Buna S rubbers consisting of over 50% styrene are considered as _________

Buna S rubbers consisting of over 50% styrene are considered as _________ Correct Answer Plastic

Buna S (SBR) rubbers differ and quality and grades with respect to the amount of styrene and butadiene. Low-temperature resistant rubber may only contain 9% styrene whereas 44% styrene has good flow characteristics. When the amount of styrene exceeds 50%, it is considered plastic.
Bissoy MCQ

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