DOP = dioctylphthalate

DOP (Dioctylphthalate) Generated particles of this chemical are used in filter efficiency tests. 

TBEP, tri(butoxyechyl)phosphate DC18C6, [Pg.112]

Figure 8.1 Separation of PVC from other plastics using the solvent technique. DOP dioctylphthalate...

DOP, dioctylphthalate IPPD, A -isopropyl-W-phenyl-p-phenylene diamine NBR, acrylonitrile-butadiene rubber NR, natural rubber PA, polyamide PAAE, polyamide amine epichlorohydrin PBDD, polybrominated dibenzo-p-dioxins PBDF, polybrominated dibenzofu-rans PBT, polybutylene terephthalate PDBS, polydibromostyrene. 

Cold-generated DOP A cold-generated aerosol dioctylphthalate (DOP) test, used to measure the efficiencies of high-efficiency filters. A hot DOP test may also be used. 

Rigid PVC has been available commercially for over half a century, but the unstabilized polymer could not be molded or extruded until plasticizers were incorporated into it in the 1930s. The solubility parameters of commercial PVC plasticizers such as dioctylphthalate (DOP) are similar to those of PVC... 

DOP polydisperse aerosol is generated by blowing air through liquid dioctylphthalate (DOP) at room temperature. The approximate light scattering mean droplet size distribution of the aerosol is 99% + less than 3.0 pm and 95% + less than 1.5 pm. 

Plastisol of type II (of strong thyxotropy) PVC resin (Solwic), 54% plasticizer (dioctylphthalate, DOP), 43% stabilizer (DOPTC), 3%. 

Filters used for the prefiltration and final filtration should be maintained to operate to their design specifications. Deterioration of filters is caused by leakage and/or accumulation of particles. The former is tested by periodical integrity test (usually dioctylphthalate DOP test), and the latter is tested by the increase of air pressure differentials between the upstream and downstream sides of the fdter. 

Efficiency testing of HEPA filters used for the supply of sterile air to aseptic workplaces (Chapter 21) is normally achieved by the generation upstream of dioctylphthalate (DOP) or sodium chloride particles of known dimension followed by detection in downstream filtered air. Retention efficiency is recorded as the percentage of particles removed under defined test conditions. Microbiological tests are not normally performed. 

Integrity test all HEPA filters with dioctylphthalate (DOP) smoke (0.3 ft). 

The method is also applicable to soil, provided that a suitable procedure for the extraction of phthalates from soil can be derived. The scope of ISO 18856 contains the following phthalates dimethylphthalate (DMP), diethylphthalate (DEP), dipropylphthalate (DPP), di-(2-methyl-propyl)phthalate (DiBP), dibutyl-phthalate (DBP), butylbenzylphthalate (BBzP), dicyclohexylphthalate (DCHP), di-(2-ethylhexyl)phthalate (DEHP), dioctylphthalate (DOP), didecylphthalate (DDcP) and diundecylphthalate (DUP) a further 38 phthalates are mentioned in an annex. 

Phthalates are the most frequently used esters. Dibutylphthalate (DBP) tends to give soft compounds with tack dioctylphthalate (DOP) is less volatile and tends to produce harder compounds because of its higher molecular weight. Polymeric esters such as polypropylene adipate (PPA) are used when low volatility is required along with good heat resistance. 

Figure 1.9 Shear stress-shear rate behaviour of polyvinylchloride (PVC) in dioctylphthalate (DOP) dispersions at 298K showing regions of shear-thinning and shear-thickening [Boersma et ai, 1990]...

Unitex Chemical has introduced Uniplex FRX 47-88, an alkyl diphenylphosphate FR plasticiser. This complements the existing Unitex olFerings of Uniplex FRP 45, a brominated dioctylphthalate (DOP), and Uniplex FR 44-57, a brominated chlorinated DOP for low temperature plasticiser applications. 

Surfactant electrode. To a slurry of poly(vinyl chloride) (0.6 g, PVC) and dioctylphthalate (2.37 g, DOP), prop-a-CD (0.03 g) dissolv in tetrahydrofuran (8 ml, THE) was added. The whole mixture was well stirred and heated at 60 C to obtain a clear viscous solution, which was then cast on a flat glass plate. The solvent was gradually evaporated in a desiccator. The resulting gel membrane was cut, and placed on one end of a poly(methacrylate) resin tube (11 cm long and 1 cm diameter). The electrode membrane was further "annealed" at 40°C under vacuum for 12 hr, and was then ready for use. This electrode forms a concentration cell ... 

Only specific classes are compatible with particular polyurethane elastomer types. Polyether-based urethanes are compatible with such esters as dioctylphthalate (DOP) and its many analogues. Polyester-based urethanes are not compatible with these phthalate-based esters. Instead, polyester-based urethanes are only compatible with benzoate-based esters. A typical example is dipropylene glycol dibenzoate.t... 

Additives in PVC for infusion bags are stabilisers and plasticisers. By adding a plasticiser a flexible, soft plastic is formed. The amount of plasticiser in PVC can rise to 60 % of the total weight. Plasticisers that are often used are di (2-ethylhexyl)phthalate (DEHP) and dioctylphthalate (DOP). DEHP is the only softener that the Ph. Eur. allows to be used in PVC as material in containers for blood, blood products and aqueous solutions that are used for intravenous infusion. In this case the amount of DEHP in PVC should not be more than 40 % [7]. 

Here, the case of poly(vinyl chloride) (PVC) will be shown briefly. In the case of PVC, we used plasticizers as solvent. Although tetrahydrofurane is a good solvent for PVC, its boiling point is too low for the preparation of the stable gel at ambient temperature in air. In the example shown, the PVC gel plasticized with dioctylphthalate (DOP) was found to creep reversibly like an amoeba by turning on and off the electric field (see Fig. 232) The electrically... 

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