{
  "abstract": "Conventional radical ultraviolet (UV) curing requires optically transparent substrates owing to the rapid termination of propagating radicals, limiting its use in opaque or geometrically complex assembly cases. We report a photoinduced redox initiation system for delayed-onset radical UV-curable adhesives combining a coumarin-based photobase generator (Cou-TMG) with dilauroyl peroxide (LP). Upon UV irradiation, Cou-TMG releases 1,1,3,3-tetramethylguanidine, which reacts with LP through a redox process that continuously generates radicals, sustaining polymerization after irradiation stops. Optimized photobase generator loading and irradiation dose provide an open time sufficient for substrate lamination (low C═C conversion immediately after UV irradiation) and endow substantial postpolymerization capability (higher C═C conversion after 1 h), contrasting conventional radical UV curing systems. The delayed-onset, radical UV-curable adhesives are applicable to various multifunctional acrylates. Specifically, trimethylolpropane triacrylate-based adhesives achieve a high lap-shear strength of 4.4 MPa on aluminum, and the present system further bonds Cu, Fe, polycarbonate, and glass substrates.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Pure and Applied Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba278-8510, Japan."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Naoya Machida"
    },
    {
      "affs": [
        0
      ],
      "name": "Ataru Daimon"
    },
    {
      "affs": [
        0
      ],
      "name": "Daisuke Aoki",
      "orcid": "0000-0002-0080-5314"
    },
    {
      "affs": [
        0
      ],
      "name": "Koji Arimitsu",
      "orcid": "0000-0002-3357-9704"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4z1w503k2f958.bib",
  "cited_by": 0,
  "doi": "10.1021/acsmacrolett.6c00416",
  "fulltext_url": "https://europepmc.org/articles/PMC13689913",
  "id": "4z1w503k2f958",
  "issns": [
    "2161-1653"
  ],
  "landing_url": "https://europepmc.org/article/MED/42899733",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1605|Photopolymerization techniques and applications"
    ]
  ],
  "openalex": "W7214641891",
  "pdf_url": "https://europepmc.org/articles/PMC13689913?pdf=render",
  "pmcid": "PMC13689913",
  "pmid": "42899733",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4z1w503k2f958.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:37Z",
      "native_id": "MED:42899733",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42899733"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1605|Photopolymerization techniques and applications",
      "subfield": "organic"
    }
  ],
  "title": "Photoinduced Redox Initiation System for Delayed-Onset Radical UV-Curable Adhesives on Opaque Substrates.",
  "title_text": "Photoinduced Redox Initiation System for Delayed-Onset Radical UV-Curable Adhesives on Opaque Substrates.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:37Z",
  "url": "https://research.draconitic.com/paper/4z1w503k2f958",
  "venue": "ACS macro letters",
  "versions": []
}