Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

1.6K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
1.6K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.9K
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...
2.9K
Permeability of Concrete01:25

Permeability of Concrete

164
Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...
164
Polymers: Molecular Weight Distribution01:10

Polymers: Molecular Weight Distribution

3.5K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
3.5K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.8K
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...
2.8K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.5K
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...
2.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Size-Dependent Permittivity for Alumina Powders.

Nanomaterials (Basel, Switzerland)·2026
Same author

A side-coupled microwave applicator supporting azimuthally symmetric modes with metal stirrer for liquid-phase reactions.

The Review of scientific instruments·2026
Same author

Rotary microwave applicator for rapid drying and uniform heating.

The Review of scientific instruments·2025
Same author

Stabilization of polyacrylonitrile-based fiber with a quasi-traveling microwave applicator.

Scientific reports·2024
Same author

High-directivity and compact microstrip coupler for RF power applications.

The Review of scientific instruments·2023
Same author

Characterizing the dielectric properties of carbon fiber at different processing stages.

Scientific reports·2021

Related Experiment Video

Updated: Jul 15, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
06:34

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

5.9K

Percolation Effect on the Complex Permittivities of Polymer Blends.

Hsien-Wen Chao1, Yun-Yu Lai2, Tsun-Hsu Chang1

  • 1Department of Physics, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu 300044, Taiwan.

Polymers
|September 28, 2023
PubMed
Summary

This study measures complex permittivities of polymer blends using field enhancement method (FEM). A percolation effect was observed, significantly increasing dielectric constants and loss tangents with higher solute concentrations.

Keywords:
complex permittivitycontour mapping methodenhanced field methodpercolation effectpolymer blends

More Related Videos

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles
09:27

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Published on: August 16, 2012

10.8K
Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K

Related Experiment Videos

Last Updated: Jul 15, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
06:34

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

5.9K
Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles
09:27

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Published on: August 16, 2012

10.8K
Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

7.9K

Area of Science:

  • Materials Science
  • Dielectric Spectroscopy
  • Polymer Physics

Background:

  • Understanding the dielectric properties of polymer blends is crucial for their application in various electronic and electrical devices.
  • The field enhancement method (FEM) offers a sensitive technique for characterizing the complex permittivity of materials.
  • Polymer blends, especially those involving solvent-solute mixtures, can exhibit complex dielectric behaviors influenced by concentration and phase transitions.

Purpose of the Study:

  • To measure and analyze the complex permittivities of polymer blends, specifically DC-840, MCL-805, and MCL-Siloxane, using the field enhancement method (FEM).
  • To investigate the influence of solute concentration on the dielectric constant and loss tangents of polymer blends.
  • To elucidate the observed percolation phenomenon and its correlation with blend viscosity using effective medium theories and dielectric models.

Main Methods:

  • Utilized the field enhancement method (FEM) by placing polymer blend samples in a Teflon holder within the FEM cavity.
  • Determined complex permittivity by measuring the resonant frequency and quality factor of the FEM cavity coupled with the samples.
  • Employed effective medium theories, high-frequency structure simulator (HFSS), generalized dielectric constant, and the Debye model to analyze experimental data.

Main Results:

  • The complex permittivities of DC-840, MCL-805, and MCL-Siloxane blends were successfully extracted.
  • A significant increase in dielectric constants and loss tangents was observed in DC-840/xylene blends above a critical solute volume fraction, indicating a percolation effect.
  • The percolation phenomenon was found to strongly correlate with the viscosity of the polymer blends.

Conclusions:

  • The field enhancement method (FEM) is effective for characterizing the dielectric properties of polymer blends.
  • Percolation significantly impacts the dielectric behavior of polymer blends, particularly at higher solute concentrations.
  • The generalized dielectric constant and Debye model provide valuable frameworks for explaining the observed percolation effects on dielectric properties.