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Related Concept Videos

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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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...
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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: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

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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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Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

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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...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Polymers02:34

Polymers

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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...
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Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
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Controlling conjugated polymer morphology by precise oxygen position in single-ether side chains.

Pablo Durand1, Huiyan Zeng2, Badr Jismy1

  • 1Université de Strasbourg, CNRS, ICPEES UMR 7515, 67087 Strasbourg, France. olivier.bardagot@cnrs.fr.

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Novel single-ether side chains enhance conjugated polymer doping. Side chain structure controls crystallinity and improves conductivity, paving the way for advanced semiconducting polymers.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Organic Electronics

Background:

  • Polar side chains improve conjugated polymer doping by enhancing miscibility with dopants and ion uptake.
  • Tuning side chain structure is crucial for optimizing polymer properties.

Purpose of the Study:

  • Design and investigate novel semiconducting polymers with single-ether side chains.
  • Explore the effect of ether oxygen position on polymer crystallinity and properties.
  • Evaluate the potential for next-generation p- and n-type semiconducting polymers.

Main Methods:

  • Synthesis of polymers with systematically varied single-ether side chains.
  • Characterization using differential scanning calorimetry, fast scanning chip calorimetry, and X-ray scattering.
  • Assessment of electrical conductivity and thermoelectric properties in thin films.

Main Results:

  • Polymers with single-ether side chains exhibit controllable high crystallinity.
  • The degree of crystallinity is tunable by adjusting the ether oxygen's position along the side chain.
  • High thermomechanical properties, electrical conductivities, and thermoelectric power factors were achieved.

Conclusions:

  • Single-ether side chains offer a versatile strategy for designing high-performance semiconducting polymers.
  • Optimized side chain design leads to enhanced molecular order and charge transport.
  • These polymers show promise for advanced electronic and thermoelectric applications.