tacticity


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tacticity

(tækˈtɪsɪtɪ)
n
(Chemistry) the quality of regularity in the arrangement of repeated units within a polymer chain
Translations
tacticité
References in periodicals archive ?
[T.sub.g] of an amorphous polymer can be strongly influenced by molecular weight, tacticity, sample weight, laboratory processing conditions, and used ramp rate for the experiment [36-39].
"Controlling and proving tacticity is not a trivial process.
Now the factors relating to the characteristics of the polymer are: the porosity of the polymeric matrix since the biodegradation happens by the accession of the microorganisms in the material, the nature of the pre-treatment, the melting temperature, the surface area, the type of group also in the main chain, the types of connections, the conformational flexibility, the tacticity, the degree of crystallinity, the presence of additives and plasticizers [43].
Among the many techniques for structural control of polymers, a particular attention is focused on the tacticity control in the radical synthesis of polymers.
As both scientifically and industrially significant as these developments have been, these alkene polymerization reactions dealt only with "tacticity", i.e., relative stereochemistry rather than absolute stereochemistry.
The possible reason for the good behavior of the corrosion inhibition efficiency of poly(TBPMA-co-GMA) may be tacticity. TBPMA contains three bulky Br atoms directly attached to the phenyl ring that are oriented in the opposite side of GMA due to the electronic cloud arrangement.
So, we next investigated the tacticity of pHEMA in the MCC-block-pHEMA produced by the mechanochemical reaction using 1H-NMR (Figure 3).
Basically, tacticity is used to describe the way pendent groups on a polymer chain are arranged on a polymer backbone.
Kenise, a Sister of the order of St Joseph in South Australia, contacted me at my office at Monash University in 2009 to raise the possibility that Ruth employed a set of child rearing methods that were distinctly influenced by Aboriginal lifeways and Aboriginal women's practices of nurturing learning and self- sufficiency, grounded in play, tacticity and story.
Silane chemicals can be used during polymerization to modify catalyst activity and polymer tacticity.
Tacticity, in this case, corresponds to the relativity of that enlarging of the expressive boundaries, or rather in the fiction that seems to revolutionize a system that has been controlled for so long (but in the end affirms only the ideology of design as a liberation from any utilitarian servitude, and for this reason it is reduced, tactically, to a "representation").
%, based on the total weight of the polymer component of a propy-lene elastomer having a heat of fusion of less than 70 J/g and an isotactic triad tacticity of 50 to 99% and optionally containing units derived from a diene, the polymeric component having a density of less than 0.9 g/[cm.sup.3] and (b) from 20 to 120 phr, preferably 30 to 100 phr, most preferably 40 to 90 phr based on the total weight of the polymer component of a reinforcing filler component; and (c) a peroxide curative.