Self-Assembled Poly(4-vinylpyridine)−Surfactant Systems Using Alkyl and Alkoxy Phenylazophenols

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• 作者：Joost de Wit ; Gert Alberda van Ekenstein ; Evgeny Polushkin ; Kristina Kvashnina ; Wim Bras ; Olli Ikkala ; Gerrit ten Brinke
• 刊名：Macromolecules
• 出版年：2008
• 出版时间：June 24, 2008
• 年：2008
• 卷：41
• 期：12
• 页码：4200 - 4204
• 全文大小：1030K
• 年卷期：v.41,no.12(June 24, 2008)
• ISSN：1520-5835

文摘

Para-substituted alkyl and alkoxy phenylazophenols (PAP’s) have been synthesized and used as hydrogen-bonded side chains for poly(4-vinylpyridine)-based comb-shaped supramolecules akin to the well-studied poly(4-vinylpyridine)/pentadecylphenol systems. In this paper we report the self-assembly of these new materials as investigated by DSC and simultaneous SAXS/WAXS. The systems exhibit smectic ordering with a periodicity in the range of 3.0−4.2 nm. The periodicity length scale, the order−disorder transition temperature (T_ODT), and the glass transition temperature T_g of the self-assembled systems all increase with increasing alkyl chain length. The correlation between T_ODT and T_g observed is argued to be the consequence of the increasing segregation in the self-assembled systems with increasing alkyl tail length of the amphiphiles.