Confined Polymer Dynamics on Clay Platelets

Frielinghaus, Xiuli; Brodeck, Martin; Holderer, Olaf; Frielinghaus, Henrich

doi:10.1021/la102667k

Cited by 20 publications

(25 citation statements)

References 29 publications

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“…Figure 42Intermediate scattering function versus the product of time and the cube of the scattering vector for two concentrations of PEO/clay solutions in heavy water. The superposition of the curves for different Q is consistent with Zimm scaling (Equation19) (from the study by Frielinghaus et al(118) with permission).…”

supporting

confidence: 68%

“…It is a testament to the (117) with permission). 19) (from the study by Frielinghaus et al (118) with permission).…”

Section: Discussionmentioning

confidence: 99%

“…The motion of polyethylene oxide chains adsorbed on clay was monitored using NSE. (118) The data (Figure 42) (107) with permission). conform to Zimm scaling, according to which the relaxation time varies as (119) τ ∝ Q −3 η/T (19) where η is the viscosity.…”

Section: Polymer Dynamicsmentioning

confidence: 99%

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Neutron Scattering in the Analysis of PolymersUpdate based on the original article by D. G. Bucknall,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Roland

2012

Encyclopedia of Analytical Chemistry

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The focus of this article is the application of neutron scattering in polymer science, with various examples given to illustrate the types of problems addressed. Neutron scattering is a powerful analytical tool for investigating polymers. Unique aspects such as the capacity to measure thick samples with an absence heating or radiation-induced damage, selective control of the scattering contrast by isotopic substitution, and the measurement of dynamic properties as a function of length scale are among the many attributes that make neutron methods not just complementary to other analytical techniques, but in many cases the only means to address material issues. The information that can be obtained from neutron scatteringthe size, form, and orientation of molecular chains, Update based on the original article by D. G. Bucknall, Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.the thermodynamics and phase structure of mixtures, interfaces and interfacial phenomena, the dynamics at both the local and global length scales, details of the structure of complex nanocomposites and biological materials, etc.has only been surveyed herein. It is a testament to the utility of neutron scattering that even though the application of neutrons to polymers did not begin in earnest until the 1990s, through the past decade, about 325 peer-reviewed publications per year have appeared on the topic. Whether this figure changes in the future will likely depend on the availability of the specialized, costly facilities required for neutron experiments. Certainly there is no expectation of abatement in the number of important problems in polymer science that can be addressed using neutron methods.

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confidence: 68%

“…It is a testament to the (117) with permission). 19) (from the study by Frielinghaus et al (118) with permission).…”

Section: Discussionmentioning

confidence: 99%

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Neutron Scattering in the Analysis of PolymersUpdate based on the original article by D. G. Bucknall,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Roland

2012

Encyclopedia of Analytical Chemistry

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“…This situation was recently investigated by Frielinghaus et al 52 with NSE experiments on solutions of 6% (exfoliated) laponite clay and either 4% or 8% PEO in deuterated water. The intermediate scattering functions showed plateaus at long times that are absent in free-polymer solutions.…”

Section: Confinement In Polymer Systemsmentioning

confidence: 99%

“…Confinement is in fact the focus and common denominator of a variety of recent works. Confined polymer dynamics at different levels have been characterized by QENS in systems with different confining agents, for example, polymers infiltrated in nano-pores (one-dimensional, 1D), [46][47][48][49][50] intercalated in layered structures (2D), 51 adsorbed on clays, 52 surrounded by the vitrified component in a thermodynamically miscible polymer blend, 45 or confined by the neighboring microphase in a diblock copolymer. 53 Finally, hydrated polymers and polymer solutions-in particular, microgels-have also recently been investigated by QENS.…”

Section: Recent Progress On Polymer Dynamics By Neutron Scatteringmentioning

confidence: 99%

Recent progress on polymer dynamics by neutron scattering: From simple polymers to complex materials

Colmenero

Arbe

2012

J Polym Sci B Polym Phys

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ABSTRACT:The recent (from 2010 onward) contributions of quasielastic neutron scattering techniques (time of flight, backscattering, and neutron spin echo) to the characterization and understanding of dynamical processes in soft materials based on polymers are analyzed. The selectivity provided by the combination of neutron scattering and isotopic-in particular, proton/deuterium-labeling allows the isolated study of chosen molecular groups and/or components in a system. This opportunity, together with the capability of neutrons to provide space/time resolution at the relevant length scales in soft matter, allows unraveling the nature of the large variety of molecular motions taking place in materials of increasing complexity. As a result, recent relevant works can be found dealing with dynamical process which associated characteristic lengths and nature are as diverse as, for example, phenyl motions in a glassy linear homopolymer like polystyrene and the chain dynamics of a polymer adsorbed on dispersed clay platelets. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 51: 2013 KEYWORDS: molecular dynamics; neutron scattering; relaxation POLYMER DYNAMICS AT DIFFERENT LENGTH AND TIME SCALES: FROM SIMPLE POLYMERS TO COMPLEX MATERIALSPolymers are composed of macromolecules which are built up by a large number N of monomer units linked together by covalent bonds. Because of this macromolecular nature, the structural and dynamic properties of polymeric systems strongly depend on a hierarchy of length and time scales. From a structural point of view, the random coil shape of linear polymer chains in the melt and glassy state-proposed by Flory in the 50s 1 -is nowadays well established by small angle neutron diffraction (SANS). At smaller length scales than those characteristic for the chain dimensions, the local arrangements of the atoms give rise to broad maxima in the static structure factor S(Q) also accessible by neutron diffraction. Usually, a first main peak centered at Q-values ≈ 1 . . . 1.5 Å −1 is present. The T-dependence of this maximum, following the expansion coefficient, indicates an interchain origin, that is, it mainly relates to correlations between atoms belonging to different chains (or to the same chain but well separated segments).2 A second peak located at ∼3 Å −1can also be usually found in S(Q). The small value of the associated characteristic length and its weak T-dependence indicate the intrachain nature of the correlations giving rise to this maximum. We also note that the broadening of the Bragg peaks found in polymers reveals a clear amorphous character. In fact, the features shown in S(Q) in polymeric systems are universal for amorphous materials, not only for polymers, and in particular for glass forming systems. Thus, a universal behavior common for all glass forming materials can also be expected in the dynamics, including the observation of the glass transition phenomenon. 3As anticipated, the complexity of amorphous polymers shows up not only in the structural propertie...

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A grazing incidence neutron spin echo study of near surface dynamics in p(MEO2MA-co-OEGMA) copolymer brushes

et al. 2018

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Confined Polymer Dynamics on Clay Platelets

Cited by 20 publications

References 29 publications

Neutron Scattering in the Analysis of PolymersUpdate based on the original article by D. G. Bucknall,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Neutron Scattering in the Analysis of PolymersUpdate based on the original article by D. G. Bucknall,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Recent progress on polymer dynamics by neutron scattering: From simple polymers to complex materials

A grazing incidence neutron spin echo study of near surface dynamics in p(MEO2MA-co-OEGMA) copolymer brushes

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