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Diēnu ogļūdeņraži - alkadiēni
File size:
4 KB
ID number:

102874

Author:
Evaluation:
Published: 30.04.2010.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Dabiskie diēnu ogļūdeņraži
Molekulu uzbūve:
ir 2-metil-1,3-butadiēns jeb izoprēns:
CH2=C-Ch=CH2

Dabiskā kaučuka makromolekulām ir stereoregulāra telpiskā uzbūve-atomu grupas –CH2 –atrodas divkāršajām saitēm.

Atrašanās dabā:
Dabisko kaučuku iegūst no kaučukaugu piensulas-lateksa, bet lateksu dabiskā kaučuka ražošanai parasti iegūst no kaučukkoka- hevejas. Tā dzimtene ir Brazīlija. Lai iegūtu no kaučukkoka lateksu, tā stumbrā izdara iegriezumus.

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