1. East Centre, Indian Rubber Manufacturers Research Association Thane 400604 Maharashtra India
2. Department of Elastomers, Leibniz‐Institut für Polymerforschung Dresden e.V., Hohe Straße 6 Dresden 01069 Germany
3. Rubber Technology CentreIndian Institute of Technology Kharagpur West Bengal 721302 India
4. Department of PhysicsJadavpur University Kolkata 700032 India