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Related Concept Videos

Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into the...
Radical Chain-Growth Polymerization: Overview01:10

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Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...

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Nanostructured functional materials prepared by atom transfer radical polymerization.

Krzysztof Matyjaszewski1, Nicolay V Tsarevsky

  • 1Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA. km3b@andrew.cmu.edu

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Atom transfer radical polymerization (ATRP) enables precise synthesis of advanced polymers. This review highlights well-defined functional materials and their applications in nanotechnology.

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Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Atom transfer radical polymerization (ATRP) is a leading controlled/living radical polymerization (CRP) technique.
  • Its popularity stems from simplicity, broad applicability, and the ability to create complex polymer architectures.

Purpose of the Study:

  • To review the synthesis of well-defined advanced functional materials using ATRP.
  • To showcase the versatility of ATRP in creating polymers with controlled molecular weight, distribution, topology, composition, and functionality.

Main Methods:

  • Detailed synthesis of macromolecules with controlled properties.
  • Exploration of novel polymer architectures like stars, bottle brushes, block, and gradient copolymers.
  • Discussion of self-assembly into nanoscale morphologies.

Main Results:

  • Demonstration of precise macromolecular engineering via ATRP.
  • Creation of polymers with site-specific functionalities and advanced architectures.
  • Identification of emerging commercial applications for ATRP-synthesized materials.

Conclusions:

  • ATRP provides a powerful platform for developing nanostructured functional materials.
  • These materials offer new avenues for high-value applications in diverse fields.
  • Examples include thermoplastic elastomers, coatings, surfactants, dispersants, and optoelectronic/biomedical materials.