Shape evolution control of phase-separated colloidal nanoparticles

Cathrin C. Corten; Marek W. Urban

doi:10.1039/C0PY00220H

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Polymer Chemistry

Issue 1, 2011

Encompassing all aspects of synthetic and biological macromolecules, and related emerging areas

Impact Factor 5.321 24 Issues per Year

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Shape evolution control of phase-separated colloidal nanoparticles

Cathrin C. Corten^a and Marek W. Urban*^a

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School of Polymers and High Performance Materials, The University of Southern Mississippi, Hattiesburg, USA

Polym. Chem., 2011,2, 244-250

DOI: 10.1039/C0PY00220H
Received 16 Jul 2010, Accepted 04 Aug 2010
First published online 22 Sep 2010

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These studies illustrate controlled shape synthesis of two distinct phase-separated copolymers within one colloidal nanoparticle which consists of poly(methylmethacrylate) (p-MMA)/n-butylacrylate (nBA) and poly(nBA)/pentafluorostyrene (p-PFS) phases. Using sequential free radical polymerization, particle morphologies ranging from acorn to ellipsoidal, core–shell, and spherical were produced by adjusting the glass transition temperature (T_g) via compositional gradients during copolymerization. These studies show for the first time that in order to achieve desirable asymmetric particle shapes, the T_g as well as interfacial surface tension between two copolymers within one nanoparticle should be maintained during and after polymerization.

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