Which one of the following conditions does not resemble to hot nitrile rubbers?

Which one of the following conditions does not resemble to hot nitrile rubbers? Correct Answer high temperature 25-50 C

Hot nitrile rubbers are formed by copolymerization at around 25-50 C which have characteristic toughness due to the presence of gels and branch units in polymer chains.
Bissoy MCQ

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