Controlled patterning of crystalline domains by frontal polymerization

Justine E. Paul, Yuan Gao, Yoo Kyung Go, Luis E. Rodriguez Koett, Anisha Sharma, Manxin Chen, Jacob J. Lessard, Tolga Topkaya, Cecilia Leal, Jeffrey S. Moore, Philippe H. Geubelle and Nancy R. Sottos ()
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Justine E. Paul: University of Illinois at Urbana–Champaign
Yuan Gao: University of Illinois at Urbana–Champaign
Yoo Kyung Go: University of Illinois at Urbana–Champaign
Luis E. Rodriguez Koett: University of Illinois at Urbana–Champaign
Anisha Sharma: University of Illinois at Urbana–Champaign
Manxin Chen: University of Illinois at Urbana–Champaign
Jacob J. Lessard: University of Illinois at Urbana–Champaign
Tolga Topkaya: University of Illinois at Urbana–Champaign
Cecilia Leal: University of Illinois at Urbana–Champaign
Jeffrey S. Moore: University of Illinois at Urbana–Champaign
Philippe H. Geubelle: University of Illinois at Urbana–Champaign
Nancy R. Sottos: University of Illinois at Urbana–Champaign

Nature, 2024, vol. 634, issue 8032, 85-90

Abstract: Abstract Materials with hierarchical architectures that combine soft and hard material domains with coalesced interfaces possess superior properties compared with their homogeneous counterparts1–4. These architectures in synthetic materials have been achieved through deterministic manufacturing strategies such as 3D printing, which require an a priori design and active intervention throughout the process to achieve architectures spanning multiple length scales5–9. Here we harness frontal polymerization spin mode dynamics to autonomously fabricate patterned crystalline domains in poly(cyclooctadiene) with multiscale organization. This rapid, dissipative processing method leads to the formation of amorphous and semi-crystalline domains emerging from the internal interfaces generated between the solid polymer and the propagating cure front. The size, spacing and arrangement of the domains are controlled by the interplay between the reaction kinetics, thermochemistry and boundary conditions. Small perturbations in the fabrication conditions reproducibly lead to remarkable changes in the patterned microstructure and the resulting strength, elastic modulus and toughness of the polymer. This ability to control mechanical properties and performance solely through the initial conditions and the mode of front propagation represents a marked advancement in the design and manufacturing of advanced multiscale materials.

Date: 2024
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DOI: 10.1038/s41586-024-07951-7

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