Influence of branching density on the cross-linkability of ethylene-octene copolymers

The Δs′ value (s′max−s′min) represents the cross-linking efficiency of peroxide, which is defined as the number of moles of chemical cross-links formed per mole of peroxide. Efficiency of peroxide is higher for EOCs with lower-octene content. The reason might be difficulty of peroxide-free radicals to attack the main chains due to increased hindrance by octene side groups.