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| Naji, M. |
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| Ertürk, Emre |
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| Azevedo, Nuno Monteiro |
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Schulze, Morgan W.
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Publications (5/5 displayed)
- 2017Thermal processing of diblock copolymer melts mimics metallurgycitations
- 2017Effects of Tailored Dispersity on the Self-Assembly of Dimethylsiloxane-Methyl Methacrylate Block Co-Oligomerscitations
- 2015Evolution of morphology, modulus, and conductivity in polymer electrolytes prepared via polymerization-induced phase separationcitations
- 2015Poly(cyclohexylethylene)-block-poly(ethylene oxide) Block Polymers for Metal Oxide Templatingcitations
- 2014High-modulus, high-conductivity nanostructured polymer electrolyte membranes via polymerization-induced phase separationcitations
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article
Effects of Tailored Dispersity on the Self-Assembly of Dimethylsiloxane-Methyl Methacrylate Block Co-Oligomers
Abstract
<p>The effect of dispersity on block polymer self-assembly was studied in the monodisperse limit using a combination of synthetic chemistry, matrix-assisted laser desorption ionization spectroscopy, and small-angle X-ray scattering. Oligo(methyl methacrylate) (oligoMMA) and oligo(dimethylsiloxane) (oligoDMS) homopolymers were synthesized by conventional polymerization techniques and purified to generate an array of discrete, semidiscrete, and disperse building blocks. Coupling reactions afforded oligo(DMS-MMA) block polymers with precisely tailored molar mass distributions spanning single molecular systems (D= 1.0) to low-dispersity mixtures (d ≈ 1.05). Discrete materials exhibit a pronounced decrease in domain spacing and sharper scattering reflections relative to disperse analogues. The order-disorder transition temperature (T<sub>ODT</sub>) also decreases with increasing dispersity, suggesting stabilization of the disordered phase, presumably due to the strengthening of composition fluctuations at the low molar masses investigated.</p>