Cab-O-Sil fumed silica

Periodic mesoporous vanadium modified silicates (V-MCM-41 and V-HMS) were synthesized, characterized and tested in our laboratory [93,141,172-174], V-MCM-41 samples were prepared hydrotheimally at 373 K using Cab-O-Sil fumed silica, vanadyl sulfate and dodecyltrimethylammonium bromide [172]. The preparation of V-HMS was carried out at room temperature in the presence of dodecylamine as template [173,174]. 

Cabot Corporation. Technical literature Cab-O-Sil fumed silicas, the performance additives, 1995. 

Preparation of the Cab-O-Sil fumed silica, a multistepped procedure, was as follows. The fumed silica powder (25-125 mg) was weighed into a 10-mL vial and then suspended in 5 mL of a 0.0016 M NaOH solution. After an initial 10-s vortex... 

Cab-O-Sil Fumed Silica. Considerable work was done on the three fumed silica samples (Table II) by using both sedimentation FFF and flow FFF. Figures 11 and 12 demonstrate the effectiveness of both FFF systems in the fractionation of these chainlike particles. For both sedimentation and flow FFF, the L-90 sample was injected and fractions were... 

FIGURE 34.7 Si CP-MAS spectra of (a) Cab-O-Sil fumed silica and (b) silica gel. Top experimental spectra. Bottom individual Q2, Q3 and Q4 peaks by deconvolution. Middle computer sum of the contributions shown at the bottom. Taken from reference 5r. With permission. 

FIGURE 34.10 360 MHz CRAMPS spectra of Cab-O-Sil fumed silica as a function of hydration/dehydration state (weight loss due to drying shown in parentheses). Sharp peak at 0.05 ppm due to a PDMS reference. Taken from reference 5q. With permission. 

FIGURE 34.18 H-decoupled (top spectrum of each set) and H-coupled (bottom spectrum of each set) CP-MAS spectra of untreated Cab-O-Sil fumed silica at three different MAS speeds, as indicated. Computer-simulated spectrum and individual deconvoluted contributions are shown below each experimental spectrum. Taken from refrecne 5r. With permission. 

FIGURE 34.21 CP-MAS spectra of Cab—O—Sil fumed silica obtained with four different dipolar-dephasing times (as... 

Preparation of the Cab-O-Sil fumed silica, a multi-stepped procedure, was as follows. The fumed silica powder (25-125 mg) was weighed into a 10-mL vial and then suspended in 5 ml. of a 0.0016 M NaOH solution. After an initial 10-s vortex stage, the sample vial and a sonic probe were both immersed in a small water bath. Sonication was carried out for 5 min at 200 W. (The recommended procedure called for 2-min sonication at 480 W with a microtip inserted directly into the sample solution. This procedure was modified because we did not have a microtip.) Immediately before each injection the sample was vortexed for 10 s. 

Cab-O-Sil Fumed Silica in Adhesives and Sealants. Cahot Corp. Publication Jun. 1990. McNeilly K, lost EM, Sexton P. Effect of Lubricant Solvent System on Rheological Properties of Silver-Filled Polymers. ISHMProc. Sthintl. Microelectronics Conf. 1994 308-317. Korkin A, Gusev E, Labonowski JK, Luryi S, eds. Nanotechnology for Electronic Materials and Devices. Springer 2007. 

Another example of the effect of fillers on improving bond strength is reported for a silicone RTV-1 sealant formulated with Cabot Corporation s Cab-O-Sil LM-130 and TS-720 materials. Cab-O-Sil fumed silicas are very effective reinforcing agents due to the very-large surface area available forpolymer/filler interactions. The very low, 45 psi, tensile strength of the unfilled silicone increased to 210 psi with 14 phr of LM-130 fumed silica and to 150 psi with the same level of TS-720 fumed silica,... 

Cab-O-Sil Fumed Silica in Adhesives and Sealants, Cabot Corp. Publication, (Jun. 1990)... 

Chemical Name Amorphous siUcon dioxide Trade Name CAB-O-SIL Fumed Silica... 

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