Switching supramolecural polymeric materials with multiple lenght scales

Janne Ruokolainen, R. Mäkinen, Mika Torkkeli, Tapio Mäkelä, Ritva Serimaa, Gerrit ten Brinke, Olli Ikkala

Research output: Contribution to journalArticleScientificpeer-review

656 Citations (Scopus)


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 transitions in electrical conductivity.
Original languageEnglish
Article number557
Issue number5363
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Switching supramolecural polymeric materials with multiple lenght scales'. Together they form a unique fingerprint.

Cite this