{
  "abstract": "Polyurethane (PU) foams are widely used as thermosets and yet poorly recycled due to their generally cross-linked nature and to the difficulty to recover their isolated monomers from chemical recycling processes. A mechanochemical recycling process was demonstrated in three steps in an internal mixer; partial aminolysis, cross-linking and foaming. Partial aminolysis was successfully demonstrated using a cycloaliphatic diamine and yielded a melt-processable PU with gel content (GC) of 54.4 % using as low as 6 wt% of diamine from a pristine PU with 94.1 % GC. The material was then efficiently cross-linked by blending it with a blocked isocyanate based on 4.4’-methylenebis (phenyl isocyanate) at 100 °C then triggering its reactivity at 160 °C to yield a material with GC of 84.7 %. The blocked isocyanate unblocking kinetics were assessed using rheometry, and revealed a partial reactivity even at 100 °C. The mechanical properties of the cross-linked recycled PU exhibited significantly improved properties as a consequence of network reformation. Finally, the concomitant use of a chemical blowing agent with blocked isocyanate allowed to yield a cross-linked recycled PU foam as a final step of mechanical processing. The strong reactivity of the blocked isocyanate appeared to limit marginally the foaming. Finally, the cross-linking and foaming process was performed successfully in one-step in a single screw extruder. This study demonstrates the potential of mechanical and chemical hybrid processes as short-loop recycling processes for thermosets.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Morgane Pingret"
    },
    {
      "name": "Pascal Tiquet"
    },
    {
      "name": "Pierre Piluso"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8gn8d94rhrm8h.bib",
  "cited_by": 0,
  "doi": "10.1021/acssusresmgt.6c00057",
  "fulltext_url": null,
  "id": "8gn8d94rhrm8h",
  "issns": [
    "2837-1445"
  ],
  "landing_url": "https://cea.hal.science/cea-05759655v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.poly"
    ],
    [
      "openalex",
      "2507|Polymer Foaming and Composites"
    ]
  ],
  "openalex": "W7172383338",
  "pdf_url": "https://cea.hal.science/cea-05759655/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-04",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/8gn8d94rhrm8h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "cea-05759655",
      "source": "hal",
      "url": "https://cea.hal.science/cea-05759655v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.poly",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Soft foam polyurethane recycling and foaming in reactive extrusion using partial aminolysis and a latent cross-linking chemistry",
  "title_text": "Soft foam polyurethane recycling and foaming in reactive extrusion using partial aminolysis and a latent cross-linking chemistry",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:37Z",
  "url": "https://research.draconitic.com/paper/8gn8d94rhrm8h",
  "venue": "ACS Sustainable Resource Management",
  "versions": []
}