Abstract
We explore the influence of surface modification of SiO2 on dynamic properties and heat buildup of semi-efficient vulcanisates filled by both SiO2 and carbon black. Compared with untreated-SiO2-filled natural rubber (NR), vulcanisates reinforced by modified-SiO2 presents not only better filler dispersity, mechanical properties and dynamic properties, as confirmed by scanning electron microscope and rubber processing analyser, but also lower heat buildup. Fourier infrared spectroscopy and cure characteristics indicates that silane coupling agent molecules grafted on the silica surface provoke an enhanced mobility of rubber chain and adsorb onto filler surface and then decrease the barrier of crosslink reaction. Moreover, composites with Si69-modified-SiO2 show obviously the highest tear strength and lowest heat buildup attributed to that more sulphur released by Si69 also participate the vulcanisation reaction.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
