Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Mechanism of plasma-assisted and accelerator/coupling agent synergistic modification for pyrolysis carbon black/natural rubber composites.


ABSTRACT
In this paper, aqueous aminosilane and aluminate were used as VOC-free green coupling agents, air and oxygen plasma-assisted accelerator/coupling agent synergistic modification of pyrolysis carbon black (CBp) and natural rubber latex shear dewatering process were proposed to prepare high-quality CBp/natural rubber (NR) wet masterbatch. Low-temperature plasma technology was used to improve the surface activity of CBp, promote the physical loading, and chemical bonding between CBp and accelerator/aminosilane/aluminate coupling agent. Furthermore, the high shearing forces of the twin-screw served to directionally disrupt the filler agglomerates and reconstruct the weak crosslinking network dominated by the rubber-filler interface. The experimental results showed that physical loading of accelerators and chemical grafting of coupling agents promoted the organic modification of CBp, and the surface activity of CBp was further improved under the air and oxygen plasma. Aminosilane/DPG/CBp/NR composites and aluminate/DPG/CBp/NR composites prepared by the oxygen plasma process showed an increase in vulcanization speed, a decrease in rolling resistance, 42% and 36% increases in abrasion resistance, respectively, compared to the pure twin-screw shear process. Aluminate is more conducive to improve the processing fluidity, processing safety and tensile product coefficient of the composites, and the aminosilane makes the composites more wear-resistant.