Preparation and anti‐migration performance of ethylene propylene diene terpolymer composites modified with GO‐SiO ₂ hybrid nanomaterials

Abstract

The anti‐migration ethylene propylene diene terpolymer ( EPDM) inhibitor coating was prepared by using EPDM as a composite matrix and silicon‐functionalized graphene oxide ( GO‐SiO ₂ ) as modifiers to prevent the migration of energetic plasticizers in propellants. The anti‐migration performance at different temperatures was analyzed by investigating the diffusion of dioctyl sebacate ( DOS) using thermal analysis and immersion tests. After adding 1.0 wt% GO‐SiO ₂ , the overall performance of the inhibitor coating was the best, and the concentration of DOS that migrated into the inhibitor coating at 30 °C was reduced from 45.1% to 38.8% (13.9% decrease). The results confirmed that the introduction of GO‐SiO ₂ prevented the migration of dioctyl sebacate to the EPDM inhibitor coating. The scanning electron microscopy results showed that GO‐SiO ₂ was well‐dispersed in the inhibitor coating, and the tensile strength increased from 1.80 to 2.11  MPa. Migration kinetics analysis showed that the anti‐migration performance was closely related to the crosslink density.