325186 In Buna-S symbol 'Bu' stands for
In Buna-S (SBR, styrene butadiene rubber), the symbol ' \(\mathrm{Bu}\) ' stands for 1,3-butadiene \(\left(\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_{2}\right)\).