Superlattices in block copolymer blends with attractive interactions

Markgraf, Kirsten; Abetz, Volker

doi:10.1515/epoly.2001.1.1.133

Cited by 12 publications

(16 citation statements)

References 22 publications

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“…Compared to the prominent sphere, cylinder and lamella phases, the perforated lamella is rarely observed. It has been reported for diblock copolymers [13], terpolymer coreshell systems [56][57][58] and block copolymer blends [59]. In ABC triblock terpolymer systems, the block arrangement commonly corresponds to a core-shell structure, where the middle block completely engulfs one of the end blocks leaving no interface between the A/C end blocks.…”

Section: Resultsmentioning

confidence: 99%

Controlling the shape of Janus nanostructures through supramolecular modification of ABC terpolymer bulk morphologies

Hiekkataipale

Löbling

Poutanen

et al. 2016

Polymer

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of the original manuscript:Hiekkataipale, P.; Loebling, T.I.; Poutanen, M.; Priimagi, A.; Abetz, V.; Ikkala, O.; Groeschel, A.H.: Controlling the shape of Janus nanostructures through supramolecular modification of ABC terpolymer bulk morphologies In: Polymer (2016 Abstract: Block copolymers microphase separate into a variety of bulk morphologies that serve as scaffolds, templates, masks and source for polymeric nano-particles. While supramolecular additives are common to complex within diblock copolymers to modify the morphology, the subtle effects of complexation on ABC triblock terpolymer morphologies are less explored. Here, we describe the manipulation of polystyrene-block-poly(4-vinylpyridine)-blockpoly(tert-butyl methacrylate) (PS-b-P4VP-b-PT or S4VT) triblock terpolymer bulk morphologies through supramolecular complexation with rod-like 4-(4-pentylphenylazo)phenol (5PAP).The 5PAP molecule hydrogen bonds by phenolic groups to the 4VP repeating units and with increasing molar fraction of 5PAP, initially observed P4VP cylinders flatten into elliptic cylinders until a morphological transition occurs into a third (P4VP/5PAP) lamella. At sufficient 5PAP loadings, the cylinders can even merge into a perforated P4VP lamella located at the PS/PT interface. Quaternization of the P4VP phase and re-dispersion in organic solvent allows liberating S4VT Janus nanostructures from the bulk, including Janus cylinders, nanoporous Janus membranes and Janus sheets. The manipulation of "sandwiched" microphases through supramolecular binding motifs could allow the preparation of previously inaccessible terpolymer bulk morphologies and, in case of cross-linkable phases, lead to a larger library of Janus nano-objects.

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Section: Resultsmentioning

confidence: 99%

Controlling the shape of Janus nanostructures through supramolecular modification of ABC terpolymer bulk morphologies

Hiekkataipale

Löbling

Poutanen

et al. 2016

Polymer

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“….. [12] The diblock copolymers SVand VC are both symmetrically composed and therefore self-assemble into lamellar structures. [13] Blends of Lamellar ABC with Lamellar BC or DC Block Copolymers…”

Section: Resultsmentioning

confidence: 99%

“…The details of the synthesis have been described elsewhere. [12,13] Table 1 gives the characteristics of the block copolymers used in this study.…”

Section: Experimental Partmentioning

confidence: 99%

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

Jiang

Göpfert

Abetz

2003

Macromol. Rapid Commun.

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The formation of superlattices in blends of a series of asymmetric BSV triblock terpolymers and symmetric SV or VC diblock copolymers is investigated with S being polystyrene, B being poly(1,2‐butadiene), V being poly(2‐vinylpyridine), and C being poly(cyclohexyl methacrylate). All of these triblock terpolymers and diblock copolymers by themselves self‐assemble into lamellae. Apart from various core shell morphologies, in these blends some new unexpected superstructures were obtained.A TEM micrograph of a 50/50 blend of B30S58V with S45V.magnified imageA TEM micrograph of a 50/50 blend of B30S58V with S45V.

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“…Synthesis and morphology of the SBV* miktoarm star terpolymers [9], the SB diblock copolymer [11], and the SV and VC diblock copolymers have been reported elsewhere [16]. The molecular characteristics and the morphologies are given in Tab.…”

Section: Experimental Partmentioning

confidence: 99%

Formation of superlattices in blends of 3-miktoarm star terpolymers with diblock copolymers

Abetz

Jiang

2004

E-Polymers

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In this contribution we report on the morphological structures formed in blends of microphase-separated 3-miktoarm star terpolymers of polystyrene-armpolybutadiene-arm-poly(2-vinylpyridine) (SBV*) and polystyrene-block-polybutadiene (SB), polystyrene-block-poly(2-vinylpyridine) (SV), poly(2-vinylpyridine)-block-poly(cyclohexyl methacrylate) (VC) diblock copolymers. The morphologies are characterized by transmission electron microscopy. Blends with similar morphologies as known from linear triblock terpolymers are found, like core-shell structures based on cylinders or gyroids. Other blends show very distorted morphologies, or morphologies similar to the ones found for pure 3-miktoarm star terpolymers. While attractive interactions between blocks of the two species enhance the formation of common superlattices, blends with too large diblock copolymers tend to macrophase-separate.

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Superlattices in block copolymer blends with attractive interactions

Cited by 12 publications

References 22 publications

Controlling the shape of Janus nanostructures through supramolecular modification of ABC terpolymer bulk morphologies

Controlling the shape of Janus nanostructures through supramolecular modification of ABC terpolymer bulk morphologies

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

Formation of superlattices in blends of 3-miktoarm star terpolymers with diblock copolymers

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