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

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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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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.
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

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Functional end groups for polymers prepared using ring-opening metathesis polymerization.

Stefan Hilf¹, Andreas F M Kilbinger

¹Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Germany.

Nature Chemistry

|March 8, 2011

Summary

This summary is machine-generated.

Precise polymer chain-end functionalization is key. This review details end-functionalization methods for ring-opening metathesis polymerization, offering a guide for selecting optimal strategies with various catalysts.

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Area of Science:

Polymer Chemistry
Organic Synthesis
Materials Science

Background:

Precise control over macromolecule chain-ends is crucial in polymer research.
Living polymerization techniques typically dictate end-functionalization strategies based on active species and reaction kinetics.
Ring-opening metathesis polymerization (ROMP) is highly functional-group-tolerant but offers limited inherent functionalization routes.

Purpose of the Study:

To review diverse end-functionalization methods developed for ROMP.
To adapt functionalization strategies to specific metathesis catalysts and complex functional groups.
To provide a practical guide for selecting appropriate functionalization approaches in ROMP.

Main Methods:

Overview of end-functionalization techniques for various ROMP catalyst generations.
Analysis of how catalyst reactivity schemes influence functionalization.
Discussion of methods tailored to different functional group complexities.

Main Results:

Compilation of established and novel end-functionalization methods for ROMP.
Categorization of methods based on catalyst type and functional group compatibility.
Identification of key factors influencing the choice of functionalization strategy.

Conclusions:

ROMP's functional-group tolerance necessitates specialized end-functionalization techniques.
A systematic approach to selecting methods is vital for successful polymer synthesis.
This review serves as a valuable resource for polymer chemists seeking to functionalize ROMP polymers.