{
  "abstract": "The development of non-isocyanate polyurethanes (NIPUs) has attracted increasing attention as a sustainable alternative to conventional polyurethane chemistry due to the elimination of toxic isocyanates while maintaining the versatility of segmented polymer architectures. In this work, a novel synthetic strategy for the preparation of segmented NIPUs was developed using epoxide chemistry. The soft and hard segment precursors were obtained by epoxidation from polytetramethylene ether glycol (PTMEG, M n = 2000 g mol⁻¹), polycaprolactone diol (PCD, M n = 2000 g mol⁻¹), and from a hydroxy-urethane derived from furfurylamine, respectively. Polymerization was carried out in two consecutive steps. Initially, the epoxidized soft- and hard-segment precursors were reacted with 1,6-hexamethylenediamine to form furan-terminated prepolymers containing secondary hydroxyl groups. Subsequently, chain extension was achieved through thermoreversible Diels-Alder coupling with bismaleimide, yielding segmented polyurethane networks. Synthesized NIPUs were characterized via FTIR, NMR, and MALDI-TOF MS, and their structure-property relationships were investigated using DSC, DMA, SEM, swelling, and tensile tests. Owing to the incorporation of thermoreversible Diels-Alder linkages, the prepared polymer networks also exhibited intrinsic self-healing capability. The proposed synthetic approach provides a straightforward and environmentally benign route toward segmented non-isocyanate polyurethanes offering broad opportunities for tailoring material performance through molecular design.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Applied Chemistry, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary keki.sandor@science.unideb.hu +36-52-512-900, ext. 22455.",
    "Department of Solid State Physics, University of Debrecen Bem tér 18/b H-4026 Debrecen Hungary."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Csilla Lakatos"
    },
    {
      "affs": [
        0
      ],
      "name": "Katalin Czifrák"
    },
    {
      "affs": [
        0
      ],
      "name": "Lajos Nagy"
    },
    {
      "affs": [
        1
      ],
      "name": "Csaba Cserháti",
      "orcid": "0000-0003-1312-4961"
    },
    {
      "affs": [
        0
      ],
      "name": "Sándor Kéki",
      "orcid": "0000-0002-5274-6117"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9n2827jq0vrtn.bib",
  "cited_by": 0,
  "doi": "10.1039/d6ra08436b",
  "fulltext_url": "https://europepmc.org/articles/PMC13686150",
  "id": "9n2827jq0vrtn",
  "issns": [
    "2046-2069"
  ],
  "landing_url": "https://europepmc.org/article/MED/42910042",
  "language": "eng",
  "licence": "CC-BY-NC",
  "licence_label": "CC BY-NC",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2507|Polymer composites and self-healing"
    ]
  ],
  "openalex": "W7223157566",
  "pdf_url": "https://europepmc.org/articles/PMC13686150?pdf=render",
  "pmcid": "PMC13686150",
  "pmid": "42910042",
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9n2827jq0vrtn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:10Z",
      "native_id": "MED:42910042",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42910042"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2507|Polymer composites and self-healing",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Segmented epoxy-based non-isocyanate polyurethanes with thermoreversible Diels-Alder junctions.",
  "title_text": "Segmented epoxy-based non-isocyanate polyurethanes with thermoreversible Diels-Alder junctions.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:10Z",
  "url": "https://research.draconitic.com/paper/9n2827jq0vrtn",
  "venue": "RSC advances",
  "versions": []
}