Therm

Using the coordinates of special geometries, minima, and saddle points, together with the nearby values of potential energy, you can calculate spectroscopic properties and macroscopic therm ody-riatriic and kinetic parameters, sncfi as enthalpies, entropies, and thermal rate constants. HyperChem can provide the geometries and energy values for many of these ealeulatiori s. 

Santoquin Santoquin [91-53-2] Santo therm Santyl Sanudorm Sanuril... 

Theovent The 0x0 process Therapeutic agents Therapeutic enzymes Therapeutic lenses Therapeutic role Therbar Therm-8 Thermal analysis... 

Thermal reforming Thermal sensitization Thermal stability Thermal transfer Thermal-transfer printing Thermal treatment Thermal wave imaging Thermate Thermate-TH2 Thermate-TH3 Therm-Chek... 

An interesting material with both electro- and therm ochromism behavior, Li VO2 was evaluated for a "smart window" appHcation (25). Films of Li V02 were prepared by reactive sputtering and annealing an electrolyte of LiClO and propylene carbonate. 

MCVD process (Fig. 7) the reactants enter the tube, are reacted in the hot 2one of the torch, deposit therm oph oretically downstream of the torch, and are subsequendy sintered to a clear glass as the torch passes over the deposited particulate layer. Once the desired stmcture has been deposited, the direction of the torch is reversed and the tube is collapsed to form a soHd preform. 

Acrylonitrile—Butadiene—Styrene. Available only as sheet, ABS has good toughness and high impact resistance. It is readily therm oform able over a wide range of temperatures and can be deeply drawn. ABS has poor solvent resistance and low continuous-use temperature. It is often used in housings for office equipment (see Acrylonitrile polymers). 

Because of poor therm oform ability, there are relatively few apphcations for polypropylene sheet. New soHd-phase pressure forming (SPPE) techniques are under development for forming PP sheet. Polypropylene is used in coextmded sheet to some extent for food packaging containers. Glass-filled, wood-filled, or other modified polypropylene sheet materials are used in limited automotive apphcations. 

Eoamed polystyrene sheet has exceUent strength, thermal resistance, formabUity, and shock resistance, as weU as low density. It is widely known for its use in beverage cups, food containers, building insulation panels, and shock absorbent packaging. Polystyrene products can be recycled if suitable coUection methods are estabUshed. Eoamed polystyrene sheet can also be easily therm oformed (see Styrene plastics). 

Decafluorobiphenyl [434-90-2] C F C F (mol wt, 334.1 mp, 68°C bp, 206°C), can be prepared by I Jllmann coupling of bromo- [344-04-7] chloro- [344-07-0] or iodopentafluorobenzene [827-15-6] with copper. This product shows good thermal stabiHty decafluorobiphenyl was recovered unchanged after 1 h below 575°C (270). Decafluorobiphenyl-based derivatives exhibit greater oxidative stabiHty than similar hydrocarbon compounds (271). Therm ally stable poly(fluorinated aryl ether) oligomers prepared from decafluorobiphenyl and bisphenols show low dielectric constant and moisture absorption which are attractive for electronic appHcations (272). 

Thermoforming includes the extmsion of sheets, thicker than 0.25 mm, followed by forming a reheated sheet in an open-face mold by pressure, vacuum, or both. Sheet of less than 0.25 mm thick is therm oformed in-line, and filled and sealed with contents such as processed meats, cheeses, and pastas. 

Therm alane Heat- Transfer Fluids. Coastal Chemical Co. manufactures three heat-transfer fluids intended for Hquid-phase systems. 

Therm alane L is a synthetic paraffin intended for low temperature appHcations. Therm alane 600 and Therm alane 800 are synthetic paraffins. 

J. Therm. Insul (now/ Therm. Insul Build. Env.) Technomic Publishing Co., Inc., Lancaster, Pa., 1980—1993. 

P. Caidfllo, A. Quattrini, E. Vajna de Pava, and A. Gitelb, J. Calorim. Anal Therm. Thermodyn. Chim. 17, 394—397 (1986). 

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