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Related Concept Videos

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
Diels–Alder Reaction: Characteristics of Dienes01:29

Diels–Alder Reaction: Characteristics of Dienes

The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is more stable, the...
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.

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Updated: Jun 28, 2026

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

Diene Rubber Functionalization and Degradation for Improved Materials Circularity.

Melody C Johnson1, Allie Ahn1, Guoliang Liu1,2

  • 1Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.

Chemsuschem
|June 27, 2026
PubMed
Summary
This summary is machine-generated.

Sustainable diene rubbers utilize postpolymerization functionalization for controlled degradation and recycling. This approach enhances material performance and enables upcycling of waste rubber into valuable products.

Keywords:
circular economydegradationpostpolymerization functionalizationupcycling

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Sustainability

Background:

  • Diene rubbers contain carbon-carbon double bonds, enabling postpolymerization modifications like vulcanization.
  • Vulcanized rubber presents significant end-of-life sustainability challenges due to pollution from current disposal methods.
  • Research is actively seeking sustainable rubber alternatives and chemical waste management strategies.

Purpose of the Study:

  • To review recent advancements in the postpolymerization functionalization of diene rubbers.
  • To demonstrate how these chemical transformations can facilitate controlled degradation, recycling, and upcycling of rubber materials.
  • To emphasize strategies that use rubber chemistry to improve material performance and circularity.

Main Methods:

  • Review of recent literature on postpolymerization functionalization techniques for diene rubbers.
  • Analysis of chemical strategies enabling controlled degradation and material recovery.
  • Exploration of methods for upcycling waste rubber feedstocks into high-value products.

Main Results:

  • Postpolymerization functionalization offers pathways to overcome the sustainability challenges of diene rubbers.
  • These transformations can be tailored to enable controlled degradation and efficient recycling processes.
  • Leveraging rubber chemistry allows for the enhancement of material properties and the recovery of valuable components from waste.

Conclusions:

  • Postpolymerization functionalization is a key strategy for improving the sustainability of diene rubbers.
  • Chemical modifications can unlock new end-of-life options, including controlled degradation and upcycling.
  • This approach promotes a circular economy for rubber materials by enhancing performance and recovering value from waste.