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The percentage of butadiene and styrene in Buna-S is ____________

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in Engineering Chemistry I by (506k points)
The percentage of butadiene and styrene in Buna-S is ____________

(a) 50% each

(b) 60% and 40% respectively

(c) 80% and 20% respectively

(d) 75% and 25% respectively

The question was asked in final exam.

My doubt is from Elastomers in division Polymers of Engineering Chemistry I

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Right answer is (d) 75% and 25% respectively

The explanation is: The percentage of butadiene and styrene in Buna-S is 75% and 25% respectively. These materials have good abrasion resistance and good aging stability when protected by additives.

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