(of a polymer or polymer structure) in which the repeating units have no regular stereochemical configuration.
- ‘But if there is no order, as is the case with the atactic polystyrene, packing can't occur.’
- ‘Depending on the location of the side groups and the nature of the starting monomers, linear polymers can have various structural isomers denoted as isotactic, syndiotactic, or atactic.’
- ‘Traditional polymer synthesis results in the random (atactic) location of the side-groups either to the left or right of the polymer chain.’
Mid 19th century: from Greek ataktos, from a- not + taktos arranged + -ic.