Abstract
Polymer micelles with polystyrene (PS) shell and poly(2-vinyl pyridine) (P2VP) core were formed with P(2VP-b-S-b-2VP) triblock copolymers in a toluene/cyclohexane mixture that was good for the PS and poor for the P2VP. Then, P2VP core parts of the polymer micelles were chemically crosslinked with 1,4-diiodobutane. The change in the hydrodynamic diameters of the micelles upon crosslinking was measured by dynamic light scattering. The shape and the size of the crosslinked products (microgels) were observed by transmission electron microscopy. Viscosity of the microgel solution was measured in the semi-dilute region. Mechanical properties of the triblock copolymer films and the flower shaped microgel films were measured by dynamic mechanical spectroscopy and thermal mechanical analysis.
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