a·tac·tic

(ā′tăk-tĭk)

adj.

Of or relating to a polymer lacking structural regularity.

[a- + Greek taktikos, of order; see tactics.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

atactic

(eɪˈtæktɪk)

adj

1. (Chemistry) chem (of a polymer) having random sequence of the stereochemical arrangement of groups on carbon atoms in the chain; not stereospecific

2. (Pathology) pathol relating to or displaying ataxia

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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Adj.

atactic - lacking motor coordination; marked or caused by ataxia

ataxic

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atactique

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References in periodicals archive

The content of atactic fraction, determined by fractionation in n-heptane, was found to be, about, 1 % wt, which is characteristic of effective isospecific metallocene systems.

In Situ Polymerization of Propylene with Carbon Nanoparticles. Effect of Catalytic System and Graphene Type

In 5% of cases, symptoms of the central nervous system e.g., ptosis, depression, dementia, atactic gait, insomnia, personality changes and meningitis are reported [15].

Whipple's disease as a systemic infectious disease--a case presentation

The "Prima" series consist of plastomeric membranes modified with "Atactic Polypropylene" (APP).

Bituline(r) gives a complete, economical, long lasting waterproofing solution

Typical Glass-Transition Values Polymer Tg, C Nylon 6 47 Nylon 66 70 PE -80 Polyvinylidene fluoride -35 PP (atactic) -20 Polyvinyl fluoride -20 PP (isotactic) 0 Poly-3-hydroxybutyrate 15 Polyvinyl acetate 30 Polychlorotrifluoroethylene 45 Polylactic acid 60-65 PET 70 PVC 80 Polyvinyl alcohol 85 PS 95 Polymethyl methacrylate 105 ABS 105 Polytetrafluoroethylene 115 PC 145 Polvsulfone 185 Source: Wikipedia

How to adjust for shrinkage and orientation

atactic propylene/APP, styrene butadiene styrene/SBS, styrene isoprene styrene/ SIS, etc.)

Membrane maintenance for modified bitumen: how to achieve maximum longevity

Polymer Blends of Natural Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and a Synthetic Atactic Poly(3-hydroxybutyrate).

Porous three dimensional (3-D) scaffolds of poly(3-hydroxybutyric acid) (PHB) and poly(3-hydroxybutyric-co-3-hydroxyvaleric acid) (PHBV): determination of salt leaching efficiency of solvent-casting particulate-leaching (SCPL)

Classification of volatile products evolved from the temperature-programmed co-pyrolysis of Turkish oil shales with atactic polypropylene (APP).

Fast pyrolysis and co-pyrolysis of Goynuk oil shale (Turkey) and polypropylene in Free Falling Reactor (FFR)

At earlier stage (1h) of the reaction, molar ratios of isotactic (mm), atactic (mr), and syndiotactic (rr) pHEMA were 39, 13, and 48 mol%, respectively (Table 1).

Novel synthesis of cellulose-based diblock copolymer of poly(hydroxyethyl methacrylate) by mechanochemical reaction

The photoluminescence (PL) spectra for PPVA films exhibit broad emission bands which correspond to n [left arrow] [[pi].sup.*] electronic transition of the OH groups characteristic of three distinctive polymer configurations (isotactic, syndiotactic, and atactic) in the aqueous solution.

Effect of phosphoric acid concentration on the optical properties of partially phosphorylated PVA complexes