Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
Correct answer: B. Carbon black
- A. Phosphorous
- B. Carbon black
- C. Pine oil
- D. Rosin
Explanation
Carbon black reinforces rubber by increasing toughness, strength, abrasion resistance and wearing quality. Pine oil and rosin may serve other compounding purposes, but they do not provide this main reinforcing effect.
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