Morphology and structure of silica agglomerates in silica‐reinforced silicone rubber

Galanti, A. V.; Sperling, L. H.

doi:10.1002/app.1970.070141112

Cited by 26 publications

(8 citation statements)

References 15 publications

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“…From electron microscopy studies it is known that the filler aggregates (about 5 pm) can form agglomerates of about 20 pm in diameter [25]. The samples were based on linear (non-crosslinked) PDMS (qsp = 450.000) and Aerosil A300 (specific surface = 286 m2/g), mixed by milling.…”

Section: Samplesmentioning

confidence: 99%

Investigation of stress distributions in filled polysiloxane by NMR imaging

Blümler

Blümich

1993

Acta Polymerica

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NMR imaging is applied to industrial poly(dimethy1siloxane). Samples were investigated in the strained and unstrained state with and without a cut, and compared with two model compounds. Inhomogeneous filler distributions cause variations in the magnetic susceptibility and lead to contrast in gradient-echo images. T,-parameter images revealed distributions in segmental mobility associated with the filler inhomogeneities as well as with the cut.The images were recalibrated to give strain and stress images by use of integral stress and T, values determined for macroscopic uniaxial strain. The effects of filler inhomogeneities appear larger in the NMR images than in polarization micrographs because of magnification by magnetic field distortions from susceptibility differences in gradient-echo images, and because changes in segmental mobility of surrounding polymer chains are detected rather than the filler itself.The methods can also be applied to 3D imaging of nontransparent rubbers.

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Section: Samplesmentioning

confidence: 99%

Investigation of stress distributions in filled polysiloxane by NMR imaging

Blümler

Blümich

1993

Acta Polymerica

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“…Silicone rubber has been widely applied in many industrial products because of its excellent properties, such as high flexibility, heat resistance, electrical insulation, water resistance, and weather resistance. Silica particles are filled into silicone rubber to improve its mechanical properties, especially the strength and elastic modulus (Yatsuyanagi et al, 2001;Salvi et al, 2002;Gauthier et al, 2004;Patwardhan et al, 2006;Galanti and Sperling, 1970;Vondráček and Schätz, 1979;Zhang et al, 2011;Yan et al, 2015). In this study, we examined the linear elastic behavior of silicone rubbers filled with micro-and nano-silica particles on the basis of experimental results and theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

Linear elastic properties of silicone rubbers filled with nano- and micro-silica particles

Adachi

Noda

Ishii

2020

Mechanical Engineering Journal

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Linear elastic properties of the rubber composites filled with nano-and micro-particles were discussed on the basis of the experimental results for the silicone rubbers filled with the silica particles and theoretical analysis. Because the nano-particles behaved in the composite as apparent particles composed of the nano-particles and interphase layers formed on the particles, it was validated that Lewis and Nielsen's mixture law with the apparent volume fraction could evaluated Young's modulus of the rubber composite in linear elastic region of the measured tensile stress-strain relations. The proportional limit strain of the composite was formulated theoretically using the model in which the particles were distributed three-dimensionally and randomly. The analyzed limit strain was clarified to be valid by comparing with the measured results of the composites filled with the nano-and micro-particles when the (apparent) volume fraction of the particles was less than the threshold of the particle percolation, 0.3. Finally, stress-strain relations in the linear elastic region were shown specifically by using the analytical Young's moduli and proportional limit strains for the composites.

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“…Silica particles are used to fill silicone rubber to improve its mechanical properties, especially strength, and elastic modulus. The mechanical properties of silicone rubbers filled with silica particles have been investigated . However, the effect of the filling silicone rubbers with nanosilica particles on deformation properties has not been clarified.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical properties of silicone rubbers filled with silica particles have been investigated. [34][35][36][37][38][39][40] However, the effect of the filling silicone rubbers with nanosilica particles on deformation properties has not been clarified.…”

Section: Introductionmentioning

confidence: 99%

Interphase‐layer effect on deformation of silicone rubber filled with nanosilica particles

Adachi¹,

Yamada²,

Ishii

2017

J of Applied Polymer Sci

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The viscoelastic and statically tensile deformation properties of silicone rubber composites filled with nanosilica (300 nm in diameter) and microsilica particles (1.5 μm in diameter) were investigated on the basis of experimental results to clarify the interphase‐layer effect on these properties. The interphase layers formed around the nanoparticles without chemical coating were found to be glassy, even though the composites were in the rubbery state. The interphase layer thickness was determined to be approximately 20 nm using Guth and Gold's mixture law with the viscoelastic properties of the nanoparticle‐filled rubber in the rubbery state. The determined thickness of the interphase layer was confirmed by comparing the maximum strains at fracture for the nanoparticle‐filled rubber, which decreased for higher volume fraction of the nanoparticles. Therefore, the deformation properties were clarified to depend on the volume fraction of the apparent particles composed of the nanoparticles and interphase layers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45880.

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Morphology and structure of silica agglomerates in silica‐reinforced silicone rubber

Cited by 26 publications

References 15 publications

Investigation of stress distributions in filled polysiloxane by NMR imaging

Investigation of stress distributions in filled polysiloxane by NMR imaging

Linear elastic properties of silicone rubbers filled with nano- and micro-silica particles

Interphase‐layer effect on deformation of silicone rubber filled with nanosilica particles

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