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

Radical Autoxidation01:20

Radical Autoxidation

2.2K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.2K
Plasticizers01:31

Plasticizers

93
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
93
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

6.0K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
6.0K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.5K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.5K
Radical Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.5K
Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
2.5K
Radical Reactivity: Steric Effects01:10

Radical Reactivity: Steric Effects

1.9K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
1.9K

You might also read

Related Articles

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

Sort by
Same author

A Novel Role of Dexmedetomidine in the Modulation of Morphine Reward Memory via γ-Aminobutyric Acid Transporter-1.

Anesthesiology·2026
Same author

Tuning the viscoelasticity of sugar-silicone polymers using caramelization.

Chemical communications (Cambridge, England)·2026
Same author

Celecoxib pretreatment and nab-paclitaxel-associated acute pain syndrome in patients with breast cancer: a prospective, non-randomized controlled clinical study.

International journal of surgery (London, England)·2025
Same author

Strategies to Improve the Sustainability of Silicone Polymers.

Macromolecules·2025
Same author

Intraoperative radiotherapy: An alternative to whole-breast external beam radiotherapy in the management of highly selective breast cancer: A SEER database analysis.

Cancer medicine·2024
Same author

Early changes of microRNAs in blood one month after bariatric surgery.

Diabetology & metabolic syndrome·2024

Related Experiment Video

Updated: Jul 30, 2025

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

12.7K

Antioxidant Silicone Elastomers without Covalent Cross-Links.

Khaled Tamim1, Cody B Gale1, Kaitlyn E C Silverthorne1

  • 1Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada.

ACS Sustainable Chemistry & Engineering
|May 16, 2023
PubMed
Summary

New silicone elastomers offer improved sustainability through reprocessing and environmental breakdown. These materials incorporate natural antioxidants, enhancing their performance and reusability for a circular economy.

More Related Videos

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
07:02

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

Published on: August 25, 2016

13.8K
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

12.7K

Related Experiment Videos

Last Updated: Jul 30, 2025

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

12.7K
The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
07:02

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

Published on: August 25, 2016

13.8K
Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

12.7K

Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Sustainable Materials

Background:

  • Elastomers require enhanced sustainability via end-of-life breakdown and reusability.
  • Current elastomers often lack efficient reprocessing capabilities.

Purpose of the Study:

  • To develop silicone elastomers with both thermoplasticity (reprocessability) and inherent antioxidant activity.
  • To investigate the linkage of natural phenolic antioxidants to silicone polymers.

Main Methods:

  • Synthesized silicone elastomers by combining telechelic aminoalkylsilicones with natural phenolic antioxidants (catechol, pyrogallol, tannic acid).
  • Utilized ionic and hydrogen bonding interactions to link antioxidants to the polymer backbone.
  • Investigated the influence of the [ArOH]/[H2NR] ratio on mechanical properties and processability.

Main Results:

  • Successfully prepared silicone elastomers exhibiting both thermoplasticity and antioxidant properties.
  • Demonstrated that mechanical properties and processability are dependent on the antioxidant-to-silicone ratio.
  • Identified an optimal [ArOH]/[H2NR] ratio exceeding 1:1 for enhanced elastomer performance.

Conclusions:

  • The developed silicone elastomers offer a pathway to more sustainable materials through enhanced reusability and potential for controlled degradation.
  • The incorporation of natural phenolic antioxidants via ionic and H-bonding provides a versatile method for creating functional elastomers.
  • Material properties can be tuned by adjusting the ratio of incorporated antioxidants, enabling tailored performance for various applications.