non-petroleum-based silica with a coupling agent. Using dynamic thermodynamic analysis (DMTA) and scanning electron microscope (SEM), we studied the effects of feed ratio on dynamic mechanical properties, micro morphology, and filler dispersion of PDBIB composites. Among them, silica-reinforced PDBIB60 (weight ratio of dibutyl itaconate to butadiene 40/60) and carbon black-reinforced PDBIB70 (weight ratio of dibutyl itaconate to butadiene 30/70) both showed excellent performance, such as tensile strength higher than 18 MPa and an elongation break higher than 400%. Compared with the widely used ESBR, the results showed that PDBIB had better rolling resistance and heat generation than ESBR. In addition, considering the development of green tires, we compared it with the solution polymerized styrene–butadiene rubber with better comprehensive performance, and analyzed the advantages of PDBIB and the areas to be improved. In summary, PDBIB prepared from bio-based monomers had superior performance and is of great significance for achieving sustainable development, providing a direction for the development of high-performance green tire and holding great potential to replace petroleum-derived elastomers.
Highlights
Due to its unique high elasticity and large deformation capacity, rubber materials have become irreplaceable in many fields, such as the tire industry [1,2,3], sealing industry [4], as well as the damping and shock absorption industry [5,6,7]
Different from traditional petroleum-based engineering rubber, the molecular structure of bio-based elastomers designed in this paper includes weakly polar long-chain ester groups and flexible butadiene segments, which are quite different from traditional NR, SBR, and NBR, so the research about performance and interface interaction of silica-filled poly(dibutyl itaconate-co-butadiene) (PDBIB) and carbon black-filled
To further compare PDBIB and ESBR nanocomposites, scanning electron microscope (SEM) was used to investigate the state of dispersion of fillers in the PDBIB and ESBR nanocomposites
Summary
Due to its unique high elasticity and large deformation capacity, rubber materials have become irreplaceable in many fields, such as the tire industry [1,2,3], sealing industry [4], as well as the damping and shock absorption industry [5,6,7]. Using renewable resources to prepare a new generation of bio-based elastomer materials is an innovative idea to keep sustainable development of the synthetic rubber industry. Bio-based itaconate elastomer (PDBIB) [14,36] involved in this article belongs to the second route It is a new type of bio-based synthetic rubber prepared based on bulk bio-based chemicals, itaconic acid, n-butanol, and a small amount of diene. Different from traditional petroleum-based engineering rubber, the molecular structure of bio-based elastomers designed in this paper includes weakly polar long-chain ester groups and flexible butadiene segments, which are quite different from traditional NR (natural rubber), SBR (styrene–butadiene rubber), and NBR (nitrile rubber), so the research about performance and interface interaction of silica-filled PDBIB and carbon black-filled. A comparatively comprehensive comparison of the properties of bio-based elastomers nanocomposites and traditional bulk ESBR and SSBR nanocomposites are of great value for the true application of bio-based elastomers
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