Sumitomo Rubber, in collaboration with professors at Tohoku University’s Institute of Multidisciplinary Research for Advanced Materials, has succeeded in visualizing the nanometer-scale distribution of strain-induced crystallization inside polyisoprene rubber, a synthetic polymer with the same chemical structure as natural rubber. In general, when rubber is subjected to large deformations, the polyisoprene molecular chains are stretched, causing strain-induced crystallization, which is…