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Related Concept Videos

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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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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Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

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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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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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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.7K
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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Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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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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Related Experiment Video

Updated: Mar 8, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Solid Polymer Electrolytes with Excellent High-Temperature Properties Based on Brush Block Copolymers Having Rigid

Jing Ping1, Hongbing Pan1, Ping Ping Hou1

  • 1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, and College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.

ACS Applied Materials & Interfaces
|January 28, 2017
PubMed
Summary

Brush block copolymers with rigid and flexible side chains self-assemble into ordered lamellar structures upon lithium salt doping. These materials exhibit high ionic conductivity, making them suitable for high-temperature lithium-ion batteries.

Keywords:
brush block copolymerhigh temperatureionic conductivitylamellar structurerigid side chain

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Electrochemistry

Background:

  • Brush block copolymers (BBCPs) are complex macromolecules with potential applications in nanotechnology.
  • Polynorbornene-based BBCPs offer tunable properties through side chain engineering.
  • Developing novel polymer electrolytes is crucial for advanced battery technologies.

Purpose of the Study:

  • To synthesize and characterize BBCPs with varying rigid and flexible side chains.
  • To investigate the self-assembly behavior of these BBCPs upon lithium salt doping.
  • To evaluate the ionic conductivity of the resulting polymer electrolytes for high-temperature applications.

Main Methods:

  • Tandem ring-opening metathesis polymerization for BBCP synthesis.
  • Small-angle X-ray scattering (SAXS) for analyzing bulk self-assembly and nanostructure formation.
  • Ionic conductivity measurements across a temperature range (40-200 °C).

Main Results:

  • BBCPs synthesized with poly{2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene} (PMPCS) and poly(ethylene oxide) (PEO) side chains.
  • Neat BBCPs did not form ordered nanostructures; however, lithium salt doping induced lamellar (LAM) structures.
  • The most ordered LAM structures were observed when the degrees of polymerization of PEO and PMPCS side chains were similar.
  • Ionic conductivity followed the Vogel-Tamman-Fulcher (VTF) equation, reaching 1.58 × 10⁻³ S/cm at 200 °C.

Conclusions:

  • Lithium salt doping is effective in inducing ordered LAM self-assembly in specific BBCPs.
  • The ordered LAM structures are crucial for achieving high ionic conductivity.
  • These PEO-based polymer electrolytes demonstrate promising performance for high-temperature lithium-ion batteries.