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WIKIPEDIA FOR SCHOOLS: English - Spanish - French - Portuguese

Polistirols - Vikipēdija Wikipedia (2007) - wikipedia2007.classicistranieri.com

Polistirols

Vikipēdijas raksts

Polistirols ir ciets, caurspīdīgs polimērs, kuru iegūst, polimerizējot stirolu. Tīrs polistirols ir cieta, trausla plastmasa. Polistirols ir termoplastisks polimērs. Polistirols labi deg ar kūpošu liesmu, tas ir visai ugunsnedrošs.

Polistirolu parasti iegūst ar radikāļu polimerizāciju. Šāds polistirols nekristalizējas, tas ir stiklveidīgs. Putu polistirols ir viens no izplatītākajiem putuplasta veidiem. Lai samazinātu tīra polistirola trauslumu, to kopolimerizē ar butadiēna vai akrilnitrila-butadiēna kaučuku. Šāds materiāls vairs nav caurspīdīgs. No šādas plastmasas izgatavo daudzu elektronisku aparātu korpusus.

Vikipēdijas fragments   Šis raksts par organisko ķīmiju ir nepilnīgs. Jūs varat dot savu ieguldījumu Vikipēdijā, papildinot to.
Saturs iegūts no "http://lv.wikipedia.org../../../p/o/l/Polistirols.html"
STATIC WIKIPEDIA JUNE 2008 on wikipedia2006.classicistranieri.com

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STATIC WIKIPEDIA MARCH 2008 on wikipedia2006classicistranieri.com
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STATIC WIKIPEDIA APRIL 2007 on wikipedia2006classicistranieri.com
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STATIC WIKIPEDIA DECEMBER 2006 on wikipedia2006classicistranieri.com
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STATIC WIKIPEDIA NOVEMBER 2006 on wikipedia 2007classicistranieri.com
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