Thin flexible

The most effective antiozonants are the substituted PPDs. Their mechanism of protection against ozone is based on the scavenger-protective film mechanism [68-70]. The reaction of ozone with the antiozonant is much faster than the reaction with the C=C bond of the rubber on the rubber surface [56]. The rubber is protected from the ozone attack tUl the surface antiozonant is depleted. As the antiozonant is continuously consumed through its reaction with ozone at the mbber surface, diffusion of the antiozonant from the inner parts to the surface replenishes the surface concentration to provide the continuous protection against ozone. A thin flexible film developed from the antiozonant/ozone reaction products on the mbber surface also offers protection. 

FIG. 75. Schematic drawing of an electrostatic loudspeaker a. thin flexible foil coated with tt-Si H (or graphite) b. perforated flat fixed plates. 

Project (by Sarnoff Corp with DuPont de Nemours and Co Central Research and Development) to print organic transistors on plastic for electronic displays and circuits. The goal is to develop materials, thin flexible plastic substrates, and methods for continuous high-resolution printing. 

A larger number of companies are active in the LEP area. DuPont s purchase of Uniax and its technology gave them the necessary intellectual property to marry with their expertise in plastic substrates. Their aim is to produce devices on thin flexible substrates such as nylon and PET etc. that, they believe, will bring a manufacturing cost advantage over low MW materials. It is collaborating with Phillips who has a production scale unit in Holland for small alphanumeric displays suitable for watches and mobile phones. 

NGu exists in at least 2 cryst modifications, an alpha and a beta. The alpha form may be prepd by dissolving GuN in 00ned sulfuric acid and drowning in w. It crystallizes from hot w as long, thin, flexible, lustrous ndls which are tough and pulverize with difficulty. 

FIGURE 6.2 A film of polyacetylene forms on the inner surface of the reaction vessel, after ethyne gas passes over the catalyst solution of the walls. The paper-thin flexible sheet of polyacetylene is then stripped from the walls before doping. (Photograph by James Kilkelly. Originally published in Scientific American)... 

In our investigation, we noticed that a metallic foil surface, being put near one of the ends of the discharge chamber, was covered with some flat uncolored ledges. At more attentive examination these ledges prove to be thin, flexible, needle-like plates growing densely perpendicular to a foil. 

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