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3D-TEM study on the novel bicontinuous microdomain structure

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Abstract

An ordered bicontinuous double-diamond (OBDD) morphology was found in polystyrene-block-(poly-4-vinylphenyldimethylvinylsilane-graft-polyisoprene), PS-b-(PVS-g-PI), block–graft copolymer. We obtained a 3D image of the microdomain structure formed in PS-b-(PVS-g-PI) using 3D-TEM. The 3D image shows that the polystyrene (PS) phase consists of two independent and interwoven networks. The structures of the two networks are identical and include tetrapod units that form planar six-membered rings. The features of the networks agree with those in the OBDD morphology, indicating that PS-b-(PVS-g-PI) exhibits ordered three-dimensional OBDD networks with the PS phase in the polyisoprene (PI) matrix phase. The grafted PI chains induce the frustration of the PS chains; thus, the effects of the specific interface are more dominant than those of packing frustration in the formation of the morphology, and the OBDD phase is stabilized.

Graphical abstract: 3D-TEM study on the novel bicontinuous microdomain structure

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Publication details

The article was received on 22 Aug 2017, accepted on 01 Nov 2017 and first published on 01 Nov 2017


Article type: Paper
DOI: 10.1039/C7SM01688C
Citation: Soft Matter, 2017, Advance Article
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    3D-TEM study on the novel bicontinuous microdomain structure

    Y. Wang, M. Wakabayashi, H. Hasegawa and M. Takenaka, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM01688C

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