Journal
POLYMERS
Volume 13, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/polym13030443
Keywords
self-healing; natural rubber; carbon nanotubes; electrical recyclability; tire application
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Funding
- King Mongkut's University of Technology Thonburi (KMUTT), Bangkok
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The self-healing composites prepared from BIIR and NR blends filled with CNT and CB showed improved cure and tensile properties after modification with IL and IM. The composites exhibited superior mechanical and electrical properties, making them suitable for inner liner and tire tread applications.
The self-healing composites were prepared from the combination of bromobutyl rubber (BIIR) and natural rubber (NR) blends filled with carbon nanotubes (CNT) and carbon black (CB). To reach the optimized self-healing propagation, the BIIR was modified with ionic liquid (IL) and butylimidazole (IM), and blended with NR using the ratios of 70:30 and 80:20 BIIR:NR. Physical and chemical modifications were confirmed from the mixing torque and attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR). It was found that the BIIR/NR-CNTCB with IL and IM effectively improved the cure properties with enhanced tensile properties relative to pure BIIR/NR blends. For the healed composites, BIIR/NR-CNTCB-IM exhibited superior mechanical and electrical properties due to the existing ionic linkages in rubber matrix. For the abrasion resistances, puncture stress and electrical recyclability were examined to know the possibility of inner liner applications and Taber abrasion with dynamic mechanical properties were elucidated for tire tread applications. Based on the obtained T-g and Tan delta values, the composites are proposed for tire applications in the future with a simplified preparation procedure.
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