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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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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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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Cationic Chain-Growth Polymerization: Mechanism00:57

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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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Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
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Polymers02:34

Polymers

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Multifunctional Ionic Polymers from Deep Eutectic Monomers Based on Polyphenols.

Jon López de Lacalle1, Antonela Gallastegui1, Jorge L Olmedo-Martínez1

  • 1POLYMAT University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain.

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|January 12, 2023
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Summary
This summary is machine-generated.

Researchers developed novel deep eutectic polymers from biobased polyphenols and ionic monomers. These versatile materials exhibit tunable properties, from strong adhesives to ultratough elastomers, with applications in 3D printing and antibacterial materials.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Sustainable Chemistry

Background:

  • Deep eutectic solvents (DES) offer tunable properties by combining hydrogen bond donors and acceptors.
  • Biobased polyphenols, rich in catechol and pyrogallol motifs, present opportunities for novel material design.
  • Ionic polymers provide a versatile platform for developing advanced functional materials.

Purpose of the Study:

  • To synthesize and characterize a new class of deep eutectic polymers (polyDES) using biobased polyphenols and (meth)acrylic ammonium salts.
  • To investigate the structure-property relationships, particularly focusing on adhesion and mechanical toughness.
  • To explore the functional properties, including metal complexation, antibacterial activity, and 3D printability.

Main Methods:

  • Synthesis of ionic monomers derived from (meth)acrylic acid and ammonium salts.
  • Incorporation of biobased polyphenols (catechol/pyrogallol derivatives) to form deep eutectic monomers and polymers.
  • Mechanical testing (adhesion, tensile strength, stretchability) and characterization of polymer properties.
  • Evaluation of metal complexation, antibacterial efficacy, and 3D printing performance.

Main Results:

  • Novel phenolic polymeric deep eutectic solvents (polyDES) were successfully synthesized.
  • Polymers derived from pyrogallol and hydrocaffeic acid demonstrated high adhesion (>1 MPa).
  • Tannic acid/gallic acid-based polymers exhibited exceptional toughness (≈1000% stretchability, ≈3 MPa strength).
  • The polyDES showed metal complexation, antibacterial activity, and rapid 3D printability.

Conclusions:

  • Phenolic chemistry enables precise control over ionic polymer properties, yielding materials with tunable adhesion and toughness.
  • The developed polyDES represent a sustainable and versatile class of materials with significant potential in various applications.
  • Fast processability via 3D printing opens avenues for additive manufacturing of complex structures with advanced functionalities.