ZnO Nanoparticles Bonded to SiO2 Filler as a Curing Accelerator in Cold Vulcanizing Adhesives
Citation
Acikgoz, C., Sahbaz, D. A., & Kockar, O. M. (2017). ZnO nanoparticles bonded to SiO2 filler as a curing accelerator in cold vulcanizing adhesives. Acta Phys. Pol. A, 131, 200-203.Abstract
The aim of this study is to investigate the interaction of ZnO/SiO2 particles between the chloroprene rubber
and its effect on the cure characteristics and mechanical properties of the cold vulcanizing adhesives. Curing efficiency
and mechanical properties of ZnO/SiO2 filled adhesives were compared with SiO2 filled adhesives. ZnO
nanoparticles were bounded to SiO2 spherical nanoparticles by hydrolysis and condensation process. The morphology
and elemental content of ZnO/SiO2 particles were investigated by scanning electron microscopy and energy
dispersive spectroscopy. The ZnO/SiO2 particles were then blended with chloroprene rubber as accelerator during
the vulcanization process. Cure characteristics, which are scorch time (ts2), cure time (tc90), maximum torque
(MH) and minimum torque (ML) of the rubber compounds were determined at 190 C with a moving die rheometer.
The fabric conveyor belt was used for measuring adhesive strength of the adhesives. The fabric conveyor belt
was used for measuring adhesive strength of the adhesives. Application of the cold vulcanizing adhesives to the
fabric conveyor belt was carried out at three different times (4, 8, and 24 h), 25 C temperature and 0.3 kg/cm2
pressure. The results showed that ZnO/SiO2 particles provided a higher adhesive strength than silica in the 4, 8,
and 24 h of adhesion. ZnO/SiO2 filled rubber blends gained superior vulcanization characteristics by the increasing
cure rate index with the reducing cure time and scorch time. It has been concluded that ZnO/SiO2 particles can
be used as a new curing accelerator and simultaneously reinforcing filler.