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

Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

290
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
290
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.7K
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...
2.7K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.4K
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...
2.4K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.4K
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...
3.4K
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K

You might also read

Related Articles

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

Sort by
Same author

The influence of water on the dynamics of alternating polymers P(C<sub>8</sub>EG<sub>4</sub>) and P(C<sub>4</sub>EG<sub>4</sub>) by broadband dielectric spectroscopy.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Author Correction: Bose-Einstein condensation of a two-magnon bound state in a spin-1 triangular lattice.

Nature materials·2026
Same author

Resolving liquid-to-glass transitions of water under soft nanoconfinement.

Nature communications·2026
Same author

Uncovering complex phonon interactions in Mg<sub>3</sub>Bi<sub>2-x</sub>Sb<sub>x</sub>: topology and avoided crossings.

Nature communications·2026
Same author

Cubane lanthanoid complexes with tridentate [O, PO, O] coordination using tris(5-<i>tert</i>-butyl-2-hydroxyphenyl)-phosphine oxide ligands: synthesis, characterisation, and magnetic behaviour.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Backbone Dynamics of Bottlebrush Polymers Studied by Neutron Scattering.

Macromolecules·2026
Same journal

Customizing Ionic Micelles by Dynamic Coassembly of Sequence-Defined Peptoid Block Copolymers.

Macromolecules·2026
Same journal

Investigating Polyethylene Solubility for Solvent-Based Recycling: Experiments and SAFT‑γ Mie Predictions.

Macromolecules·2026
Same journal

Molecular Dynamics Simulations of the Structural and Thermodynamic Properties of Poly(<i>l</i>‑lactic acid) in the Presence of Water.

Macromolecules·2026
Same journal

From Solvent-Mediated Micellization to Packing in a Face-Centered Cubic Structure of Poloxamers.

Macromolecules·2026
Same journal

Nonlocal Effect of Percolated Particle Networks on Viscoelasticity of Polymer-Filler Nanocomposites: A Mesoscale Simulation Study.

Macromolecules·2026
Same journal

Helicity of a confined bottlebrush ring polymer.

Macromolecules·2026
See all related articles

Related Experiment Video

Updated: Jun 24, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

21.7K

Position-Dependent Segmental Relaxation in Bottlebrush Polymers.

Karin J Bichler1, Bruno Jakobi1, Alice Klapproth2

  • 1Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States.

Macromolecules
|June 3, 2024
PubMed
Summary
This summary is machine-generated.

Segmental dynamics in poly(propylene oxide) (PPO) bottlebrush polymers were studied. Findings reveal gradual relaxation behavior in side chains, influenced by the grafting process.

More Related Videos

Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties
06:02

Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties

Published on: September 1, 2018

7.1K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

6.9K

Related Experiment Videos

Last Updated: Jun 24, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

21.7K
Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties
06:02

Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties

Published on: September 1, 2018

7.1K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

6.9K

Area of Science:

  • Polymer Science
  • Materials Science
  • Neutron Scattering

Background:

  • Bottlebrush polymers possess unique architectures with grafted side chains.
  • Understanding segmental dynamics is crucial for predicting polymer behavior and properties.
  • Poly(propylene oxide) (PPO) is a versatile polymer with applications in various fields.

Purpose of the Study:

  • To investigate the segmental dynamics of PPO side chains in bottlebrush polymers.
  • To determine if gradual relaxation behavior exists within these side chains.
  • To differentiate the relaxation dynamics of inner versus outer segments of the PPO side chains.

Main Methods:

  • Quasi-elastic neutron scattering (QENS) was employed to study segmental dynamics.
  • Specific labeling of PPO side chains using sequential polymerization of protonated and deuterated monomers.
  • Analysis of segmental relaxation times and time-dependent mean-square displacement.

Main Results:

  • A slowdown in segmental relaxation was observed due to the grafting process.
  • Both segmental relaxation time and mean-square displacement showed this slowdown.
  • The non-Gaussian parameter indicated a transition towards Gaussian behavior with increasing distance from the polymer backbone.

Conclusions:

  • Gradual relaxation behavior was confirmed within the PPO side chains of bottlebrush polymers.
  • The grafting process significantly influences the segmental dynamics across different regions of the side chains.
  • The findings provide insights into the structure-dynamics relationship in complex polymer architectures.