Styropor

Überarbeitete Version!

Ich muss morgen Montag den 29.9. eine Diashow Präsentation für einen Kurs halten. Als Thema kann ich mir irgendwas aussuchen, also habe ich mir Styropor aka Polystyrene ausgesucht. Hier die morgige Präsentation:

[flv:http://blog.grundstil.de/Vlog/polypraesiblog.flv 540 404]

Sources:

• http://en.wikipedia.org/wiki/Polystyrene
• http://www.americanchemistry.com/
• Song “Space Maker” by AIR from their Album “Pocket Symphony”

Transcript:

say -o test.aiff Polystyrene is an aromatic polymer made from the aromatic monomer styrene, a liquid hydrocarbon that is commercially manufactured from petroleum by the chemical industry. Polystyrene is a thermoplastic substance, normally existing in solid state at room temperature, but melting if heated for molding or extrusion, and becoming solid again when cooling off.

say -o poly2.aiff  Polystyrene is one of the most widely used kinds of plastic. Pure solid polystyrene is a colorless, hard plastic with limited flexibility. It can be cast into molds with fine detail. Solid polystyrene is used, for example, in disposable cutlery, plastic models, CD and DVD cases, and smoke detector housings. Products made from foamed polystyrene are nearly ubiquitous, for example packing materials, insulation, and foam beverage cups. Discarded polystyrene, which does not biodegrade, is often abundant in the outdoor environment, particularly along shores and waterways.

say -o poly3.aiff Foam cups and other polystyrene products can be safely buried in landfills, since it is as stable as concrete or brick. The majority of polystyrene products are currently not recycled because of a lack of suitable recycling facilities. A campaign to achieve the first ban of polystyrene foam from the food and beverage industry in Canada has been launched in Toronto as of January 2007, by local non-profit organization NaturoPack.

say -o poly4.aiff There is concern about the trace presence of polystyrenes production chemicals in the final plastic product, most of which are toxic if not removed. For instance benzene, which is used to produce ethylbenzene for styrene, is a known carcinogen. As well, unpolymerized styrene may pose health risks. Human studies are inconclusive on the reproductive and developmental effects of styrene. several studies did not report an increase in developmental effects in women who worked in the plastics industry, while an increased frequency of spontaneous abortions and decreased frequency of births were reported in another study. Several epidemiologic studies suggest there may be an association between styrene exposure and an increased risk of leukemia and lymphoma.

say -o poly5.aiff Polystyrene Gets the Job Done! Nothing else offers the combination of strength, lightness and durability to protect valuable objects from crystal to computers, from morning coffee to salad at lunch, from your children to you! Polystyrene food service products are generally more economical to use than disposable paperboard products and reusable food service items.Today’s busy lifestyles require the convenience of affordable and quick take-out meals. Polystyrene packaging meets the demands of today’s modern lifestyles by offering an economical and high quality food service product.

The “say -o” commands relate to a vey cool function of Mac OS X