{
  "abstract": "Photoresponsive polymer networks that reversibly modulate their mechanical properties under light irradiation are promising materials for advanced actuators and shape-memory systems. Herein, we report the synthesis of a new family of hexaarylbiimidazole (HABI)-carbamate-siloxane hybrid polymer networks containing methyl, phenyl, vinyl, acrylate, methacrylate, and isooctyl organotrialkoxysilane structures. The polymers were prepared through simultaneous urethane formation and siloxane condensation. We characterized all synthesized compounds by ATR-FTIR, 1H NMR, 13C NMR, solid-state 13C NMR, 29Si NMR, LC-HRMS, UV−Vis spectroscopy, thermogravimetric analysis, and dynamic mechanical analysis. Chemical characterization confirmed successful incorporation of HABI moieties, formation of carbamate linkages, and cross-linked siloxane networks. The organotrialkoxysilane substituents significantly influenced the thermal and mechanical properties of the polymer networks. Methacrylate- and acrylate-containing polymers showed the highest thermal stability (Td5% = 237 °C and 207 °C, respectively), while ceramic yields increased from 7% for the pristine network to 15%- 19% for the modified systems. Dynamic mechanical analysis revealed pronounced, reversible light-induced changes in storage and loss moduli arising from reversible HABI C−N bond cleavage and recombination, with the vinyl-containing polymer exhibiting the largest storage modulus variation (8 × 103 MPa). Several polymers also demonstrated reproducible light-assisted shape-memory behavior, with the acrylate-, methacrylate-, methyl-, and isooctyl-containing systems showing the most distinct responses. These HABI-carbamate-siloxane hybrid networks provide a versatile platform for developing mechanically tunable, photoresponsive materials for smart polymer and shape-memory applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Mehdi Erfani Jazi"
    },
    {
      "name": "Ethan T. Chandler"
    },
    {
      "name": "Fatemeh Aghabozorgi"
    },
    {
      "name": "Buddhima Rupasinghe"
    },
    {
      "name": "Joseph C. Furgal",
      "orcid": "0000-0002-7040-0793"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bnjq1cyx9d1ze.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009851/v1",
  "fulltext_url": null,
  "id": "bnjq1cyx9d1ze",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009851/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",
      "2210|Advanced Materials and Mechanics"
    ]
  ],
  "openalex": "W7220438705",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009851/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/bnjq1cyx9d1ze.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15009851",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009851/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Photoresponsive Dynamics in HABI-Carbamate-Silsesquioxane Hybrid Polymer Networks with Tunable Thermomechanical Properties and Shape-Memory Behaviors",
  "title_text": "Photoresponsive Dynamics in HABI-Carbamate-Silsesquioxane Hybrid Polymer Networks with Tunable Thermomechanical Properties and Shape-Memory Behaviors",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/bnjq1cyx9d1ze",
  "venue": "ChemRxiv",
  "versions": []
}