Temperature Thermal entries

TDI isomers, 210 Tear strength tests, 242-243 TEDA. See Triethylene diamine (TEDA) Telechelic oligomers, 456, 457 copolymerization of, 453-454 Telechelics, from polybutadiene, 456-459 TEM technique, 163-164 Temperature, polyamide shear modulus and, 138. See also /3-transition temperature (7)>) Brill temperature Deblocking temperatures //-transition temperature (Ty) Glass transition temperature (7) ) Heat deflection temperature (HDT) Heat distortion temperature (HDT) High-temperature entries Low-temperature entries Melting temperature (Fm) Modulu s - temperature relationship Thermal entries Tensile strength, 3, 242 TEOS. See Tetraethoxysilane (TEOS)... 

Support-bound indoles can be modified in several ways. N-Alkylation of polystyrene-bound indoles has been achieved by treatment with reactive alkylating agents (Mel, BnBr, BrCH2C02R) in conjunction with NaH or KOrBu as a base in DMF at room temperature (Entries 1 and 2, Table 15.7). The aminomethylation of indole at C-3 proceeds smoothly on cross-linked polystyrene. The resulting (aminomethyl)in-doles are thermally unstable and undergo substitution reactions with various carbon nucleophiles (e.g. cyanide or nitroacetates) at higher temperatures (Entry 4, Table... 

For a discussion of the uncertainties associated with the equation of state and thermal conductivity entries of this table, please see the source references given above. The uncertainty in viscosity is 1% in the liquid below 474 K, 2% in the liquid at higher temperatures and in the vapor, and 5% between 623 and 723 K at pressures between 16 and 50 MPa. The uncertainty in viscosity is 2% in the liquid below 623 K and in the vapor below 573 K, 5% elsewhere in the liquid and vapor, and 10% in the critical region (623 to 723 K and 21.66 to 50 MPa). 

A few free radicals are indefinitely stable. Entries 1, 4, and 6 in Scheme 12.1 are examples. These molecules are just as stable under ordinary conditions of temperature and atmosphere as typical closed-shell molecules. Entry 2 is somewhat less stable to oxygen, although it can exist indefinitely in the absence of oxygen. The structures shown in entries 1, 2, and 4 all permit extensive delocalization of the unpaired electron into aromatic rings. These highly delocalized radicals show no tendency toward dimerization or disproportionation. Radicals that have long lifetimes and are resistant to dimerization or other routes for bimolecular self-annihilation are called stable free radicals. The term inert free radical has been suggested for species such as entry 4, which is unreactive under ordinary conditions and is thermally stable even at 300°C. ... 

Heat exchanger Effectiveness (or thermal ratio) e = Temperature rise (cold side (/maximum temperature difference between entry (hot side) and entry (cold side)... 

Thus the cooled reversible cycle [CHT]rci with a first rotor inlet temperature, Tj, will have an internal thermal efficiency exactly the same as that of the uncooled cycle [CHTJru with a higher turbine entry temperature 3 = Tr, and the same pressure ratio. There is no penalty on efficiency in cooling the turbine gases at entry but note that the specific work output, w = (wj — wc)/CpT = [(0 /x) — 11(j — 1), is reduced, since 0 < 0. 

Investigating thermal stabilities of compounds 23-28 revealed that when heated to 80 C the compounds containing PPh,i i.e., 23,25, and 27, were less stable than their PCyy bearing analogues (24, 26, and 28, respectively). The least stable was (PPhy)2Cl2Ru(3-phenylindenylid-l-ene) (23) which decomposed after 2 h at 80 C (Table IX, entry 1) and the most stable was (lPr)(PPhy)Cl2Ru(3-phenylindenylid-1 -ene) (27) (Table IX, entry 4) which showed decomposition after 42 h at the same temperature. It can be concluded that the presence of the nucleophilic carbene... 

Due to some stability concerns with the N-Cbz group of 8 at high temperatures, compound 25 was used as a model substrate for the reaction. Substrate 25 was irradiated for 2 min (internal temperature reached 185 °C) in a variety of solvents and all thermal reactions reached >95% conversion (Table 6.1). Both aprotic polar solvents (entries 6 and 9) and protic polar solvent (entry 7) gave poor assay yields of product 26. With nonpolar solvents (entry 10) such as o-xylene and xylenes, the rearrangement reaction provided the highest assay yield and proved to be the best solvent choice [9e],... 

While doubly activated dienophiles gave moderate to good yields under thermal conditions (Table 11), mono activated alkenes such as cyclohexenone (123) failed to react at temperatures up to 150 °C but underwent cycloaddition under Lewis-acid catalysis even if with poor yields (Table 12, entries 1-3) [32],... 

Blog Entry 2 At 250mA, your lamp is unlikely to be solid-state. Incandescent lamps may draw considerably more current than you think at startup, if the element temperature is not at thermal equilibrium. Though one Hertz is fairly fast for thermal effects, it is worth keeping an eye on. 

To overcome thermal entry effects, the segments may be virtually stacked with the outlet conditions from one segment that becomes the inlet conditions for the next downstream section. In this approach, axial conduction cannot be included, as there is no mechanism for energy to transport from a downstream section back to an upstream section. Thus, this method is limited to reasonably high flow rates for which axial conduction is negligible compared to the convective flow of enthalpy. At the industrial flow rates simulated, it is a common practice to neglect axial conduction entirely. The objective, however, is not to simulate a longer section of bed, but to provide a developed inlet temperature profile to the test section. 

Temperature(s). See also Blackbody temperature sensor Cure temperature Curie temperature Eutectic temperature Fictive temperature Furnace temperature Glass- transition temperatures Heat entries Heating Hot entries Refrigeration Target temperature emperature measurement Thermal entries Thermo-entries Transition temperatures in analysis of water, 26 35 biofiltration system, 10 76 in biological wastewater treatment,... 

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