Oil absorption test

Typically, if oil absorption is low, the filler does not change the hot melt viscosity much. Because of this, oil absorption test is often used to characterize the effect of fillers on rheological properties of filled plastics. 

Oil absorption tests made using the oil absorption test described in the text. All values are an average of five (5) replicate determinations. 

The main product was Hltered ofT, after adding 0.2% cetyltrimethylammonium bromide based on SiO, to improve flocculation, then washed with acetone and drid at ordinary temperature. This powder was light and soft with a surface area of 335 m g , had a linseed oil absorption of 476 ml per 100 grams, a bulk density of 0.12 g cm, and was readily dispersible in oil. From the oil absorption test it can be concluded that the specific pore volume is at least 2 cm g and in that respect exceeds some commercial aerogels. 

Testing of phthalocyanines includes crystallization (qv), flocculation, and appHcation in paints, plastics (qv), and printing inks (1). The ASTM standard specifications include CuPc in dry powder form for various appHcations (153). The specifications cover color (qv), character or tint, oil absorption, reactions in identification tests, and dispersions and storage stabiUty. Quantitative deterrninations are possible with ceric sulfate (30) or sodium vanadate (154). Identification methods are given (155), including tests for different appHcations. 

Several properties of the filler are important to the compounder (279). Properties that are frequentiy reported by fumed sihca manufacturers include the acidity of the filler, nitrogen adsorption, oil absorption, and particle size distribution (280,281). The adsorption techniques provide a measure of the surface area of the filler, whereas oil absorption is an indication of the stmcture of the filler (282). Measurement of the sdanol concentration is critical, and some techniques that are commonly used in the industry to estimate this parameter are the methyl red absorption and methanol wettabihty (273,274,277) tests. Other techniques include various spectroscopies, such as diffuse reflectance infrared spectroscopy (drift), inverse gas chromatography (igc), photoacoustic ir, nmr, Raman, and surface forces apparatus (277,283—290). 

Testing. Various test methods are provided by ASTM (16). These iaclude pigment tests of importance such as chemical analysis, presence of oversize particles, oil absorption, particle size distribution, degree of dispersion, presence of soluble components, etc. Numerous tests are also given by ASTM for the properties of filled and unfilled polymers. These iaclude, for example, such properties as impact resistance, stiffness, viscosity, tear resistance, hardness, color, and electrical resistivity. 

Functional property tests were conducted in duplicate. AACC (21) methods were used for the determination of water hydration capacity (Method 88-04) and nitrogen solubility index (NSI) (Method 46-23). Oil absorption capacity was measured by the procedures of Lin et al. (22) and oil emulsification by a modification (22) of the Inklaar and Fortuin (23) method. Pasting characteristics of 12.0% (w/v, db) slurries of the flours and processed products were determined on a Brabender Visco/Amylograph (Method 22-10). The slurries were heated from 30 to 95°C before cooling to 50°C to obtain the cold paste viscosity value. Gelation experiments were conducted by heating 15% (w/v db) slurries in sealed stainless steel containers to 90°C for 45 min in a water bath C3). 

DIN 53199 Bestimmung der Olzahl (Spatelverfahren). ISO 787 T5 General methods of testing for pigments and extenders, Part 5 Determination of oil absorption value. 

Bouchon, P. and Pyle, D. L. (2005a). Modelling oil absorption during post-frying cooling. II Solution of the mathematical model, model testing and simulations. Trans. Inst. Chem. Eng. C Food Bioproducts Process. 83, 253-260. 

There arc several conventional tests required hy consumers of ground mica. They include screening and Ihe determination of bulk density, true specific gravity, chemical analysis, moisture, free silica, refraction index, oil absorption, brightness, grit content, and aspect ratio. 

The USP XX (30) and the Official Methods of Analysis of the Association of Official Analytical Chemists (AOAC) (44) describe in detail the curative method more commonly known as the rat line method. This method is not applicable to products offered for poultry feeding. For poultry feeds, and fish liver oils and their extracts, the AOAC (44) also describes in detail the chick bone ash method. In addition to the above two methods, there is a method based on the comparative measurement of serum calcium in rats referred to as Intestinal Calcium Transport Assay and another method based on the comparative amounts of calcium absorbed by control and test chicken referred to as Calcium Absorption Test. These methods are described by DeLuca and Blunt (45). 

Owing to the high free volume, silicone rubber absorbs oil-soluble organic dyes easily, and the oil-soluble dye absorption test is an effective indicator of the uniformity and the barrier characteristics of the coating. When a droplet of... 

A number of sorbents have been proposed to clean water surfaces from oil [318]. The use of hydrophobic aerosil was proposed for this purpose, which, however, can hardly be accomplished for economic reasons. More promising seems to be the proposal to use natural materials for oil absorption, such as turf, diatomite, vermiculite, swelled perlite. A method has been proposed for the modification of perlite by a consequent treatment with cationic surfactants and higher carboxylic acid salts. Such modification of swelled perlite increases its oil capacity up to 600%, the water absorption decreases 10 -100-fold, and the sinkability decreases considerably. The degree of oil removal from the water surface is, according to in vitro tests data, 98 - 99%. Methods have been found to use oil-saturated sorbents. 

Polypropylene and polyamides have much more rigid particle size and shape requirements than thermosets. Specifically, the need is for a small particle size, with a low aspect ratio and minimal surface area. The particle size distribution should also allow for good packing, as indicated by a relatively low level of oil absorption in tests. Achieving such desired particle morphology has been the main aim of supplier process development since the 1980s. 

Standard test method for carbon black-oil absorption number of compressed sample (COAN), ASTM Standard ASTM D3493-13, ASTM International, West Conshohocken, PA, 2013. 

The oil absorption capacity of these fibrous test samples was determined by measuring the mass of the oil-soaked specimens. In each determination, the oil-soaked specimens were carefully removed from the oil beaker using forceps. After removal, ten seconds was allowed for the samples to drip off excess oil before the weighing was made. The absorption capacity was finally calculated by dividing the mass of the oil absorbed by the mass of fiber ... 

Oil absorption. This is also used to characterize pigment blacks. Carbon black is ground into linseed oil and the oil absorption is the maximum amount of oil permitting a non-deliquescent cone to be formed from the mixture. This test gives information more relevant to production of paints. 

ASTM D281-95, Standard Test Method for Oil Absorption of Pigments by Spatula Rub-out, 2002. 

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