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Accounting for spatial variations during photopolymerization of 1,6-hexane-diol diacrylate in the presence of oxygen

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  • معلومة اضافية
    • الموضوع:
      2024
    • Collection:
      Universiteit van Amsterdam: Digital Academic Repository (UvA DARE)
    • نبذة مختصرة :
      A dynamic model is proposed for photopolymerization of 1,6-hexane-diol diacrylate (HDDA) with bifunctional initiator bis-acylphosphine oxide (BAPO) in the presence of oxygen. This partial-differential-equation model predicts time and spatially varying vinyl-group conversion as well as concentrations of monomer, initiator, oxygen, and seven types of radicals. Experiments to obtain diffusivities of oxygen, BAPO and HDDA are reported. Oxygen-related parameters are estimated using real-time Fourier-transform infrared (FTIR) conversion data. FTIR experiments were conducted using a range of film thicknesses (8 - 17 μm), BAPO levels (1 -4 wt %) and light intensities ( 200 - 6000 W /m 2 ). The model predicts qualitative trends. Conversion predictions for runs with high intensities (≥ 5000 W /m 2 ) and high BAPO (4 wt %) are accurate with a root-mean-squared error (RMSE) of 0.04. Larger RMSE (0.13) for runs with lower intensities and BAPO indicates that improved parameter estimates are required. Parameter estimates will be updated in future using a model that accounts for shrinkage during polymerization.
    • File Description:
      application/pdf
    • الرقم المعرف:
      10.1002/aic.18490
    • الدخول الالكتروني :
      https://dare.uva.nl/personal/pure/en/publications/accounting-for-spatial-variations-during-photopolymerization-of-16hexanediol-diacrylate-in-the-presence-of-oxygen(21fddaf5-f5e6-4a74-a2dd-61493f1b6e79).html
      https://doi.org/10.1002/aic.18490
      https://hdl.handle.net/11245.1/21fddaf5-f5e6-4a74-a2dd-61493f1b6e79
      https://pure.uva.nl/ws/files/195016809/Accounting_for_spatial_variations_during_photopolymerization_of_1_6-hexane-diol_diacrylate.pdf
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.2C644B2B