atactic


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Related to atactic: syndiotactic polymer

atactic

[ā′tak·tik]
(organic chemistry)
Of the configuration for a polymer, having the opposite steric configurations for the carbon atoms of the polymer chain occur in equal frequency and more or less at random.
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The presence of a greater number of defects and functional groups on the surface of GNP and TRGO compared to nanographite provides a higher content of atactic fraction and a lower polymerization yield in the presence of these nanoparticles.
The molecular structures of isotactic, syndiotactic, and atactic configurations of PPVA are illustrated in Figure 7.
Both the random (atactic, top) and alternating (heterotactic, middle) patterns result in polymers that are amorphous, with relatively low melting points.
Mattice, "Molecular Origin of Demixing, Prior to Crystallization, of Atactic Polypropylene/Isotactic Polypropylene Blends upon Cooling from the Melt," J.
A commercial grade of general-purpose atactic PS was purchased from Polystyrene Australia (PSA) (Melbourne, Australia)--a high melt flow index (MFI) grade PS (Austrex 555) (PS555) developed primarily for thin walled injection moulding.
Bituline(R) Prima The Prima" series consist of plastomeric membranes modified with Atactic Polypropylene" (APP).
Before preparing the polymer concrete composites, one set of polypropylene atactic fibers (CONSA, Distrito Federal, Mexico) whose diameters vary from 50 to 60 [micro]m were cut to 10 mm length on the average.
Homopolymer comes in isotactic, atactic, and syndio-tactic forms, which relate to the molecular structure.
investigated the effect of polymer type on temperature-programmed copyrolysis of Turkish oil shales with atactic polypropylene (APP) and low-density polyethylene (LDPE) [16, 17].
The trainer of any team has to create atactic to win, that's all.
The top layer is comprised of a mixture of: (a) polypropylene modifiers comprised of isotactic polypropylene, ethylene-propylene copolymer, atactic polypropylene and polyethylene, (b) filler and (c) asphalt.
Metallocenes have been designed that enchain prochiral monomers like propylene in atactic, isotactic, syndiotactic and hemi-isotactic orientations.