Healing of Early Stage Fatigue Damage in Ionomer/Fe₃O₄ Nanoparticle Composites.

ABSTRACT: This work reports on the healing of early stage fatigue damage in ionomer/nano-particulate composites. A series of poly(ethylene-co-methacrylic acid) zinc ionomer/Fe₃O₄ nanoparticle composites with varying amounts of ionic clusters were developed and subjected to different levels of fatigue loading. The initiated damage was healed upon localized inductive heating of the embedded nanoparticles by exposure of the particulate composite to an alternating magnetic field. It is here demonstrated that healing of this early stage damage in ionomer particulate composites occurs in two different steps. First, the deformation is restored by the free-shrinkage of the polymer at temperatures below the melt temperature. At these temperatures, the polymer network is recovered thereby resetting the

SUBMITTER: Post W 

PROVIDER: S-EPMC6432088 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature