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Related Concept Videos

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.1K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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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: 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,...
2.2K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.6K
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...
3.6K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.1K
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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Unlocking Solid Polymer Electrolytes: Advancing Materials through Characterization-Driven Insights.

Alberto Alvarez-Fernandez1, Guiomar Hernández2, Jon Maiz1,3

  • 1Centro de Física de Materiales (CFM-MPC), CSIC-UPV/EHU, 20018 Donostia - San Sebastián, Spain.

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Summary
This summary is machine-generated.

Developing advanced solid polymer electrolytes (SPEs) is crucial for safer, high-performance batteries. Innovations in polymer design and characterization are key to overcoming limitations of current poly-(ethylene oxide) (PEO) based systems.

Keywords:
BatteriesIonic ConductivityScatteringSolid Polymer ElectrolytesSpectroscopy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid polymer electrolytes (SPEs) offer safety and stability advantages for next-generation batteries.
  • Conventional poly-(ethylene oxide) (PEO)-based SPEs suffer from low ionic conductivity and poor electrochemical stability.
  • Novel polymer matrices and advanced characterization are needed to improve SPE performance.

Purpose of the Study:

  • To review recent advancements in SPE design and materials.
  • To highlight innovative polymer matrices and synthetic strategies for SPEs.
  • To emphasize the importance of advanced characterization for understanding ion transport.

Main Methods:

  • Review of literature on SPE design and characterization.
  • Focus on alternative polymers like polytetrahydrofuran (PTHF) and poly-(trimethylene carbonate) (PTMC).
  • Examination of synthetic strategies: copolymerization, blending, and cross-linking.
  • Analysis of characterization techniques: scattering methods and spectroscopy.

Main Results:

  • Polymers like PTHF and PTMC show promise as alternatives to PEO.
  • Synthetic modifications can reduce crystallinity and enhance ionic conductivity.
  • Advanced scattering and spectroscopic techniques provide insights into ion-polymer dynamics.

Conclusions:

  • Integrating novel materials and synthesis with advanced characterization is essential for SPE development.
  • A roadmap for rational SPE design is proposed for future energy storage systems.
  • Overcoming PEO limitations requires a multi-faceted approach in materials and methods.