Concurrent Order in a Semi-Crystalline Diblock Copolymer Involving Complexation with a Mesogen

Wang, Jingbo; Odarchenko, Yaroslav; Defaux, Matthieu; Lejnieks, Jānis; Ahokhin, Denis V.; Keul, Helmut; Ivanov, Dimitri A.; Möller, Martin; Mourran, Ahmed

doi:10.1021/ma4008797

Cited by 7 publications

(8 citation statements)

References 37 publications

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“…The rigidity of the mesogenic portion imparts the rod‐like chain structure. Here, crystallization of the coil block is influenced by the phase behavior of the ordered microphase separation as well as the rigidity of the LC block . LC properties of these materials will not be discussed.…”

Section: Unique Block Copolymers and Their Assembliesmentioning

confidence: 99%

“…Steric interaction of LC block mesogens provides long persistence lengths that give the LC block rigid, rod‐like properties similar to conjugated polymer backbones. Some studies have been performed looking at the influence of these LC blocks on the crystallization of PCL blocks, PEO blocks, and PLLA …”

Section: Unique Block Copolymers and Their Assembliesmentioning

confidence: 99%

“…Bulk properties have been studied for PEO and PLLA . Poly(perfluorooctylethyl acrylate) (PFA‐C 8 ) is an LC polymer that exhibits a highly ordered smectic phase that resembles a disordered crystal phase due to low mobility .…”

Section: Unique Block Copolymers and Their Assembliesmentioning

confidence: 99%

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Recent progress in block copolymer crystallization

Horn

Steffen

O'Connor

2018

Polymer Crystallization

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Block copolymers (BCPs) are important for technological advances in numerous industries, including but not limited to, electronics, biomedical, optics, environmental, and infrastructure. Because of their ubiquity, it is important to understand their hierarchical phase behavior to tune their macroscopic properties for efficient use. These macroscopic properties are derived from the microscopic self‐assembled structures. One unique form of hierarchical assembly exists when one or more of the polymeric blocks form lamellar crystals. These crystals are integral to understanding and predicting the macroscopic behavior. This review reports on recent advances in crystallization of BCPs, including bulk and solution assembly. Reports highlighting development in fundamental processes regarding crystallization mechanisms and behavior as well as for the design of practical applications are included.

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Section: Unique Block Copolymers and Their Assembliesmentioning

confidence: 99%

Section: Unique Block Copolymers and Their Assembliesmentioning

confidence: 99%

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Recent progress in block copolymer crystallization

Horn

Steffen

O'Connor

2018

Polymer Crystallization

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“…[8,11,12] Furthermore, microphase separation of block copolymers can form ordered microdomains with dimensions of a few nanometers to hundreds of nanometers, and lamellar or columnar periodically ordered-membrane can be made. [12][13][14] In all, block copolymers can be spontaneously constructed well-ordered periodic structures and have wide applications in the fields of lithography, industrial catalysis, biomedical, and optoelectronics technology. [5,8,15,16] As one unique species, semi-crystalline BCPs, which contain at least one crystallizable chain segment, have aroused wide concern in the last decade.…”

Section: Introductionmentioning

confidence: 99%

Polymethylene-b-poly(acrylic acid) diblock copolymers: Morphology and crystallization evolution influenced by polyethyene polyamine with dual confinement effects

Yuan

Chen

et al. 2017

Polymer

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In this work, we systematically investigated the aggregation and confined crystallization behavior of polymethylene-b-poly acrylic acid diblock copolymers (PM-b-PAA, M93A94) under the influence of polyethyene polyamine (PPA). With the increasing molar ratio of PPA, the morphologies of PM-b-PAA micelles experienced sphere-to-band-to-sheet transformations with regular changes of sizes on cooling from 80 °C mixed solution. Further investigation of the crystalline feature of PM-b-PAA indicated that the crystallization of PM block was profoundly restrained by PPA with the dual confinements, i.e., chemical and physical confinement which exerted through the hierarchical hydrogen bonding and 3D hydrogel network, respectively, in the mixed system. In particular, when the PPA and PM-b-PAA aqueous solution were mixed with equivalent volume, hydrogels was accessible. And rheology property indicated that the BCP/PPA-0.5 hydrogels hold the maximal storage modulus G′, and meanwhile the minimum loss tangent, tanδ.

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“…By incorporating them into supramolecules, one can potentially control their orientation and macroscopic alignment and improve their processability. A number of different LC moieties have seen use in supramolecular systems, including (alkoxybenzoyloxy)benzoate, biphenyl, − cholesterol, − and azobenzene. ,− Nonlinear shapes, such as wedges, have also been investigated. − These materials have demonstrated responsiveness to different stimuli including thermal, electrical, and magnetic stimuli. Organic semiconductor-based supramolecules have also become a topic of interest in recent years.…”

Section: Introductionmentioning

confidence: 99%

Organic Semiconductor-Containing Supramolecules: Effect of Small Molecule Crystallization and Molecular Packing

Rancatore

Kim

Mauldin³

et al. 2016

Macromolecules

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Small molecules (SMs) with unique optical or electronic properties provide an opportunity to incorporate functionality into block copolymer (BCP)-based supramolecules. However, the assembly of supramolecules based on these highly crystalline molecules differs from their less crystalline counterparts. Here, two families of organic semiconductor SMs are investigated, where the composition of the crystalline core, the location (side- vs end-functionalization) of the alkyl solubilizing groups, and the constitution (branched vs linear) of the alkyl groups are varied. With these SMs, we present a systematic study of how the phase behavior of the SMs affects the overall assembly of these organic semiconductor-based supramolecules. The incorporation of SMs has a large effect on the interfacial curvature, the supramolecular periodicity, and the overall supramolecular morphology. The crystal packing of the SM within the supramolecule does not necessarily lead to the assembly of the comb block within the BCP microdomains, as is normally observed for alkyl-containing supramolecules. An unusual lamellar morphology with a wavy interface between the microdomains is observed due to changes in the packing structure of the small molecule within BCP microdomains. Since the supramolecular approach is modular and small molecules can be readily switched out, present studies provide useful guidance toward access supramolecular assemblies over several length scales using optically active and semiconducting small molecules.

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Concurrent Order in a Semi-Crystalline Diblock Copolymer Involving Complexation with a Mesogen

Cited by 7 publications

References 37 publications

Recent progress in block copolymer crystallization

Recent progress in block copolymer crystallization

Polymethylene-b-poly(acrylic acid) diblock copolymers: Morphology and crystallization evolution influenced by polyethyene polyamine with dual confinement effects

Organic Semiconductor-Containing Supramolecules: Effect of Small Molecule Crystallization and Molecular Packing

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