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Cylindrical Micelles from the Self-Assembly of Polyacrylonitrile-Based Diblock Copolymers in Nonpolar Selective Solvents

✍ Scribed by Massimo Lazzari; Dominique Scalarone; Carlos Vazquez-Vazquez; M. Arturo López-Quintela

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
361 KB
Volume
29
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A series of polyacrylonitrile‐block‐polystyrene (PAN‐b‐PS) and polyacrylonitrile‐block‐poly(methyl methacrylate) (PAN‐b‐PMMA) diblock copolymers with PAN volume fraction up to 20% self‐assembles in nonpolar selective solvents to form cylindrical micelles with a PAN core, having contour length varying between less than 1 µm and tens of micrometers. Micelle characterization by differential light scattering, nuclear magnetic resonance, transmission electron microscopy, atomic force microscopy and differential scanning calorimetry enabled to point out the role played by crystallinity during micellization, thence suggesting that the core crystallization force overcomes other factors governing self‐assembling processes.

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✍ Wei Li; Wei Jiang 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 265 KB

## Abstract Real‐space self‐consistent field theory (SCFT) is employed to study the effect of solvent molecular size on the self‐assembly of amphiphilic diblock copolymer in selective solvent. The phase diagrams in wide ranges of interaction parameters and solvent molecular size were obtained in pr