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Related Concept Videos

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

Free-Radical Chain Reaction and Polymerization of Alkenes

8.2K
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.
8.2K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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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...
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Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.5K
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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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

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Advancements in Catalytic Depolymerization Technologies.

Goldie Oza1, Fabrizio Olivito2, Apurva Rohokale1

  • 1Centro de Investigation y Desarollo Tecnologico en Electroquimica Parque Tecnológico Querétaro, Queretaro CP 76703, Mexico.

Polymers
|June 27, 2025
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Summary
This summary is machine-generated.

This review explores catalytic depolymerization methods for renewable and synthetic polymers. Recovered monomers can be reused, advancing a circular economy through sustainable chemical production.

Keywords:
catalysiscircular economypolymerssustainable chemistry

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Area of Science:

  • Polymer Chemistry
  • Catalysis
  • Sustainable Materials

Background:

  • Rising raw material costs and market demand drive interest in sustainable chemical sources.
  • Polymer chemistry enables recycling by recovering original monomeric units.
  • Catalytic depolymerization is key for breaking down polymers into valuable chemical building blocks.

Purpose of the Study:

  • To review recent advancements in catalytic depolymerization techniques.
  • To cover methods for both natural (cellulose, lignin) and synthetic (plastics) polymers.
  • To highlight innovative methodologies in the field.

Main Methods:

  • Literature review of catalytic depolymerization strategies.
  • Focus on non-destructive techniques for monomer recovery.
  • Categorization of methods for cellulose, lignin, and plastics.

Main Results:

  • Successful catalytic depolymerization of various polymers.
  • Recovery of monomers for reintegration into production cycles.
  • Demonstration of potential for a circular economy.

Conclusions:

  • Catalytic depolymerization offers a sustainable route for polymer recycling.
  • Recovered materials support the transition to a circular economy.
  • Continued research in innovative methodologies is crucial.