{
  "abstract": "The early-stage dimer formation of 1,3-benzoxazine (PH-a) was investigated as a diagnostic system for understanding the ring-opening polymerization (ROP) mechanism using a coupled FAIMS-IRMPD-MS/MS platform. High-field asymmetric waveform ion mobility spectrometry (FAIMS) resolved the protonated PH-a dimer into three distinct populations. A series of methyl-blocked benzoxazine derivatives was used to systematically eliminate individual reactive sites and assign each FAIMS population to a specific reaction route via tandem MS fragmentation patterns and IRMPD action spectroscopy, supported by theoretical vibrational spectra obtained by DFT calculations. Four dimer formation pathways were confirmed: phenolic aromatic substitution at the ortho and para positions, and arylamine aromatic substitution at the ortho and para positions of the aniline ring. Phenoxy- and nitrogen-mediated attack routes were not observed. Each pathway yields dimers in either a closed-ring (CRB) or open-ring (ROP) form, a structural duality with direct implications for the crosslinking topology and network heterogeneity of the resulting polybenzoxazine.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Rayan C. Gomes"
    },
    {
      "name": "Francisco W. M. Ribeiro"
    },
    {
      "name": "Thiago C. Correra",
      "orcid": "0000-0002-8422-8701"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5zpyfhgmymffm.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010146/v1",
  "fulltext_url": null,
  "id": "5zpyfhgmymffm",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010146/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1607|Mass Spectrometry Techniques and Applications"
    ]
  ],
  "openalex": "W7221134988",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010146/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/5zpyfhgmymffm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15010146",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010146/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1607|Mass Spectrometry Techniques and Applications",
      "subfield": "physical"
    }
  ],
  "title": "Probing Benzoxazine Dimer Formation Using Methyl-Blocked Derivatives as Mechanistic Probes",
  "title_text": "Probing Benzoxazine Dimer Formation Using Methyl-Blocked Derivatives as Mechanistic Probes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/5zpyfhgmymffm",
  "venue": "ChemRxiv",
  "versions": []
}