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Related Concept Videos

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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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...
1.9K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

7.8K
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.
7.8K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

2.6K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.5K
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...
3.5K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.3K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Updated: Jun 27, 2025

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Degradable polymers via olefin metathesis polymerization.

Hao Sun1, Yifei Liang1, Matthew P Thompson1

  • 1Department of Chemistry, International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208, USA.

Progress in Polymer Science
|April 26, 2024
PubMed
Summary
This summary is machine-generated.

Olefin metathesis polymerization offers a powerful new route to diverse degradable polymers. This versatile method enables the synthesis of novel materials with unique properties, expanding beyond traditional polymerization techniques.

Keywords:
Acyclic diene metathesis polymerizationCascade enyne metathesis polymerizationDegradable polymersRing-Opening metathesis polymerization

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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Synthesis

Background:

  • Degradable polymers are crucial for various applications, with traditional synthesis relying on methods like ring-opening polymerization.
  • Existing methods have limitations in the range of accessible degradable polymer structures and functionalities.

Purpose of the Study:

  • To review the application of olefin metathesis polymerization in creating degradable polymers.
  • To highlight the versatility and advantages of olefin metathesis over conventional polymerization techniques for degradable polymers.

Main Methods:

  • Discussion of acyclic diene metathesis polymerization.
  • Exploration of entropy-driven and enthalpy-driven ring-opening metathesis polymerization.
  • Analysis of cascade enyne metathesis polymerization strategies.

Main Results:

  • Olefin metathesis polymerization provides access to a broad spectrum of degradable polymers, including poly(ester), poly(amino acid), and poly(carbonate) among others.
  • The functional group tolerance of olefin metathesis allows for the incorporation of diverse degradable moieties.
  • Different metathesis strategies offer varying degrees of control and livingness in polymerization.

Conclusions:

  • Olefin metathesis polymerization is a powerful tool for synthesizing novel degradable polymers with unique structures and properties.
  • This approach expands the library of accessible degradable polyolefins, offering new possibilities for material design.
  • Further research into applications, challenges, and future perspectives of these degradable polymers is warranted.