Alternating Gyroid Network Structure in an ABC Miktoarm Terpolymer Comprised of Polystyrene and Two Polydienes

Dimitrios Moschovas, Gkreti-Maria Manesi, Andreas Karydis-Messinis, Georgios Zapsas, Konstantinos Ntetsikas, Nikolaos E. Zafeiropoulos, Alexey A. Piryazev, Edwin L. Thomas, Nikos Hadjichristidis, Dimitri A. Ivanov, Apostolos Avgeropoulos

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4 Scopus citations

Abstract

The synthesis, molecular and morphological characterization of a 3-miktoarm star terpolymer of polystyrene (PS, M¯n = 61.0 kg/mol), polybutadiene (PB, M¯n = 38.2 kg/mol) and polyisoprene (PI, M¯n = 29.2 kg/mol), corresponding to volume fractions (φ) of 0.46, 0.31 and 0.23 respectively, was studied. The major difference of the present material from previous ABC miktoarm stars (which is a star architecture bearing three different segments, all connected to a single junction point) with the same block components is the high 3,4-microstructure (55%) of the PI chains. The interaction parameter and the degree of polymerization of the two polydienes is sufficiently positive to create a three-phase microdomain structure as evidenced by differential scanning calorimetry and transmission electron microscopy (TEM). These results in combination with small-angle X-ray scattering (SAXS) and birefringence experiments suggest a cubic tricontinuous network structure, based on the I4132 space group never reported previously for such an architecture.
Original languageEnglish (US)
Pages (from-to)1497
JournalNanomaterials
Volume10
Issue number8
DOIs
StatePublished - Jul 31 2020

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