Fig. 2

Simplified chemical structure of SIBS Where M > > N. M = number of isobutylene units; N = number of styrene units; SIBS = poly (styrene-block-isobutylene-block-styrene).
Simplified chemical structure of SIBS Where M > > N. M = number of isobutylene units; N = number of styrene units; SIBS = poly (styrene-block-isobutylene-block-styrene).