Drawing solid-state

Cold-drawing/solid-state extrusion of semicrystalline polymers involves initially the deformation of the spherulitic structure, the subsequent transformation of the spherulitic structure to a fibrillar structure and, finally, the plastic deformation of the fibrillar structure. 

In the solid state, sulfur is sometimes found in rings of six atoms, (a) Draw a valid Lewis structure for Sb. (b) Is resonance possible in S6 If so, draw one of the resonance structures. 

There are many different polyatomic anions, including several that are abundant in nature. Each is a stable chemical species that maintains its stmcture in the solid state and in aqueous solution. Polyatomic anions are treated as distinct units when writing chemical formulas, naming compounds, or drawing molecular pictures. The names, formulas, and charges of the more common polyatomic anions are listed in Table 3-4. You should memorize the common polyatomic ions because they appear regularly throughout this textbook. 

The only conclusion that we can draw is that diffusion-controlled solid state reactions tend to produce mixtures of compounds, the relative ratio of which is related to their thermod5rnamic stability at the reaction temperature. Obviously then, if we change the temperature of reaction, we would expect to see somewhat different mixtures of compounds produced. 

Given that Gd.203 reacts with AI2O3 to form GdA103, draw a diagram showing the reaction conditions, the phase boundary formed and the diffusion conditions likely to prevail in the solid state reaction. 

Fig. 1. ORTEP drawing of the solid-state structure of 2,2, 3,3, 4,4, 5,5 -octamethyl-Ll -diarsaferrocene (44). [Reprinted with permission from Ashe et al.19 Copyright 1994 American Chemical Society.]...

This chapter draws a comprehensive picture of what has been done in the field of dendrimers with polymeric cores putting emphasis first on synthetic issues and then on experiments investigating the aggregation behavior of these intruiging macromolecules both in the solid state and on surfaces. Additionally, experiments will be described which show that some of these dendrimers can be considered cylindrical molecular objects. The macromolecules treated in this chapter may be considered as either dendrimers with polymeric core or alternatively dendronized polymers (or polymers with appendent dendrons) depending on whether one sees them from the vantage point of an organic or macromolecular chemist. 

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. 

Four monothioimides la-d were investigated for their solid-state photochemical behavior. All monothioimides except lb, which did not give available crystals, were subjected to X-ray single crystal analysis. Figure 1 shows the Ortep drawing of la (Fig. la), Ic (Fig. lb), and Id (Fig. Ic). 

Dilatometric studies have demonstrated the negative thermal expansivity for many oriented crystalline polymers 64,170 176). The results of these experimental studies may be summarized as follows. Cold-drawing of PE below Tm 172) and solid-state extrusion under elevated pressure 170 1711 lead to a monotonous decrease of the positive thermal expansion coefficient with increasing draw ratio. At a certain degree of orientation, dependent on temperature, PM becomes negative with Pi < Pell (Fig. 16). This is the second way of reaching negative expansivity applied, e.g. to POM (w = 63 % Tdr = 423 K) 173>. 

Ultralife Batteries Inc. has recently announced the development of their Rechargeable Solid State System based on this technology. A schematic drawing of the cell is shown in Fig. 7.41. Single cells and battery packs are now in production. Energy densities in the ranges 100-125 Wh/kg and 200-300 Wh/dm3, as well as cyclability up to 1200 deep cycles, have been reported. Excellent characteristics are claimed. Cellular telephones, portable computers and camcorders appear to be the most suitable outlets for these PLI batteries. 

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