atactic

Adjective

Meaning

lacking motor coordination; marked or caused by ataxia

Synonyms

Antonyms

Examples

Both isotactic and syndiotactic polypropylene are crystalline, whereas atactic polypropylene, which can also be prepared with special Ziegler–Natta catalysts, is amorphous. Source: Internet

A polymer that lacks any regular arrangement in the position of its alkyl substituents (R) is called atactic. Source: Internet

If a special catalyst is used in its synthesis it is possible to obtain the syndiotactic version of this polymer, but most industrial polystyrene produced is atactic. Source: Internet

There are three types: isotactic (all substituents on the same side), atactic (random placement of substituents), and syndiotactic (alternating placement of substituents). Source: Internet

The result is that, whereas syndiotactic PS is a semicrystalline material, the more common atactic version cannot crystallize and forms a glass instead. Source: Internet

The two materials have very different properties because the irregular structure of the atactic version makes it impossible for the polymer chains to stack in a regular fashion. Source: Internet

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