isotactic


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Related to isotactic: Syndiotactic

isotactic

[¦ī·sə¦tak·tik]
(organic chemistry)
Designating crystalline polymers in which substituents in the asymmetric carbon atoms have the same (rather than random) configuration in relation to the main chain.
References in periodicals archive ?
Isotactic polypropylene has an important position among commodity polymeric materials owing to its low manufacturing cost and rather versatile properties.
Mechanical Properties of Injection Molded Isotactic Polypropylene/Roselle Fiber Composites, J.
For both methylene regions, a relative fraction of the isotactic orientation can be observed.
Triphenylmethyl methacrylate (TrMA) is a unique monomer that forms an isotactic polymer, PTrMA, even by a radical process, (11) which usually yields atactic or syndiotactic polymers.
In contrast, an isotactic stereoblock (bottom) polymer has a higher melting point.
or isotactic configuration) are used to prepare adhesives of the present invention.
Joint Effects of Molecular Structure and Processing History on Specific Nucleation of Isotactic Polypropylene, Macromolecules, 42, 7413-7417, ISSN 0024-9297
PVC resins have what is called a linear isotactic structure, the chlorine is always on the same side of the carbon atom, causing crystallization within the PVC polymer.
The Russian researchers also explore thermo-mechanical destruction of polypropylene, polymer nanocomposite reinforcement, the fractal-like kinetics of the re-esterification reaction with a catalyst, and the structure and thermo-oxidation of polymer blends of isotactic polypropylene and triple ethylenepropylenediene.
First place winner Sangyeob Lee received a check for $1,000 and an engraved plaque for his award-winning paper "Argon- and Oxygen-Based Plasma Treatment Effects at the Thermomechanical Pulp Fiber and Isotactic Polypropylene Interface.
Hence, ordinary high-density polyethylene is typically used for gasoline and oil containers and isotactic polypropylene can be used for chemical beakers.