Citation: Ju Gu, Wan-juan Chen, Lu Lin, Yuan-fang Luo, De-min Jia. EFFECT OF NANOCRYSTALLINE CELLULOSE ON THE CURING CHARACTERISTICS AND AGING RESISTANCE PROPERTIES OF CARBON BLACK REINFORCED NATURAL RUBBER[J]. Chinese Journal of Polymer Science, ;2013, 31(10): 1382-1393. doi: 10.1007/s10118-013-1340-6 shu

EFFECT OF NANOCRYSTALLINE CELLULOSE ON THE CURING CHARACTERISTICS AND AGING RESISTANCE PROPERTIES OF CARBON BLACK REINFORCED NATURAL RUBBER

Ju Gu ^1,, ,
Wan-juan Chen ¹ ,
Lu Lin ¹ ,
Yuan-fang Luo ¹ ,
De-min Jia ¹

1.
College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China

Corresponding author: Ju Gu,
Received Date: 29 October 2012
Revised Date: 31 January 2013

Fund Project: National Natural Science Foundation of China (No. 51173046), National Natural Science Foundation of China Joint Fund of Guangdong Province (No. U1134005).

This work focused on the effect of nanocrystalline cellulose (NCC) on the curing characteristics, aging resistance and thermal stability of natural rubber (NR) reinforced with carbon black (CB). Sharing the same fillers loading of 45 parts per hundred rubber (phr), NR/NCC/CB composites with different NCC/CB ratios (i.e. 0/45, 5/40, 10/35, 15/30, 20/25 phr) were prepared and analyzed. Resorcinol and hexamethylene tetramine (RH), acting as the modifier in NR/NCC interface, was also discussed for its influence. The result showed that an relatively higher ratio of NCC/CB led to a lower torque, a shorter cure time (T90), a slightly longer scorch time (T10) and a bigger vulcanization rate constant (K). This tendency suggested that the existence of NCC accelerated the vulcanization process. Additionally, modified by RH, NR/NCC/CB compounds exhibited a short T10 and a elevated torque. And a moderate RH content would lower the Ea of vulcanization. A 10 phr substitute of CB by NCC can help to improve aging resistance in terms of mechanical properties. In a high temperature aging condition, composites with 10 phr NCC also performed the highest storage modulus (G') among composites tested. A moderate NCC content contributed to the best retention of G' after high temperature aging, so did the incorporation of RH. With the partial replacement of CB by NCC, the temperature of 5% weight-lose had a slight drop and the apparent crosslink density showed a decrease. Thanks to the interaction of RH with both NR and NCC, composites showed an improvement in apparent crosslink density after modified by RH.
- Nanocrystalline cellulose,
- Natural rubber,
- Curing characteristics,
- Aging resistance,
- Thermal stability
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