Switching supramolecular polymeric materials with multiple length scales

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • University of Helsinki
  • VTT Technical Research Centre of Finland
  • University of Groningen


It was demonstrated that polymeric supramolecular nanostructures with several length scales allow straightforward tailoring of hierarchical order- disorder and order-order transitions and the concurrent switching of functional properties. Poly(4-vinyl pyridine) (P4VP) was stoichiometrically protonated with methane sulfonic acid (MSA) to form P4VP(MSA)1.0, which was then hydrogen-bonded to pentadecylphenol. Microphase separation, re- entrant closed-loop macrophase separation, and high-temperature macrophase separation were observed. When MSA and pentadecylphenol were complexed to the P4VP block of a microphase-separated diblock copolymer poly[styrene-block- (4-vinyl pyridine)], self-organized structures-in-structures were obtained whose hierarchical phase transitions can be controlled systematically. This microstructural control on two different length scales (in the present case, at 48 and 350 angstroms) was then used to introduce temperature-dependent transition in electrical conductivity.


Original languageEnglish
Pages (from-to)557-560
Number of pages4
Issue number5363
Publication statusPublished - 24 Apr 1998
MoE publication typeA1 Journal article-refereed

ID: 4704650