Carbon black reinforced natural rubber/butadiene rubber and natural rubber/butadiene rubber/styrene-butadiene rubber composites: Part I: Rheological, mechanical and thermomechanical properties
Engin Burgaz1,2, Okan Gencoglu2, Mert Goksuzoglu2,3
1Department of Metallurgical and Materials Engineering, Ondokuz Mayis University, Samsun TURKEY
2Department of Nanoscience and Nanotechnology, Ondokuz Mayis University, Samsun TURKEY
3SAMPA Automotive R&D Center, Tekkekoy, 55300 Samsun, Turkey
Carbon black reinforced rubber composite;
Carbon black reinforced natural rubber (NR)/butadiene rubber (BR), NR/styrene-butadiene rubber (SBR) and NR/BR/SBR composites were prepared by using two types of BR with highly linear (higher viscosity and molecular weight) and branched chain structures. In NR/BR composite with a higher viscosity BR, the presence of both polysulphidic and monosulphidic types of crosslinking was confirmed based on FT-IR data. NR/BR composite consisting of BR with higher viscosity has the lowest Payne effect and compression set values. NR/BR/SBR composites have much lower Payne effect values compared to NR/SBR system. Also, the addition of BR to NR decreases the tan d value and leads to lowest values of tan d in NR/BR composites. Tensile strength and elongation at break values in NR/BR/SBR composites are improved with the addition of BR with a lower viscosity. In comparison with NR/SBR, NR/BR/SBR composites exhibit much less compression set and stress relaxation values because NR/SBR composite exhibits more permanent deformation due to its more rigid styrene content. Here, these results clearly show that blending carbon black reinforced NR or NR/SBR composites with BR having different degrees of viscosity is quite favorable in terms of using these NR composites as anti-vibrational rubber bushings in automotive applications. © 2019 MIM Research Group. All rights reserved.