SAXS Studies on Agglomerative Silica Suspension under Shear

Li, L.; Kuwamoto, S.; Fujimura, Emi; Yokoyama, K.; Urushihara, Yoshimasa; Matsui, Junichi; Co, Albert; Leal, Gary L.; Colby, Ralph H.; Giacomin, A. Jeffrey

doi:10.1063/1.2964844

Cited by 8 publications

(8 citation statements)

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“…The wavelength of X-ray was 0.100 nm, and the sample-to-detector distance was 1.3 m. The SAXS measurements were also conducted at BL08B2 in SPring-8 with an exposure time of 10 s by using PILATUS 100 K (DECTRIS Ltd., Baden, Switzerland). The wavelength of X-ray was 0.100 nm, and the sample-to-detector distance was 1.5 m. Refer to the publication in detail for BL40B2 and for BL08B2. , …”

Section: Methodsmentioning

confidence: 99%

Strain-Induced Deformation of Glassy Spherical Microdomains in Elastomeric Triblock Copolymer Films: Simultaneous Measurements of a Stress–Strain Curve with 2d-SAXS Patterns

Tomita

Urushihara

et al. 2017

Macromolecules

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Thermoplastic elastomers are elastomeric materials which contain hard domains as physical cross-linking for rubbery chains. Therefore, the hard domains are required permanently rigid. Nevertheless, we have found experimentally deformation of the hard domains upon uniaxial stretching of the thermoplastic elastomer films. In this paper, we report experimental results of deformation of glassy spherical microdomains in elastomeric triblock copolymer films upon uniaxial stretching, as revealed by two-dimensional small-angle X-ray scattering (2d-SAXS) measurements. Actually, shifts of the peak position of the particle scattering toward lower and higher q-regions were detected for q directions parallel and perpendicular to the stretching direction (SD), respectively, where q stands for the scattering vector. By assuming that spheres simply deformed into prolate spheroids with its major axis parallel to SD, 1d-SAXS profiles measured at several strains were successfully reproduced with model calculation of the 1d-SAXS profile. From the results of model calculation, radii of the prolate spheroids were appropriately determined. Since the extent of the deformation of microdomains was found to increase as the initial size of microdomains decreased, it is concluded that the deformation of glassy microdomains may be due to a high extent of the stress concentration at microdomains. Upon unloading, the deformed particle scattering peak in the 2d-SAXS pattern was found to retrieve almost a round shape. At a glance, this fact implies that the deformed sphere (prolate spheroid) recovers an isotropic shape. However, this kind of the elastic behavior cannot be the case for the glassy domain. Alternatively, we have tried to explain the change of the 2d-SAXS pattern by orientational relaxation of the prolate spheroids without changing the shape of the prolate spheroids. It was found that such trial was sound.

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Section: Methodsmentioning

confidence: 99%

Strain-Induced Deformation of Glassy Spherical Microdomains in Elastomeric Triblock Copolymer Films: Simultaneous Measurements of a Stress–Strain Curve with 2d-SAXS Patterns

Tomita

Urushihara

et al. 2017

Macromolecules

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“…To confirm this hypothesis, it will be necessary to determine the size of alumina nanoparticle clusters in suspension to see if the size decreases with the addition of saccharides and the application of shear. Small angle X-ray Scattering (SAXS) may be useful for elucidation of the cluster size as well [29] and [30].…”

Section: Instantaneous Breakupmentioning

confidence: 99%

Shear thinning behavior of aqueous alumina nanoparticle suspensions with saccharides

Ament

Kessler

Akinç

2014

Ceramics International

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“…This is expected, since the optimum measurement time increases as the shear rate becomes closer to zero. 28 The "25 s" and "400 s" runs show significant difference in viscosity for comparable shear rates. On the other hand, the 200 s and 400 s data are very reproducible.…”

Section: Aqueous Suspensionsmentioning

confidence: 95%

“…Small angle x-ray Scattering (SAXS) may be a useful technique to study this based on previous studies. 28,29,30 It would also be useful to study different saccharides to see if the floc breakup correlates to the type of sugar. Acoustophoretic zeta potential measurements also may be useful to study the particle interactions.…”

Section: Modelmentioning

confidence: 99%

“…Thermogravimetric analysis (TGA) experiments under the same isothermal conditions were also performed as a concomitant measurement of the volatile content. 28 The isothermal TGA results are shown in Table 2. The BECy has just 0.7% volatile content (as defined by the ASTM standard isotherm for 30 min) while the butyl glycidyl ether (BGE) diluted epoxies had a volatile content of 24.8%.…”

Section: Mass Loss Due To Vocs By Astm and Tgamentioning

confidence: 99%

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Viscosity of aqueous and cyanate ester suspensions containing alumina nanoparticles

Lawler

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for their support and guidance given throughout my research work. I greatly appreciate all that they have done. Thanks also to my committee Klaus Schmidt-Rohr for help with NMR analysis. Special thanks also to Wilber Lio, Xia Sheng, Yusuf Yusufoglu, and Tim Mauldin for being there to answer my questions as well as Lisa Nielsen and Lars Ellingson for their time spent in the lab working with me for their Freshman Honors projects. Last, but certainly not least, thanks to my parents and Craig Ament, my fiancé, for their great support.

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SAXS Studies on Agglomerative Silica Suspension under Shear

Cited by 8 publications

References 0 publications

Strain-Induced Deformation of Glassy Spherical Microdomains in Elastomeric Triblock Copolymer Films: Simultaneous Measurements of a Stress–Strain Curve with 2d-SAXS Patterns

Strain-Induced Deformation of Glassy Spherical Microdomains in Elastomeric Triblock Copolymer Films: Simultaneous Measurements of a Stress–Strain Curve with 2d-SAXS Patterns

Shear thinning behavior of aqueous alumina nanoparticle suspensions with saccharides

Viscosity of aqueous and cyanate ester suspensions containing alumina nanoparticles

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