Magnetic resonance insights into the heterogeneous, fractal-like kinetics of chemically recyclable polymers

Fricke, Sophia N.; Haber, Shira; Hua, Mutian; Salgado, Mia; Helms, Brett A.; Reimer, Jeffrey A.

doi:10.1126/sciadv.adl0568

Magnetic resonance insights into the heterogeneous, fractal-like kinetics of chemically recyclable polymers

Journal Article · Wed Apr 03 00:00:00 EDT 2024 · Science Advances

DOI:https://doi.org/10.1126/sciadv.adl0568· OSTI ID:2448501

^[1]; ^[2]; ^[2]; Salgado, Mia ^[1]; ^[2]; ^[3]

Univ. of California, Berkeley, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Moving toward a circular plastics economy is a vital aspect of global resource management. Chemical recycling of plastics ensures that high-value monomers can be recovered from depolymerized plastic waste, thus enabling circular manufacturing. However, to increase chemical recycling throughput in materials recovery facilities, the present understanding of polymer transport, diffusion, swelling, and heterogeneous deconstruction kinetics must be systematized to allow industrial-scale process design, spanning molecular to macroscopic regimes. To develop a framework for designing depolymerization processes, we examined acidolysis of circular polydiketoenamine elastomers. We used magnetic resonance to monitor spatially resolved observables in situ and then evaluated these data with a fractal method that treats nonlinear depolymerization kinetics. This approach delineated the roles played by network architecture and reaction medium on depolymerization outcomes, yielding parameters that facilitate comparisons between bulk processes. These streamlined methods to investigate polymer hydrolysis kinetics portend a general strategy for implementing chemical recycling on an industrial scale.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2448501

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 14 Vol. 10; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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