Nylon-6.6 cross-links relatively easily, especially in the presence of air whereas nylon-ll and nylon-12 cross-link very little, Strong mineral acids, strong bases, and some oxides or salts of transition metals catalyze the thermal decomposition of nylons, but minimize cross-linking.
In contrast, many fire-retardant additives promote secondary reactions, cross-linking, and charring of aliphatic polyamides. 2.5.5.4 Polymer Stabilization The question regarding degradation and stabilization of polyamides has been dealt with elsewhere. Lanska et al. [16gl reviewed aging and durability, degradation, stabilization, and resistance to biological effects. The degradation reactions comprise reactions initiated by radiation, light, oxygen, heat, and both mechanical and thermal energies. The extent of these