Compatibility limit

NPN is completely compatible with the following materials hard copper, ST aluminum alloy, 2S soft aluminum, K Monel, 303 stainless steel and polyethylene. The compatibility limit for 10-20 cold-rolled steel is one year (Ref 4). However, according to Harvey (Ref 3a), addn of as little as 0.05% of a polyhydric ale such as glycerol to NPN will prevent the corrosion of steel... 

The most widely used preservative remains benzalkonium chloride, which often is supplemented with disodium edetate. The benzalkonium chloride defined in the USP monograph is the quaternary ammonium compound alkylbenzyldimethylammonium chloride, in which the alkyl portion is composed of a mixture of chain lengths ranging from C8 to C16. This compound s popularity is based, despite its compatibility limitations, on its being the most effective and rapid-acting preservative with excellent chemical stability. It is stable over a wide pH range and does not... 

IEEE C63.12 Recommended Practice for Electromagnetic Compatibility Limits... 

Electromagnetic Compatibility — Environment Electromagnetic Compatibility — Limits Electromagnetic Compatibility — Testing and Measurement Techniques — General Guides on Harmonics and Interharmonics Measurements and Instrumentation... 

Wide range of fluid compatibilities Limitation in pressure/sizes... 

Efficient mixing. High surface-volume ratio Optimized heating transfer precise temperature control Side-reaction suppression Only soluble substrates-reagents are compatible. Limited reaction-time range small scale... 

Even though ARCNet enjoyed an initial success, it died out as other network architectures became more popular. The main reason for this was its slow transfer rate of only 2.5Mbps. Thomas-Conrad (a major developer of ARCNet products) did develop a version of ARCNet that runs at 100Mbps, but most people have abandoned ARCNet for other architectures. ARCNet is also not based on any standard, which makes it difficult to find compatible hardware from multiple vendors. Because of its speed and compatibility limitations, ARCNet is quickly being replaced in networks. 

It is generally accepted that the translation of solution-phase reactions to solid-phase procedures for the production of compound libraries is usually time-consuming and not always successful. The most robust solid-phase synthesis instrumentation has operational temperature and solvent compatibility limitations that impinge on the direct translation of solution-phase chemistries to the solid phase. These instrument restrictions necessitate a considerable investment in experimentation to rcdclinc the solution-phase reaction protocol for the solid phase. In spite of this apparent obstacle, a substantial number of reactions for solid-phase library production has been pubhshed. Many of these reachons cannot be exploited because the overall product yields are too low (which could lead to ambiguity in the interpretahon of the eventual assay results). Also, some reachons have a restricted range of potential monomers that lead to a hmited diversity of the compounds in the resulting library. 

Frequently contain migratory ingredients, or the compound may adsorb from the product. Therefore some compatibility limitations. 

Where low-temperature flexibility is of importance, adipates, azelates, sebacates, and the epoxidized stearates and tallates are used. Care must be exercised when using these plasticizers in regard to compatibility limits. The low-temperature plasticizers are usually less compatible than the phthalates because of their lower solvent power for the resin. This condition usually requires more heat and/or higher temperatures to obtain adequate fusion. 

If the concentration of low-molecular liquids (solvents) in the polymers surpasses their compatibility limit, they isolate and form spherical arrangements with a size of 10-20 pm in the polymer structure. When the solid phase volume exceeds that of the liquid, the formed structures are of the closed-pore kind and the liquid phase is distributed within the solid phase as local spherical inclusions [122]. As soon as the liquid phase content surpasses that of the solid, a new honeycomb structure with communicating cavities is formed whose solid phase builds up thin walls that separate the cells. This feature is to a greater extent typical of tough and crystallizable polymers. This is also relevant for systems like PE-MO where honeycomb structures with a pore size of up to several micrometers can be formed under certain conditions (Fig. 4.22) [123]. Such porous structures are perfect for the impregnation of modified additives, e.g. Cl. 

Di-n-hexyl adipate Butvar Known compatibility limit 3 1 (4)... 

Note that all of the above eqnations assnme that the polymer-plasticizer system is a single-phase system in a whole range of concentrations. If the compatibility is limited, it is necessary to expect that, at the plasticizer concentration greater than the compatibility limit, the glass transition temperatnre of polymer phase may not vaiy on inctease of plasticizer fraction." That is the concentration dependence of ATg can be described by one of the eqnations (10.13-10.22, 10.24-10.26) only np to the compatibility limit. Outside the compatibihty hmit the glass transition temperature is nearly constant (see Figure 10.34, curve 2). This corresponds to Kanig s inconsistency discussed above. In the case of the weak compatibility these equations may be used only within rather narrow intervals of plasticizer concentrations. 

Figure 11.24 shows that rapid changes in glass transition temperature occur only for lower concentrations of plasticizer (up to 10 wt%). It is known that compatibility limit of dioctyl phthalate with poly(ethylene oxide) is 15 wt%. Free volume increases linearly with the amount of plasticizer increasing but crystallinity of polymer changes only little. This shows that plasticizer modifies mostly amorphous phase. 

Copolymers can be obtained from a single feed (e.g., ethylene) by concurrent tandem catalysis, using two catalysts. The first makes ethylene oligomers, while the second copolymerizes the oligomers with ethylene to give linear, low-density polyethylene (LLDPE). This is illustrated in Scheme 5.8. While the need for mutual chemical compatibility limits possible catalyst combinations in solution, dispersed supported catalysts may be unable to interact as long as they remain immobilized, and may therefore tolerate each other better. However, it is necessary to match the catalytic activity of the two catalysts (via the catalyst ratio, as well as the reaction conditions) so that both contribute significantly to the overall reaction. 

Primary plasticizer n. A plasticizer that, within reasonable compatibility limits, may be used as the sole plasticizer, is completely compatible with the resin, and is sufficiently permanent to produce a composition that will retain its desired properties under normal service conditions throughout the expected Hfe of the article. See also plasticizer and secondary plasticizer. 

IEEE C63.12, 1987, "American National Standard for electromagnetic compatibility limits, recommended practice. ... 

The commodity diesters (e.g., DOP, TOTM, and DIDA) are relatively easy to extract. Moreover, when they have been added at a level beyond their compatibility limit, they will quickly exude and form an oily surface on the application part. 

Uses Detergent, wetting agent, dispersant, foam booster/stablllzer for emulsion polymerization, textile wet processing Features Alkaline compat. limited acid compat. 

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