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Related Concept Videos

Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
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...

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Updated: May 31, 2026

3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization
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3D Printing and In Situ Surface Modification via Type I Photoinitiated Reversible Addition-Fragmentation Chain Transfer Polymerization

Published on: February 18, 2022

Self-organizing surface-initiated polymerization: facile access to complex functional systems.

Naomi Sakai1, Marco Lista, Oksana Kel

  • 1Department of Organic Chemistry, University of Geneva, Geneva 1211, Switzerland. naomi.sakai@unige.ch

Journal of the American Chemical Society
|June 18, 2011
PubMed
Summary
This summary is machine-generated.

We developed self-organizing surface-initiated polymerization (SOSIP) for easy creation of ordered, functional materials. This method yields high-quality polymer films with superior activity compared to disordered materials.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Science

Background:

  • Developing advanced functional materials requires controlled synthesis of complex systems.
  • Existing methods for creating ordered polymer structures on surfaces can be complex and time-consuming.

Purpose of the Study:

  • To introduce a user-friendly method for creating ordered and oriented functional polymer systems on transparent oxide surfaces.
  • To demonstrate the effectiveness of self-organizing surface-initiated polymerization (SOSIP) for synthesizing high-quality functional materials.

Main Methods:

  • Combining monomer self-organization with ring-opening disulfide exchange polymerization.
  • Utilizing transparent oxide surfaces as substrates for polymer growth.

Main Results:

  • SOSIP enables rapid synthesis of thick polymer films with smooth, reactivatable surfaces.
  • The method achieves long-range order with high precision and minimal defects.
  • Demonstrated creation of panchromatic photosystems with oriented four-component redox gradients.
  • SOSIP-generated architectures exhibit significantly higher activity than disordered controls.

Conclusions:

  • SOSIP is an efficient and versatile method for fabricating advanced functional materials.
  • The controlled, ordered structures produced by SOSIP lead to enhanced material performance.
  • This approach facilitates the development of next-generation functional materials.