Mesomorphic structures in flexible polymer-surfactant systems due to hydrogen bonding: Poly(4-vinylpyridine)-pentadecylphenol

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Researchers

Research units

  • University of Helsinki

Abstract

Properly selected hydrogen bonding suffices to induce mesomorphic structures in mixtures of flexible polymers and nonmesogenic surfactants. For poy(4-vinylpyridine)-3-pentadecylphenol (P4VP-(PDP)x) complexes, the long period of the lemellar structure decreases as x-1 (x is the number of PDP molecules per P4VP repeat unit) in complete contrast to similar polyelectrolyte systems. Upon cooling from 80 °C to the room temperature, the long period gradually increases and levels off at around 30 °C at a value which is approximately 4 Å above the starting value. After an induction time, a structural transformation occurs in the highly complexed samples, due to the crystallization of the alkyl side chains. It is accompanied by a sudden decrease in the long period of approximately 5 Å. However, the structure is not stable and after an additional induction time both structures are present in the samples. Arguments to explain most of the observed phenomena will be given.

Details

Original languageEnglish
Pages (from-to)3409-3415
Number of pages7
JournalMacromolecules
Volume29
Issue number10
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed

ID: 4687591