Properties of Activated Carbon Blacks Filled SBR Rubber Composites

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon Letters / 9권 / 2호
ㆍ저자명 : Geyou Ao, Quanli Hu and Myung-Soo Kim

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

한국어 초록

Rubber reinforcing carbon black N330 was treated by physical activation under CO2 to different degrees of burn-off. The mechanical properties indicating the reinforcement of SBR (Styrene-Butadiene Rubber) vulcanizates filled by activated carbon blacks, such as tensile strength, modulus at 300% strain and elongation at break were determined. During CO2 activation of fresh carbon blacks, the development of microporous structure caused an increase of extremely large specific surface area and the porosity turned out to be an increasing function of the degree of burn-off. The tensile strength and modulus at 300% of activated carbon blacks filled rubber composites were improved at lower loading ratios of 20 and 30 phr, but decreased drastically after 30 phr, which is considered that it might be difficult to get a fully dispersed rubber mixture at higher loading ratios for fillers having very large specific surface areas. However, the Electromagnetic Interference (EMI) shielding effectiveness of SBR rubber composites having activated carbon black at 74% yield were improved at a large extent
when compared to those having raw carbon black and increased significantly as a function of increasing loading ratio.

Keywords : Carbon black, CO2 activation, Rubber reinforcement, EMI shielding effectiveness

영어 초록

Rubber reinforcing carbon black N330 was treated by physical activation under CO2 to different degrees of burn-off. The mechanical properties indicating the reinforcement of SBR (Styrene-Butadiene Rubber) vulcanizates filled by activated carbon blacks, such as tensile strength, modulus at 300% strain and elongation at break were determined. During CO2 activation of fresh carbon blacks, the development of microporous structure caused an increase of extremely large specific surface area and the porosity turned out to be an increasing function of the degree of burn-off. The tensile strength and modulus at 300% of activated carbon blacks filled rubber composites were improved at lower loading ratios of 20 and 30 phr, but decreased drastically after 30 phr, which is considered that it might be difficult to get a fully dispersed rubber mixture at higher loading ratios for fillers having very large specific surface areas. However, the Electromagnetic Interference (EMI) shielding effectiveness of SBR rubber composites having activated carbon black at 74% yield were improved at a large extentwhen compared to those having raw carbon black and increased significantly as a function of increasing loading ratio.Keywords : Carbon black, CO2 activation, Rubber reinforcement, EMI shielding effectiveness

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