The kinetics of end crosslinking in linear polymer melts and the dynamics of the resulting networks is studied using molecular dynamics simulations. Starting from an equilibrated melt, tri- and tetrafunctional crosslinkers are attached randomly to a fraction x of the chain ends. When a free end...

The transfer matrix evaluation of the elastic constants of random bond honeycomb lattices was applied to mixtures of rigid and normal elastic bonds and to diluted networks. At least three exponents (T ∼ 4, S ∼ 1.3 and T′ ∼ 1.3) are required to describe the critical behavior.

Electrical properties of metal-insulator composites are described by power law behavior when the concentration of metal p approaches the percolation threshold pc. The conductivity σ, the Hall conductivity λ, and the Hall coefficient R satisfy σ ∼(p − pc)t, λ ∼(p − pc)τ, R ∼(p −...