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Related Concept Videos

Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

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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...
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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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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,...
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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.3K
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...
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Related Experiment Video

Updated: Dec 24, 2025

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

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Surface zwitterionization on versatile hydrophobic interfaces via a combined copolymerization/self-assembling

Ying-Nien Chou1, Antoine Venault, Yu-Hsiang Wang

  • 1R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li, Taoyuan 320, Taiwan. avenault@cycu.edu.tw ychang@cycu.edu.tw.

Journal of Materials Chemistry. B
|April 8, 2020
PubMed
Summary
This summary is machine-generated.

A novel in situ self-assembling coating method overcomes solubility issues for amphiphilic zwitterionic polymers, enabling efficient antifouling coatings. This technique reduces protein and cell adhesion on various materials.

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Self-Assembly of Hybrid Lipid Membranes Doped with Hydrophobic Organic Molecules at the Water/Air Interface
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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Science

Background:

  • Amphiphilic zwitterionic copolymers face solubility challenges, limiting their use in antifouling coatings.
  • Existing methods for applying these polymers are often complex and inefficient.

Purpose of the Study:

  • To develop a novel, single-step method for synthesizing and coating amphiphilic zwitterionic polymers.
  • To address the solubility limitations of these polymers for enhanced antifouling applications.

Main Methods:

  • In situ self-assembling coating (ISC) method was employed.
  • A copolymer of styrene (ST) and sulfobetaine methacrylate (SBMA) was synthesized and coated simultaneously.
  • Optimization of concentration, molar ratio, and reaction time was performed.

Main Results:

  • The ISC method successfully coated poly(styrene-co-sulfobetaine methacrylate) (PS-PSBMA) onto substrate surfaces.
  • Achieved ultralow protein adsorption and reduced attachment of blood components and bacteria.
  • Demonstrated applicability to hydrophobic materials like polypropylene (PP), poly(dimethylsiloxane) (PDMS), and poly(tetrafluoroethylene) (PTFE).

Conclusions:

  • The ISC method provides a convenient and efficient approach for creating antifouling surfaces.
  • This technique resolves the solubility issues of amphiphilic zwitterionic copolymers.
  • The developed method holds promise for antifouling applications in complex biological environments.