Rheometers Vulcanization 14 Rubber 12 Sulfur 10 Crosslinking 8 Curing 8 Swelling 6 Vulcanization process 6 Cross-link densities 4 Crosslink density 4 Cure reaction 4 Elastic moduli 4 Glass transition 4 Isothermal curing 4 Mechanical properties 4 Mechanical variables measurement 4 Polybutadiene rubbers 4 Polybutadienes 4 Positron annihilation lifetime spectroscopy 4 Positron annihilation spectroscopy 4 Reaction kinetics 4 Strain 4 Stresses 4 Styrene 4 Styrene butadiene rubber 4 Thermal effects 4 Torque curves 4 Viscoelasticity 4 Activation energy 2 Apple 2