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Related Concept Videos

Polymers02:34

Polymers

40.7K
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...
40.7K
Polymers02:34

Polymers

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23.3K
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...
3.8K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.9K
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...
3.9K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

3.2K
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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Polymers: Defining Molecular Weight01:01

Polymers: Defining Molecular Weight

3.8K
Unlike small molecules with definite molecular weights, polymers are a mixture of individual polymer chains of varying lengths, each with a unique molecular weight.  So, the molecular weight of a polymer is expressed as an average value based on the average size of the polymer chains. The two most common forms of averages used for polymers are the number average molecular weight and weight average molecular weight.
The number average molecular weight (Mn) is the summation of the number...
3.8K

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Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
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Facet-modulated ferroelectric polymers.

Bo Cai1,2, Zhi-Ling Hou3, Yuan-Yuan Qi1,2

  • 1School of Chemistry, Beihang University, Beijing, China.

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|January 27, 2026
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Summary
This summary is machine-generated.

Researchers developed stable ferroelectric polymers by engineering atomic-scale interactions. This breakthrough enhances electromagnetic functional materials with broadband polarization properties and high dissipation efficiency.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Electromagnetism

Background:

  • Ferroelectric materials offer significant potential for various applications due to their spontaneous polarization.
  • Practical use of ferroelectric polymers is limited by challenges in atomic-scale control and polar phase stability.

Purpose of the Study:

  • To develop a method for fortifying the ferroelectric polyvinylidene fluoride phase.
  • To achieve stable ferroelectric polymers through atomic-scale engineering of interfacial interactions.

Main Methods:

  • Facet modulation to engineer interactions between inorganic crystal facets and organic polymer chains.
  • Construction of composite ferroelectric polymer systems.

Main Results:

  • Achieved stable ferroelectric polymers with facet-induced stabilization.
  • Demonstrated broadband polarization characteristics from megahertz to terahertz frequencies.
  • Maintained high dissipation efficiency (>99.9%) while mitigating the loss-bandwidth trade-off.

Conclusions:

  • Facet modulation is a breakthrough for creating stable ferroelectric polymers.
  • The developed composite systems offer high-performance electromagnetic functional materials.
  • Provides insights for advancing ferroelectric polymer technology.