Izoprēns
| Izoprēns | |
|---|---|
  Izoprēna struktūrformula un molekulas modelis | |
| Ķīmiskā formula | СН2=С(СН3)—СН=СН2 |
| Molmasa | 68,11 g/mol |
| Blīvums | 681 kg/m3 |
| Kušanas temperatūra | -146 °C |
| Viršanas temperatūra | 34 °C |
Izoprēns (2-metil-1,3-butadiēns, СН2=С(СН3)—СН=СН2) ir ogļūdeņradis (alkadiēns) ar divām konjugētām dubultsaitēm (dubultsaitēm, starp kurām ir viena vienkāršā saite). Izoprēns ir bezkrāsains, etilspirtā šķīstošs šķidrums.
Iegūšana
- Izoprēnu var iegūt, dažu terpēnu (limonēna, dipentēna, terpentīna) tvaikiem saskaroties ar nokaitētu platīnu, kā arī, destilējot dabīgo kaučuku.
- Rūpnieciski izoprēnu iegūst no acetona un acetilēna, vai arī izoamilspirta.
Izmantošana
Izoprēnu lieto kā sintētiskā kaučuka izejvielu.
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