Nanocomposites composed of hydrogenated nitrile rubber/magnesium methacrylate/organic montmorillonite (HNBR/PMgMA/OMT) were prepared by in situ polymerization and mixing intercalation.The structure

morphology and properties of the nanocompostie were investigated by XRD

SEM

TEM

etc.The nano-micro coexistence structure was formed by PMgMA ion clusters and MgMA monomer.MgMA significantly enhanced the properties of HNBR composites.HNBR/PMgMA/OMT nanocomposites have favorable processing

mechanical properties and resistant aging properties in different media.TEM images revealed that MgMA can help OMT in exfoliating and dispersing

while the composition of MgMA/OMT facilitated the peeling and dispersion of OMT.OMT in the vulcanizates formed a microstructure mainly caused by exfoliation and intercalation

and also by the coexistence of de-intercalation and un-intercalation.SEM results indicated that the interface bonding can be significantly improved with a mixing ratio of MgMA/OMT as 20/10

therefore

the tensile strength

elongation at break and permanent deformation reached 30.2 MPa

520% and 30%

respectively; meanwhile

the hot air

oil and water resistant properties were also improved apparently.An aging coefficient of 0.61

0.63 and 0.84 was attained after aging at 165℃ in air

water and oil

respectively

for 14 days.And the resistant aging property of medium is higher than that of the HNBR composite reinforced by carbon black and MgMA

respectively.The improvement of aging resistance in different media is mainly due to the better dispersed layer structure of organic montmorillonite.