Additive Manufacturing of Degradable Materials via Ring-Opening Metathesis Polymerization (ROMP).

Area of Science:

• Polymer Chemistry
• Materials Science
• Additive Manufacturing

Background:

• Thermoset polymers, such as polydicyclopentadiene (PDCPD), offer superior thermal and mechanical properties essential for high-performance applications.
• A significant drawback of thermosets is their inherent resistance to degradation, leading to environmental persistence.
• There is a growing need for advanced materials that combine high performance with controlled degradability.

Purpose of the Study:

• To introduce degradability into an industrially relevant thermoset material, polydicyclopentadiene (PDCPD).
• To demonstrate the feasibility of creating degradable thermosets using additive manufacturing (AM) techniques.
• To explore the potential of photochemical methods and ring-opening metathesis polymerization (ROMP) for designing degradable advanced materials.

Main Methods:

• Utilized a photochemical approach to incorporate 2,3-dihydrofuran (DHF) linkages into PDCPD during additive manufacturing.
• Investigated the degradation behavior of the AM-produced PDCPD objects.
• Employed acid treatment to induce degradation of the modified thermoset materials.

Main Results:

• Successfully additively manufactured PDCPD objects containing degradable DHF linkages.
• Demonstrated that acid treatment rapidly degrades the manufactured objects into soluble byproducts.
• Established a novel method for creating degradable thermoset materials via photochemical ROMP.

Conclusions:

• The study presents the first instance of creating additively manufactured, degradable PDCPD using photochemical methods.
• The incorporation of DHF linkages enables controlled degradation of thermoset materials upon acid treatment.
• This research opens new avenues for developing sustainable, high-performance plastics through advanced manufacturing and polymer chemistry.