Superlattice Structures in Morphologies of the ABC Triblock Copolymers

Mogi, Yasuhiro; Nomura, Mahito; Kotsuji, Hiroyuki; Ohnishi, Kouki; Matsushita, Yushu; Noda, Ichiro

doi:10.1021/ma00101a013

Cited by 233 publications

(261 citation statements)

References 5 publications

Supporting

Mentioning

245

Contrasting

Unclassified

Order By: Relevance

“…25 Part of the novelty of this work is in showing how one material can be complexed at one set of sites or at a different set, depending on the pH at which that complexation is carried out. Additionally, given the wide variety of complex mesophases predicted and observed experimentally in ''simple'' A-B-C triblock copolymers, [26][27][28] the addition of a block or blocks which can be supramolecularly complexed provides even more possibilities for material design. Details of the morphologies obtained in our HAS and HAS-based complexes, as elucidated by small-and wide-angle X-ray scattering (SAXS/WAXS) and transmission electron microscopy (TEM), are compared against previous results and predictions for uncomplexed linear and heteroarm star block copolymers, 29 as well as against linear diblock comb-coil complexes.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Hammond

Tsitsilianis

et al. 2009

Soft Matter

View full text Add to dashboard Cite

A novel heteroarm star block terpolymer bearing short polystyrene (PS) arms and an equal number of longer poly(2-vinylpyridine)-block-poly(acrylic acid) (P2VP-b-PAA) arms was used as the macromolecular template component in polyelectrolyte-surfactant supramolecular complexes. The ampholytic nature of this novel star block copolymer allowed complexation to be carried out on either the P2VP blocks (with negatively charged surfactants) or on the PAA blocks (with positively charged surfactants), depending only on the pH at which the complexation reaction was carried out. The various complexes displayed self-organization on both the length scale of the polyelectrolyte-surfactant complexes (ca. 3.5-4 nm) and on the length scale of the overall heteroarm star block copolymer (18-39 nm, depending on which block had been complexed). Addition of surfactants to one block versus the other results in dramatically different morphologies; when the P2VP blocks are complexed, closepacked spheres are observed, while when the PAA blocks are complexed, the material forms core-shell cylinders (PS and P2VP composing the core and shell, respectively) in a matrix of PAA(surfactant). The morphologies are discussed by combining both real-space techniques, such as transmission electron miscroscopy, and reciprocal space techniques, such as X-ray scattering at small and large angles.

show abstract

Section: Introductionmentioning

confidence: 99%

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Hammond

Tsitsilianis

et al. 2009

Soft Matter

View full text Add to dashboard Cite

show abstract

“…32,33 To extend the capability and applicability of the topology-transformable systems based on M2R, we synthesized a topology transformable ABC terpolymer. 82 A pseudo [2]rotaxane initiator (3F) capable of linking three polymer chains by the rotaxane linkage was designed as the key trifunctional compound for the star polymer synthesis (Scheme 12).…”

Section: Topology-transformable Polymers T Takata and D Aokimentioning

confidence: 99%

“…Matsushita and colleagues 32,33 reported the interesting topologydependent morphology of two types of three-component polymers with linear and star shapes. As shown in Figure 3, the linear ABC triblock copolymer and star polymer composed of three different polymer chains show unique characteristics, such as microphase-separated structures, owing to their topology.…”

Section: Introductionmentioning

confidence: 99%

“…As shown in Figure 3, the linear ABC triblock copolymer and star polymer composed of three different polymer chains show unique characteristics, such as microphase-separated structures, owing to their topology. 32,33 It is no wonder that these two polymers with different topologies cannot interconvert unless the covalent bond is broken and rearranged.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Topology-transformable polymers: linear–branched polymer structural transformation via the mechanical linking of polymer chains

Takata

Aoki

2017

Polym J

View full text Add to dashboard Cite

In this review article, we discuss the synthesis and dynamic nature of macromolecular systems that have mechanically linked polymer chains capable of undergoing a topology transformation driven by a rotaxane molecular switch. The rotaxane linking of polymer chains plays a crucial role in these systems. A linear polymer possessing a crown ether/sec-ammonium salt-type [1] rotaxane moiety at the axle chain terminal was prepared via the rotaxane linking of a single polymer chain. A linear-cyclic polymer topology transformation was achieved via the movement of the wheel component from one end to the other end of the axle component using the rotaxane macromolecular switch function. The successful synthesis of a macromolecular [2]rotaxane (M2R) possessing a single polymer axle and one crown ether wheel led to a variety of unique applications, such as the development of topology-transformable polymers and the synthesis of rotaxane crosslinked polymers (RCPs). The introduction of a polymer chain to the wheel component of M2R (rotaxane linking of two polymer chains) produced a rotaxane-linked AB block copolymer that transformed its topology from linear to branched. Furthermore, a rotaxane-linked three-component polymer and an ABC triblock copolymer were synthesized and transformed to the corresponding 3-arm star (co)polymers, and the transformation was confirmed by measuring the hydrodynamic volume change. The structural transformation of 4-arm and 6-arm star polymers was also accomplished using the dynamic mobility of a similar rotaxane. As a useful application, M2R-based vinylic crosslinkers (RCs) were prepared and applied to the synthesis of RCPs, whereby the addition of RCs into radical polymerization systems of vinyl monomers afforded polymers with excellent toughness by enhancing both of tradeoff properties that cannot be achieved using typical covalent crosslinkers.

show abstract

“…At first, we investigated the micro phase separation structure of the PS-b-PMAPOSS-b-PMMA 1, which has the composition creating the three-domain lamella in the reported triblock terpolymer such as PS-b-poly(isoprene)-b-PMMA and PI-b-PS-b-poly(ethylene oxide) [10,11]. The SAXS profile displayed five scattering peaks, which ratio was 1 : 3 1/2 : 2 : 3 : 5.…”

Section: Bulk Morphological Characterizationmentioning

confidence: 99%

Formation of Ultra Narrow Lamellar Structures in POSS-containing Triblock Terpolymers

Goseki

Ishizune

Hirao

et al. 2013

J. Photopol. Sci. Technol.

View full text Add to dashboard Cite

An ultra narrow line structure was prepared in the lamellar morphology of polyhedral oligomeric silsesquioxane (POSS)-containing triblock terpolymer in the bulk via the self-assembly.The triblock terpolymers, which comprised polystyrene, POSS-containing poly(methacrylate) (PMAPOSS) and poly(methyl methacrylate), were synthesized by anionic polymerization. The self-assembled structures were studied by using a transmission electron microscopy (TEM) and a small-angle X-ray scattering (SAXS). It was found that a narrow PMAPOSS domain was layered in triple-domain lamellar, which caused by the effect of strongly segregation with the middle PMAPOSS block. The total d-spacing was 32 nm, and the smallest width of PMAPOSS domain layer was ca. 4 nm.

show abstract

Superlattice Structures in Morphologies of the ABC Triblock Copolymers

Cited by 233 publications

References 5 publications

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Topology-transformable polymers: linear–branched polymer structural transformation via the mechanical linking of polymer chains

Formation of Ultra Narrow Lamellar Structures in POSS-containing Triblock Terpolymers

Contact Info

Product

Resources

About