Because a wide range of coagents are available, the selection of coagents for achieving optimum properties is paramount.
The reactivity of coagents also depends on the elastomer, and the nature of the cross-links formed determines the properties of the resulting network. Cross-link density of the NR–DCP system with different coagents was measured using equilibrium swelling studies in toluene.
Comparison of cross-link densities and tensile strengths of various coagents with a control (gum vulcanizate) is shown in Figure 9.