Catalyst incorporation, self-healing polymers

During the last years ROMP has been developed to generate self-healing polymers. In these polymers droplets of dicyclopentadiene and of Grubbs-catalyst are incorporated. When the polymer cracks the droplets burst open, the catalyst comes into contact with the monomer and the plastic ideally heals itself [111]. This methodology is still far from application but it does indicate the power of ROMP. 

Using NRs, White and coworkers developed self-repaired polymers. This approach was based on incorporation of microcapsules loaded with healing agents, dicyclopentadiene monomers, and using a proper catalyst in epoxy matrix. Formation of cracks ruptured the microcapsules and released healing... 

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