Intelligent Plastics

Adelino Quaresma de Amorim Grandson Francisco Edivan Incio de Sousa Course of Full Licenciatura in Chemical Federal University of the Piau Encontramos the polymers (group of chemical composites formed by combination of you vary molecules to form more complex molecules) in practically everything that we use nowadays: fabrics, medicines, storages of information amongst other applications. The plastics, result of one mixes polimrica answers to one definitive one stimulates of reprodutvel form and specifies, receiving a denomination from intelligent plastics. Such stimulatons are: I stimulate electric, provoking change of color, contraction with movement mechanical or reaction of reduction or oxidation, appearance of potential electric (Capacity that an energized body has to carry through a work), sensor of pH, one I even though stimulate with acidity variation and a change of electric condutividade. The plastic most intelligent and older than we know is rubber, known very before the arrival of the Quilombo to America. The rubber is considered an intelligent material, because after passing for a treatment with sulfeto or sulphur it could be more resistant and after being deformed by mechanical effort, comes back to its original state. The comumente used plastic classroom in the current days is of eletroativos polymers. They are called thus, because they can reversiblely be converted into oxides or be reduced in chemical processes. They are constituted of carbons with double linking alternated with simple linkings calls of conjugated double linkings.

Plastics intelligent to be used make necessary construction of cell electrochemical (joint complete that constitutes a stack), constituted of two electrodes (metallic bar, graphite piece or even though a uncovered wire piece) a work electrode, one against? electrode and an electrolyte (it substantiates, that in solution it leads electric chain) responsible for the closing of the internal circuit of the cell. The used intelligent plastics more in this type of device are polipirrol, the politiofeno or the polianilina. Perhaps the one of the applications most important of these types of plastics either assembly of devices, I stimulate where it of an electric either answered chain with a mechanical movement. Therefore, according to Landmark. of Paoli, eletroativos doctor in Chemistry and Professor of the Institute of Chemistry of the Unicamp, polymers, here intelligent plastic calls, are used nowadays in applications sufficiently special and in the used future they will be each time more. It has works that they show that they can substitute with advantage the semiconductors (controlling of electric chain) traditional. It fits to chemistries, physicist and engineers to use the imagination and ability to become Real many ideas that will appear on polymers or intelligent plastics. Bibliographical references:

Printed Concrete

The History of the Printed Concrete the Printed concrete increased in popularity in years 1970, when of Concrete was introduced first in the World. Construction saw it as a new way to satisfy the customer and to make its work simultaneously budget. This concrete technique stamp was made in last the 50 years. When the concrete stamp started, had very few options of design and colors. However, as the industry grew more standards of would print had been being printed concrete is an covering that is recorded printed matter or in concrete, while it still is in its state or plastic moldvel.

Standards frequent resemble a texture of natural rock and appearance, but any standard or drawing can be printed or stamped in the soft surface concrete. This is a simple summary of as the fact the printed concrete. 1. The first step is to level and to compact the land protecting all the adjacent or neighboring surfaces. 2. If it will be a floor that will be used for passes through of vehicles heavy will have to be protected with steel screens in contrast will not be necessary time that this type of floor does not need contrafloor.

3 After that the concrete is poured in the surface and anto, smoothened and leveled for the hillside eo desired finishing. 4. After that the color desired for the customer through pigments is added colorful. 5. The concrete is resting until the ideal point for impression of the printed one. An able professional will know when it is ready, but generally is when the concrete leaves an impression to the being pressured with a finger, fellow creature to the glassworker mass. 6. A liquid desmoldante or in dust is applied in the surface of the concrete and is used to help to separate the mats of the form of drawing of the surface. 7. The forms of the chosen drawing are applied to the surface and strokes with a tool to pressure them in the concrete. When they are removed leave the desired drawing. 8. A time done the drawings in the concrete is left to define the cure. 9. When the concrete enough will be cured or hardened, the surface clean and the control of meetings is made and washed the surface with seladora a detergent neutral and applied and acrylic resin that will give protection to the floor. 10. This resin and seladora can be reapplied to each two or three years to keep the surface of the printed concrete always pretty. This explains the basic concepts of printed concrete. It has much more of what the eyes even so. A craftsman of printed concrete professional must understand of concrete, hillsides, classification, formation, finishing, coloration, selantes and more to reach resulted positive of each time. She is necessary years of practical and more professional they are truily talentosos craftsmen.