Kinetic structure of glass transition in polymer interfaces between filler and SBR matrix

Vieweg, S.; Unger, R.; Hempel, E; Donth, E.

doi:10.1016/s0022-3093(98)00658-9

Cited by 36 publications

(33 citation statements)

References 12 publications

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“…Assuming lamellar morphology this fi nding refl ects a 1-2 nm size of the overall distorted fraction. It is noteworthy that other groups in literature [62][63][64][65][66][67] using different experimental methods to determine the size of the interface layer surrounding nanofi llers in polymer matrices have reported values between 1-4 nm, which is fairly close to the fi ndings reported here. Although the build-up dependences are basically identical for all the prepared systems during initial stages of 1 H-1 H spin diffusion, considerable differences appear at later stages (marked with gray arrows in Figure 8 ).…”

Section: Nds [Wt%]supporting

confidence: 90%

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Roumeli

Brus

Policianova

et al. 2016

Macromol. Mater. Eng.

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The introduction of nanodiamond particles (NDs) in silane‐crosslinked polyethylene is found to lead to a notable and systematic deformation of the polymer unit cell. X‐ray diffraction evidence of the existence of a modified crystalline structure in the bulk of the polymer due to the presence of NDs is reported here for the first time. The covalent bonding between NDs and the surrounding macromolecular chains may support that the excessive local stress field ultimately distorts the polymer conformation, yielding a new distorted but still crystalline interface. Supporting data from solid‐state NMR experiments confirm the existence of a modified crystalline interface of about 1–2 nm in all the nanocomposite materials.

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Section: Nds [Wt%]supporting

confidence: 90%

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Roumeli

Brus

Policianova

et al. 2016

Macromol. Mater. Eng.

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“…An intuitive explanation is that shorter particle-particle distances immobilize large network mode lengths. This implies (via the fluctuation dissipation theorem 15 ) higher shear moduli of the matrix.…”

Section: Strain Sweepsmentioning

confidence: 97%

“…Since this is the transition zone of the rubber matrix, that is, the transition from the glassy to the rubbery zone, this behavior indicates that the reinforcing fillers affect molecular motions with mode lengths of order of several nanometers. 15 …”

Section: Frequency Sweepsmentioning

confidence: 99%

Comparison of dynamic shear properties of styrene-butadiene vulcanizates filled with carbon black or polymeric fillers

Vieweg¹,

Unger²,

Heinrich

et al. 1999

J. Appl. Polym. Sci.

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ABSTRACT:The dynamic shear behavior of SBR 1500 vulcanizates filled with polymeric fillers of 24.6, 40.2, and 74.7 nm diameter and various filler loading up to 100 phr (parts per 100 parts of rubber), and its dependence of strain amplitude up to 14%, have been investigated. The results are compared with carbon-black-filled vulcanizates. The reinforcement ability of polymeric fillers is comparable to that of carbon black, depending on filler particle diameter. As expected, the smaller particles have a higher reinforcement effect than larger particles. The Payne effect, that is, the decrease of storage shear modulus GЈ with increasing strain amplitude and the appearance of a loss modulus GЉ maximum at strains of a few percent, has also been observed in vulcanizates with polymeric fillers. The loss modulus maximum of vulcanizates filled with polymeric fillers is at higher strain amplitudes and is less pronounced than for carbon-black-filled vulcanizates. The results are discussed shortly in terms of recent models based on the idea of filler networking within the rubbery matrix. The experimental GЈ data are adjusted with the deagglomeration-reagglomeration Kraus model (1984).

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“…[29] For poly (dimethylsiloxane)/silica systems DD was about 1-2.5 nm using dielectric measurements, [30,31] %5 nm using neutron scattering, [32] and 0.8 nm using NMR. [33] For SBR/silica systems values of 1.5-1.9 nm [34,35] have been found using mechanical measurements.…”

Section: Fracture Behavior and Interfacial Thicknessmentioning

confidence: 99%

Indentation Fracture Mechanics for Toughness Assessment of PMMA/SiO₂ Nanocomposites

Lach

Kim

Michler

et al. 2006

Macro Materials & Eng

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Summary: Based on the results from agglomerate‐free PMMA nanocomposites with 10 and 20 wt.‐% spherical SiO2 nanoparticles, it has been shown that indentation fracture mechanics is a straightforward, powerful, cost‐effective and time‐effective tool for analyzing the fracture resistance of novel polymer materials, such as brittle nanostructured polymer‐ceramic hybrids. In contrast to pure PMMA, the R‐curve effect, i.e., the enhancement in crack resistance as a function of crack size, was not observed in the nanocomposites investigated. Fracture toughness was found to depend on the SiO2 nanoparticle content, and the maximum value was observed at 10 wt.‐%. A significant reduction in fracture toughness occurred at 20 wt.‐% SiO2 nanoparticles, which is associated with a percolation of the bound layers (interfacial layers) around the SiO2 particles. From DSC data, the thickness of the interfacial polymer layer was estimated to be about 9 nm.Hardness, elastic modulus and fracture toughness of PMMA/SiO2 composites as a function of nanoparticle fraction.magnified imageHardness, elastic modulus and fracture toughness of PMMA/SiO2 composites as a function of nanoparticle fraction.

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Kinetic structure of glass transition in polymer interfaces between filler and SBR matrix

Cited by 36 publications

References 12 publications

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Comparison of dynamic shear properties of styrene-butadiene vulcanizates filled with carbon black or polymeric fillers

Indentation Fracture Mechanics for Toughness Assessment of PMMA/SiO₂ Nanocomposites

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Kinetic structure of glass transition in polymer interfaces between filler and SBR matrix

Cited by 36 publications

References 12 publications

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Modified Crystalline Structure of Silane-Crosslinked Polyethylene in the Proximity of Nanodiamonds

Comparison of dynamic shear properties of styrene-butadiene vulcanizates filled with carbon black or polymeric fillers

Indentation Fracture Mechanics for Toughness Assessment of PMMA/SiO2 Nanocomposites

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Indentation Fracture Mechanics for Toughness Assessment of PMMA/SiO₂ Nanocomposites