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Chemical Activation of Frontal Ring-Opening Metathesis Polymerization.
Anna C Cramblitt1, Justine E Paul1, Tyler C Price1
1Beckman Institute for Advanced Science and Technology, Department of Material Science and Engineering, Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States of America.
ACS Macro Letters
|August 5, 2025
Summary
Chemically activated frontal ring-opening metathesis polymerization (FROMP) uses concentrated initiators to start a self-propagating polymerization front. This method enables on-demand material production without external power, ideal for remote applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Chemical Engineering
Background:
- Traditional polymerization methods often require external energy sources for initiation and propagation.
- Controlling polymerization fronts is crucial for advanced material synthesis and manufacturing.
- Frontal polymerization offers advantages in speed and energy efficiency but requires precise control.
Purpose of the Study:
- To develop an innovative chemical activation method for frontal ring-opening metathesis polymerization (FROMP).
- To enable on-demand production of polymer and composite materials using self-generated thermal energy.
- To demonstrate control over initiation location, timing, and multipoint activation.
Main Methods:
- Local concentration of Grubbs-type initiators to create an exothermic activation site.
- Utilizing the generated thermal energy to propagate a polymerization front through the bulk resin.
- Controlling initiation by adjusting initiator reactivity, solvent properties, and the air-resin interface.
Main Results:
- Achieved accelerated exothermic polymerization at the localized activation site.
- Demonstrated successful propagation of the polymerization front even with reduced bulk initiator concentrations.
- Enabled controlled multipoint front activation through synchronized injection or differential initiator reactivity.
Conclusions:
- The developed chemical activation technique provides an accessible method for FROMP.
- This approach allows for on-demand material production using only reaction-generated heat.
- The method is suitable for remote or infrastructure-limited environments due to the absence of external power requirements.
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