Solid particles in an elastomer matrix: impact of colloid dispersion and polymer mobility modification on the mechanical properties

Papon, Aurélie; Montès, H.; Lequeux, François; Oberdisse, Julian; Saalwächter, Kay; Gallais, Laurent

doi:10.1039/c2sm06885k

Cited by 107 publications

(109 citation statements)

References 22 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 The unique reinforcement has been explained theoretically 2,3 as well as experimentally [4][5][6] by filler networking, where filler-filler contacts are mediated by adsorbed and thus immobilized polymer species. The characterization of such adsorbed layers is challenging, as the traditional solvent-leaching technique ("bound rubber determination") largely overestimates the amount of polymer being part of the actual reduced-mobility layer.…”

Section: Introductionmentioning

confidence: 99%

“…Bare oxide fillers such as silica and alumina, displaying surface hydroxy groups, interact favorably with polymers capable of acting as hydrogen-bond acceptor, such as poly(dimethyl siloxane), PDMS, [8][9][10] poly(ethylene oxide), PEO, [11][12][13][14][15] poly(2-vinyl pyridine), P2VP, 16,17 or different acrylate polymers. 5,[18][19][20][21][22] The amount of dynamically modified polymer, and with this the nominal thickness of an assumed-to-be contiguous reduced-mobility layer, can be estimated on the basis of results from different techniques. Such results are often not compatible with each other even for virtually the same polymer-surface a) Electronic address: kay.saalwaechter@physik.uni-halle.de.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reduced-mobility layers with high internal mobility in poly(ethylene oxide)–silica nanocomposites

Golitsyn

Schneider

Saalwächter

2017

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

A series of poly(ethylene oxide) nanocomposites with spherical silica was studied by proton NMR spectroscopy, identifying and characterizing reduced-mobility components arising from either roomtemperature lateral adsorption or possibly end-group mediated high-temperature bonding to the silica surface. The study complements earlier neutron-scattering results for some of the samples. The estimated thickness of a layer characterized by significant internal mobility resembling backbone rotation ranges from 2 nm for longer (20 k) chains adsorbed on 42 nm diameter particles to 0.5 nm and below for shorter (2 k) chains on 13 nm particles. In the latter case, even lower adsorbed amounts are found when hydroxy endgroups are replaced by methyl endgroups. Both heating and water addition do not lead to significant changes of the observables, in contrast to other systems such as acrylate polymers adsorbed to silica, where temperature-and solvent-induced softening associated with a glass transition temperature gradient was evidenced. We highlight the actual agreement and complementarity of NMR and neutron scattering results, with the earlier ambiguities mainly arising from different sensitivities to the component fractions and the details of their mobility.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduced-mobility layers with high internal mobility in poly(ethylene oxide)–silica nanocomposites

Golitsyn

Schneider

Saalwächter

2017

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…These adsorbed chains form an dynamic interfacial layer (DIL), which has distinct segmental mobility and other properties [7,[14][15][16][17][18][19][20][21][22][23], and is believed to directly correlate with many advanced macroscopic properties of PNCs [3,5]. However, despite the recent intensive discussions on the features of the DIL [18,19,[22][23][24][25][26][27][28], many of its characteristics, especially the basic relationship between the interfacial layer chain packing and the dynamics, are still missing. This strongly hinders our understanding of various phenomena in PNCs.…”

mentioning

confidence: 99%

Unexpected Molecular Weight Effect in Polymer Nanocomposites

et al. 2016

View full text Add to dashboard Cite

“…Various recent studies have also shown that the polymer dynamics is modified when approaching the surface of nanocomposite. Papon et al 34 characterized the silica dispersion by SANS in combination with reverse Monte Carlo modeling, and the mobility modification of the polymer by low-field proton NMR spectroscopy in a silicafilled model elastomer. The authors quantified the amount of interparticle connections and correlated it with the magnitude of the Payne effect taken from shear rheology.…”

Section: Introductionmentioning

confidence: 99%

Molecular-dynamics simulations of thin polyisoprene films confined between amorphous silica substrates

Guseva

Комаров

Lyulin

2014

The Journal of Chemical Physics

View full text Add to dashboard Cite

Constant temperature–constant pressure (NpT) molecular-dynamics computer simulations have been carried out for the united-atom model of a non-crosslinked (1,4) cis-polyisoprene (PI) melt confined between two amorphous, fully coordinated silica surfaces. The Lennard-Jones 12-6 potential was implemented to describe the polymer–silica interactions. The thickness H of the produced PI–silica film has been varied in a wide range, 1 < H/Rg < 8, where Rg is the individual PI chain radius of gyration measured under the imposed confinement. After a thorough equilibration, the PI film stratified structure and polymer segmental dynamics have been studied. The chain structure in the middle of the films resembles that in a corresponding bulk, but the polymer-density profile shows a pronounced ordering of the polymer segments in the vicinity of silica surfaces; this ordering disappears toward the film middles. Tremendous slowing down of the polymer segmental dynamics has been observed in the film surface layers, with the segmental relaxation more than 150 times slower as compared to that in a PI bulk. This effect increases with decreasing the polymer-film thickness. The segmental relaxation in the PI film middles shows additional relaxation process which is absent in a PI bulk. Even though there are fast relaxation processes in the film middle, its overall relaxation is slower as compared to that in a bulk sample. The interpretation of the results in terms of polymer glassy bridges has been discussed.

show abstract

Solid particles in an elastomer matrix: impact of colloid dispersion and polymer mobility modification on the mechanical properties

Cited by 107 publications

References 22 publications

Reduced-mobility layers with high internal mobility in poly(ethylene oxide)–silica nanocomposites

Reduced-mobility layers with high internal mobility in poly(ethylene oxide)–silica nanocomposites

Unexpected Molecular Weight Effect in Polymer Nanocomposites

Molecular-dynamics simulations of thin polyisoprene films confined between amorphous silica substrates

Contact Info

Product

Resources

About