Crosslink density 6 Crosslinking 6 Curing 6 Vulcanization 6 Conformational tube model 4 Conformations 4 Elasticity 4 Mathematical models 4 Molecular structure 4 Rubber 4 Strain measurement 4 Stresses 4 Swelling 4 Characterization 2 Conformation tube model 2 Density (specific gravity) 2 Equilibrium volume swelling measurement 2 Mechanical analysis 2 Mechanical variables measurement 2 Microscopic lateral tube dimension 2 Mobile network chain 2 Molecular parameter 2 Molecular weight 2 NR vulcanizates 2 Network structure 2 Parameter estimation 2 Rheometers 2 Root-mean-square end-to-end distance 2 Separation 2 Strain 2