Abstract
Acid-catalyzed hydrolysis of 2,5-dimethyl-2,5-hexanediol dimethacrylate (DHDMA)-containing nanoparticles has been carried out to bring about topological reorganization from spherical macromolecular cross-linked particles to linear polymer. The reactive cross-linked poly(methyl methacrylate)-based (x-PMMA) nanoparticles have been prepared via aqueous emulsion techniques where the size of the particles depends upon the type of emulsion polymerization employed, surfactant-free or surfactant-based. Potassium persulfate has been employed as the water-soluble initiator and sodium dodecyl sulfate as the surfactant. Because of the acid-sensitive nature of the tertiary ester groups of the 2,5-dimethyl-2,5-hexanediol dimethacrylate within the cross-linked nanoparticles, they can be easily cleaved into their linear polymer chain composition under acidic conditions. The particles were degraded by heating in dioxane in the presence of p-toluenesulfonic acid at 100 °C for 12 h. The cleavage of the cross-linked nanopart...
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