Designed kinetic pathways and significant temporal stabilities of different micelles and nanoscale aggregates have been used to construct exotic nanoparticles in solution. Due to low chain exchange dynamics between block copolymeric micelles and solvent, global thermodynamic equilibrium is extremely difficult, if not impossible, to achieve in block copolymer assembly. However, by taking advantage of this slow kinetic behavior of polymeric micelles in solution, one can purposely produce multicompartment nanoparticles and mulitgeometry nanoparticles by forcing different block copolymers to reside in the same nanoscale structure through kinetic processing. While kinetically trapped in common nanostructures, local phase separation can occur producing compartments. This compartmentalization can be used within common micelle geometries to make complex spheres and cylinders or can be used to make new nanostructures such as multigeometry, hybrid cylinder-sphere, disk-cylinder or disk-sphere nanoparticles.  The complexity made possible through assembly with kinetic control will be discussed in addition to the importance of understanding the effects of different kinetic pathways.

Exotic nanoparticles from block copolymer design and solution construction with kinetic control

247th National Meeting (2014)

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