anionic polymerization

anionic polymerization

[¦a‚nī¦än·ik pə‚lim·ə·rə′zā·shən]
(organic chemistry)
A type of polymerization in which Lewis bases, such as alkali metals and metallic alkyls, act as catalysts.
References in periodicals archive ?
Among the topics are fluorinated peroxides as initiators of fluorinated polymers, anionic polymerization fluorinated vinyl monomers, synthesizing fluoro-functional conjugated polymers by electrochemical methods, structure-property relations in semi-fluorinated polymethacrylates, and the melt viscosity properties of fluoroplastics: correlations to molecular structure and tailoring principles.
z]-P-Y-P-F, wherein S is sulfur, P is an elastomer polymer chain obtained by the anionic polymerization of a conjugated diene and, optionally, a vinyl aromatic compound in the presence of a diinitiator, Y is a dicarbanion group derived from the diinitiator, x is an integer greater than or equal to 1 independently for each [S.
His goal at KAUST has been to build a world-class Polymer Synthesis Laboratory that focuses mainly on the synthesis of novel homopolymers, copolymers and hybrids (polymers/polypeptides, polymers/CNT) with well-defined complex macromolecular architectures by anionic polymerization (AP) high vacuum techniques and combinations of AP with other polymerization methodologies.
In pseudo-first-order systems such as anionic polymerization and even radical polymerization, the concentration of propagating species is same all over the system.
Cast polyamide moldings are based on alkaline rapid polymerization in a mold involving anionic polymerization of lactams.
Polymers obtained through anionic polymerization of glycidol exhibit a relatively controlled and moderately narrow molecular-weight distribution with a controlled degree of branching.
Subsequent chapters offer detailed coverage of methods and recent advances in cobalt-mediated radical polymerization, and anionic polymerization, alkyne metathesis polymerization ADIMET and macrocyclization, for example.
According to the company, the high quality butyllithium is widely used as an initiator for anionic polymerization and as a base in organic, pharmaceutical or agrochemical syntheses.
Utilizing the route of anionic polymerization makes possible to prepare amino functional-terminated polysiloxane chains because the basic conditions will not affect the amine functionality.
Called Rotomolded Anionic Polymerization, or RAP, the process is claimed to offer cost savings relative to using standard nylon 6 resin.
The new facility features an analytical services instrument room and a polymer laboratory, adding anionic polymerization technology to Sartomer's list of capabilities.