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Related Concept Videos

Radical Chain-Growth Polymerization: Mechanism01:09

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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...
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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
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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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Radical Chain-Growth Polymerization: Chain Branching01:17

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The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
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Radical Autoxidation01:20

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The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
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Radical Reactivity: Overview01:11

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Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
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Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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Automation-Assisted Photoinduced Atom Transfer Radical Polymerization.

Cesar Ramirez1, Eman Ahmed1, Elena Di Mare1

  • 1Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States.

ACS Polymers Au
|February 16, 2026
PubMed
Summary
This summary is machine-generated.

Automated atom transfer radical polymerization (ATRP) is now possible in open labware, enabling high-throughput synthesis and optimization of tailored polymers. This advancement accelerates data-driven polymer chemistry development.

Keywords:
atom transfer radical polymerizationcombinatorialhigh-throughputmachine learningrobotics

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Area of Science:

  • Polymer Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Oxygen-tolerant reversible-deactivation radical polymerizations (RDRP) facilitate polymer synthesis in open labware.
  • Previous work automated photoinduced electron/energy transfer reversible addition-fragmentation chain transfer (PET-RAFT) and enzyme-assisted RAFT (Enz-RAFT).

Purpose of the Study:

  • Introduce and demonstrate automated atom transfer radical polymerization (ATRP) for high-throughput optimization.
  • Provide insights into selecting reaction components for challenging monomers like methyl methacrylate.
  • Facilitate data-driven optimization of ATRP reactions through high-throughput data generation.

Main Methods:

  • Developed an automated ATRP platform compatible with open labware.
  • Applied the platform to optimize ATRP chemistry, including ligand and initiator selection.
  • Created a Python package for experimental planning and automated liquid handling recipes.

Main Results:

  • Successfully demonstrated high-throughput optimization of ATRP.
  • Gained insights into optimizing the polymerization of methyl methacrylate.
  • Generated actionable recipes for manual or automated pipetting.

Conclusions:

  • Automated ATRP accelerates the development and optimization of tailored polymers.
  • This platform enables data-driven polymer synthesis and lowers the knowledge barrier.
  • The developed tools facilitate integration of robotics for high-throughput polymer applications.