Conductivity of diblock copolymer system filled with conducting nano‐particles: Effect of copolymer morphology

Chervanyov, A. I.

doi:10.1002/pol.20210729

Cited by 3 publications

(5 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The role of fillers for the stability of a blend, therefore, reduces to the purely osmotic effect described in the next subsection in detail. As has been shown in our previous work in [38][39][40], this osmotic effect is responsible for the localization of fillers at the interfaces between the microphases of diblock copolymer systems. We surmise that a similar effect explains the interfacial localization of fillers in the polymer blends observed, e.g., in [3] for the (PS)-grafted silica nanofillers in the polystyrene-co-acrylonitrile (SAN)-poly(methil matacrylate) (PMMA) blend.…”

Section: Theory 21 the Condition Of The Spinodal Decomposition Of Fil...supporting

confidence: 68%

Spinodal Decomposition of Filled Polymer Blends: The Role of the Osmotic Effect of Fillers

Chervanyov

2023

Polymers

Self Cite

View full text Add to dashboard Cite

The reported work addresses the effect of fillers on the thermodynamic stability and miscibility of compressible polymer blends. We calculate the spinodal transition temperature of a filled polymer blend as a function of the interaction energies between the blend species, as well as the blend composition, filler size, and filler volume fraction. The calculation method relies on the developed thermodynamic theory of filled compressible polymer blends. This theory makes it possible to obtain the excess pressure and chemical potential caused by the presence of fillers. As a main result of the reported work, we demonstrate that the presence of neutral (non-adsorbing) fillers can be used to enhance the stability of a polymer blend that shows low critical solution temperature (LCST) behavior. The obtained results highlight the importance of the osmotic effect of fillers on the miscibility of polymer blends. The demonstrated good agreement with the experiment proves that this effect alone can explain the observed filler-induced change in the LCST.

show abstract

Section: Theory 21 the Condition Of The Spinodal Decomposition Of Fil...supporting

confidence: 68%

Spinodal Decomposition of Filled Polymer Blends: The Role of the Osmotic Effect of Fillers

Chervanyov

2023

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

“…The present work extends the method, previously developed [9,16,17] by the author, over the study of the relative roles of the filler affinity for copolymer blocks and the interaction between fillers in promoting the conductivity of a filled DBC system. Specifically, we focused on the study of the effect of the above two factors on the localization of fillers in the DBC-based composite that assumes cylindrical (hexagonal) morphology.…”

Section: Discussionmentioning

confidence: 73%

“…Following our previous work in [9,16,17], we describe the compositional structure of the DBC system by a singe order parameter η. η varies between two limiting values 1 and −1 that correspond to the pure polymer phases A and B, respectively. The thermodynamic state of this system is described by the grand potential Ω, which is written as a functional of η, and reduced external fields ϕ A,B = β(µ A,B − w A,B ).…”

Section: Immersion Energy Of a Filler In An Incompressible Dbc Systemmentioning

confidence: 99%

“…Following our previous work in [ 9 , 16 , 17 ], we describe the compositional structure of the DBC system by a singe order parameter

varies between two limiting values 1 and

that correspond to the pure polymer phases A and B , respectively.…”

Section: Theorymentioning

confidence: 99%

“…The possibility to control the preferential localization of fillers by changing the morphology of the host diblock copolymer system (DBC), well known from experiment [ 1 , 2 , 3 ] and theory [ 4 , 5 , 6 , 7 , 8 , 9 ], opens a wide perspective to the design of smart DBC-based composites. In contrast to chemically homogeneous polymer systems, the DBC can be used to “lock” fillers to their geometrically well-defined micro-phase domains, thus changing the properties of this system locally.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the Interplay between Polymer–Filler and Filler–Filler Interactions on the Conductivity of a Filled Diblock Copolymer System

Chervanyov

2023

Polymers

View full text Add to dashboard Cite

We investigate the relative roles of the involved interactions and micro-phase morphology in the formation of the conductive filler network in an insulating diblock copolymer (DBC) system. By incorporating the filler immersion energy obtained by means of the phase-field model of the DBC into the Monte Carlo simulation of the filler system, we determined the equilibrium distribution of fillers in the DBC that assumes the lamellar or cylindrical (hexagonal) morphology. Furthermore, we used the resistor network model to calculate the conductivity of the simulated filler system. The obtained results essentially depend on the complicated interplay of the following three factors: (i) Geometry of the DBC micro-phase, in which fillers are preferentially localized; (ii) difference between the affinities of fillers for dissimilar copolymer blocks; (iii) interaction between fillers. The localization of fillers in the cylindrical DBC micro-phase has been found to most effectively promote the conductivity of the composite. The effect of the repulsive and attractive interactions between fillers on the conductivity of the filled DBC has been studied in detail. It is quantitatively demonstrated that this effect has different significance in the cases when the fillers are preferentially localized in the majority and minority micro-phases of the cylindrical DBC morphology.

show abstract

Hybrid Time-Dependent Ginzburg–Landau Simulations of Block Copolymer Nanocomposites: Nanoparticle Anisotropy

et al. 2022

View full text Add to dashboard Cite

Block copolymer melts are perfect candidates to template the position of colloidal nanoparticles in the nanoscale, on top of their well-known suitability for lithography applications. This is due to their ability to self-assemble into periodic ordered structures, in which nanoparticles can segregate depending on the polymer–particle interactions, size and shape. The resulting coassembled structure can be highly ordered as a combination of both the polymeric and colloidal properties. The time-dependent Ginzburg–Landau model for the block copolymer was combined with Brownian dynamics for nanoparticles, resulting in an efficient mesoscopic model to study the complex behaviour of block copolymer nanocomposites. This review covers recent developments of the time-dependent Ginzburg–Landau/Brownian dynamics scheme. This includes efforts to parallelise the numerical scheme and applications of the model. The validity of the model is studied by comparing simulation and experimental results for isotropic nanoparticles. Extensions to simulate nonspherical and inhomogeneous nanoparticles are discussed and simulation results are discussed. The time-dependent Ginzburg–Landau/Brownian dynamics scheme is shown to be a flexible method which can account for the relatively large system sizes required to study block copolymer nanocomposite systems, while being easily extensible to simulate nonspherical nanoparticles.

show abstract

Conductivity of diblock copolymer system filled with conducting nano‐particles: Effect of copolymer morphology

Cited by 3 publications

References 57 publications

Spinodal Decomposition of Filled Polymer Blends: The Role of the Osmotic Effect of Fillers

Spinodal Decomposition of Filled Polymer Blends: The Role of the Osmotic Effect of Fillers

Effect of the Interplay between Polymer–Filler and Filler–Filler Interactions on the Conductivity of a Filled Diblock Copolymer System

Hybrid Time-Dependent Ginzburg–Landau Simulations of Block Copolymer Nanocomposites: Nanoparticle Anisotropy

Contact Info

Product

Resources

About