REINFORCEMENT OF NATURAL RUBBER WITH FLY ASH FROM DIFFERENT LOCAL SOURCES
Keywords:
Natural rubber, fly ash, silica, reinforcing fillerAbstract
This article used of fly ash (FA) particles from various sources in Thailand as reinforcing filler in NR compounds, in comparison with commercial silica. In this work, the FA particles were obtained from Mae Moh, Rayong, and Banphong. The fly ash and commercial silica were treated by 2 %wt Si69 and mixed in natural rubber at loadings from 30 to 75 phr. The properties of all NR vulcanizates were evaluated through cure characteristics, mechanical properties (tensile, tear, hardness, resilience and compression set properties). The results indicated that fly ash particles from all sources could be used as potentially reinforcing filler in NR compounds. It was recommended that FA particles could be used to replace commercial silica at the loading of 30 phr, these giving similar mechanical properties (tensile, tear and hardness properties) to the commercial silica filled NR compounds. The FA/NR vulcanizates had better elastic properties than the commercial silica/NR vulcanizates, the effect being more pronounced for the fly ash from Mae Moh.
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