Anionic polymerization is a type of chain-growth polymerization where the active center of the polymer chain is a negatively charged ion, allowing for precise control over molecular weight and polymer architecture. This method is particularly useful for synthesizing polymers with narrow molecular weight distributions and well-defined structures, as it proceeds without termination under ideal conditions.

Anionic Polymerization

Anionic polymerization

Chain-growth polymerization is a polymerization mechanism where monomer molecules add to the active site of a growing polymer chain one at a time. This process typically involves initiation, propagation, and termination steps, allowing for rapid polymer chain growth and high molecular weight polymers.

chain-growth polymerization

active center

negatively charged ion

Molecular weight, also known as molecular mass, is the sum of the atomic masses of all atoms in a molecule, typically expressed in unified atomic mass units (u). It is crucial for calculating the stoichiometry of chemical reactions and determining the properties of substances in various scientific and industrial applications.

molecular weight

Polymer architecture refers to the spatial arrangement of monomer units within a polymer, influencing its physical properties, functionality, and application. Different architectures, such as linear, branched, cross-linked, or networked structures, can drastically alter a polymer's mechanical strength, thermal stability, and chemical resistance.

polymer architecture

narrow molecular weight distributions

well-defined structures

Termination refers to the conclusion or ending of a process, contract, or employment, often involving legal and procedural considerations. It is crucial to manage termination carefully to minimize risks and ensure compliance with relevant laws and regulations.

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