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Related Concept Videos

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

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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Olefin Metathesis Polymerization: Overview01:13

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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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Related Experiment Video

Updated: Jun 12, 2025

Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices
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Retrofitting PMMA with a Thermal Trigger for Efficient Depolymerization.

Rhys W Hughes1, Tanmoy Maity1, Timothée Sergent1

  • 1George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida, Gainesville, Florida 32611, United States.

Journal of the American Chemical Society
|June 3, 2025
PubMed
Summary
This summary is machine-generated.

This study presents a new method for efficiently depolymerizing poly(methyl methacrylate) (PMMA) using a thermally sensitive trigger. This approach offers a sustainable solution for recycling PMMA waste.

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Area of Science:

  • Polymer Chemistry
  • Sustainable Materials Science
  • Chemical Engineering

Background:

  • Poly(methyl methacrylate) (PMMA) is a widely used plastic with significant waste generation.
  • Current PMMA recycling methods are often energy-intensive or inefficient.
  • Developing closed-loop depolymerization methods is crucial for a sustainable polymer economy.

Purpose of the Study:

  • To develop an efficient closed-loop bulk depolymerization method for PMMA.
  • To incorporate a thermally sensitive trigger for lower-temperature depolymerization.
  • To demonstrate the applicability of the method to commercial PMMA and polymer networks.

Main Methods:

  • Acid hydrolysis (<10%) of PMMA.
  • Esterification with N-hydroxyphthalimide to introduce a thermally sensitive trigger.
  • Bulk depolymerization of PMMA homopolymers and commercial PMMA.
  • Application to create depolymerizable polymer networks.

Main Results:

  • Successful depolymerization of model PMMA homopolymers (28–1140 kg/mol).
  • Achieved efficient bulk depolymerization (∼70%) of commercial PMMA (Mn = 439 kg/mol).
  • Demonstrated the generation of depolymerizable polymer networks using the developed method.

Conclusions:

  • The reported method enables efficient, lower-temperature depolymerization of PMMA.
  • This approach is effective for both model and commercial PMMA, indicating practical applicability.
  • The method shows potential for mitigating PMMA waste and advancing a circular polymer economy.