Nanocrystalline cellulose (NCC) is prepared by hydrolysis of microcrystalline cellulose (MCC) with acid.Natural rubber (NR)/NCC compound co-coagulates with NR latex and NCC suspension.Carbon black (CB) is added to NR/NCC composite in the blending process.The mechanical and dynamic properties of NR/NCC/CB

NR/NCC/CB/RH (resorcinol-hexamine complex) and NR/CB were investigated.The results show that NCC disperses uniformly and orientates to the stretching direction in the NR matrix.The Payne effect weakens with the increase of NCC fraction.It indicates that NCC doesnt form a strong filler net and the total filler net in NR/NCC/CB is reduced in comparison with that of NR/CB.At the same time the variation of tan is not obvious.The addition of NCC can improve the mechanical property and the resistance to flex cracking of NR/CB and lower the heat build-up and the permanent set of dynamic compression.The abrasion resistance keeps constant when NCC is replaced by 5~20 phr of CB.DMA shows that the variation of Tg is not obvious

and the tan at 0℃ descends slightly while the tan at 60℃ descends obviously.The Payne effect of the NR/NCC/CB/RH system weakens sharply in comparison with that of the NR/NCC/CB system.And the mechanical property

the resistance to flex cracking and the abrasion resistance improve tremendously.At the same time

the heat buildup and the permanent set of the dynamic compression decrease further.