Taffies

Tafel equation Tafel kinetics Tafel slope Taffy process Taft s SV function Tagamet [51481-61-9] d-Tagatose... 

Polyfunctional aliphatic resins have exhibited high reactivity and degrees of cure with amines but problems of toxicity have diminished their usehilness and commercial interest. SoHd epoxy resins can be prepared by the taffy process or the advancement process. 

Taffy Process. Bisphenol A reacts direcdy with epichlorohydrin in the presence of a stoichiometric amount of caustic. The molecular weight of the product is governed by the ratio of epichlorohydrin—bisphenol A. 

In practice, the taffy process is generally employed for only medium molecular-weight resins (1) (n = 1-4). The polymerization reaction results in a highly viscous product (emulsion of water and resin) and the condensation reaction becomes dependent on agitation. At the completion of the reaction, the heterogeneous mixture consists of an alkaline brine solution and a water—resin emulsion and recovery of the product is accompHshed by separation of phases, washing of the taffy resin with water, and removal of water under vacuum. 

Gel-permeation chromatography studies of epoxy resins prepared by the taffy process shown n values = 0, 1, 2, 3, etc, whereas only even-numbered repeat units are observed for resins prepared by the advancement process. This is a consequence of adding a difunctional phenol to a diglycidyl ether derivative of a difunctional phenol in the polymer-forming step. 

Various cation radical salts [(ppy)Au(S-S) 2 anion 11solvent (S-S = CgH4Sg or CgH4Sg02, anion = PF6, BF4 , AsFfi. TaFfi. solvent = PhCl, n = 0-0.5) were prepared by constant current electrolysis of their benzonitrile or chlorobenzene solutions containing (Bu Xanion) as electrolyte [26, 27, 35, 37]. 

When the reaction is completed, the agitation is stopped and a taffy (which is an emulsion of about 30 per cent water in resin) rises to the top of the reaction mixture. The lower layer of brine is removed, the resinous layer gets coagulated and washed with hot water, clarified by passing through a filter and finally allowed to solidify. 

Celati, R., Noto, P., Panichi, C., Squarci, P. Taffi, L. 1973. Interactions between the steam reservoir and surrounding aquifers in the Larderello geothermal field. Geothermics, 2, 174-185. 

Sand traversing the length of a skim pile will abrade against the taffies and be water washed This can be said to remove the free oil, which is then raptured in a quiescent zone... 

The epoxidalion is generally conducted in iwo steps (11 the polyol is added to cpichlorohydrin in the presence of a Lewis acid catalyst (stannic chloride, boron irifluoride) to pruduce the chlorollydrin intermediate, and (2] the intermediate is dchydrohalogenaled with sodium hydroxide iu yield the aliphatic glycidyl ether. Solid epoxy resins are prepared by the Taffy or Advancement processes. 

Vianna EP, Ferreira AT, Dona F, Cavalheiro EA, Silva Fernandes MJ (2005) Modulation of seizures and synaptic plasticity by adenosinergic receptors in an experimental model of temporal lobe epilepsy induced by pilocarpine in rats. Epilepsia 46(Suppl 5) 166-173 Volpini R, Costanzi S, Lambertucci C, Taffi S, Vittori S, Klotz KN, Cristalli G (2002) N(6)-alkyl-2-alkynyl derivatives of adenosine as potent and selective agonists at the human adenosine A(3) receptor and a starting point for searching A(2B) ligands. J Med Chem 45(15) 3271-3279... 

Volpini R, Dal Ben D, Lambertucci C, Taffi S, Vittori S, Klotz KN, Cristalli G (2007) N6-methoxy-2-alkynyladenosine derivatives as highly potent and selective ligands at the human A3 adenosine receptor. J Med Chem 50(6) 1222-1230... 

TAFFY WILLIAMS, JULES SHAFER, and IRWIN GOLDSTEIN... 

Com syrup (polysaccharide) and sucrose are cooked together producing larger polysaccharides and eventually forming a plastic mass. Peanuts are added, as is baking soda (sodium bicarbonate) to provide small bubbles of CO that decrease the density. A little butter is added, partly for flavor partly for texture, and partly to reduce sticking. The hot, molten composite is spread out in thin sheets and cooled. In some recipes, the still hot, taffy-like material is stretched to produce a thinner transparent final product. 

Viscosity of Neutral Resins. The neutral resins, both unmodified and carbohydrate-modified, were very viscous. The resins have a consistency of taffy candy. This might present problems in their utilization with present commercial equipment, although equipment for applying foamed resins might be suitable. 

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