DOI: 10.48436/bhtgv-mf953
title: Research data for "Trioxanes as photodegradable motifs for additive manufacturing"

description: Context and methodology

This dataset was collected during a research project on photopolymers for 3D printing within the framework of a PhD thesis at the Institute of Applied Technology, TU Wien. It entails the synthesis of monomers and thereof derived polymer network containing trioxanes as degradable motif via (photo)acid, and full characterization thereof. Production of the network via 3D printing and its degradation are phototriggered, semi-orthogonal processes. The data is further discussed in the publication cited below.

 

Technical details

The dataset entails the raw data of various analyses collected in an Excel file "Data trioxane paper":

Each tab in the file has the following structure:Line 1: Analysis methodLine 2: Parameters tracked by the analysis methodLine 3: Units of these parametersLine 4: Compound analyzed

Tab 1: "Figure 1": Absorption data of photoinitiators TPO-L and PAGTab 2: "Figure 2": Nuclear magnetic resonance (NMR) data of trioxane degradation compared to model compoundsTab 3: "Figure 3": Photo-dynamic scanning calorimetry (Photo-DSC) and photorheology data (irradiation with LED light source) of N-PAG and L-PAGTab 4: "Figure 4": Dynamic scanning calorimetry (DSC) of N-PAG, L-PAG, A-PAG, reference aldehyde and trioxane and NMR data of molten A-PAG sample compared toreference aldehyde.Tab 5: "Figure 5": Tensile testing and dynamic mechanical analysis (DMTA) data of N-PAG and L-PAGTab 6: "Figure S1": NMR data of trioxaneTab 7: "Figure S2": NMR data of reference aldehydeTab 8: "Figure S3": Photorheology data (irradiation with LED light source) of N-PAG and L-PAGTab 9: "Figure S4": ATR-IR data of trioxane and 10-undecanalTab 10: "Figure S5": DMTA and ATR-IR data of L-PAG formulation (uncured), L-PAG material (cured in Lumamat), A-PAG material directly after UV irradiation (after Uvitron) or after UV irradiation and subsequent DMTA measurement (after DMTA, polymeric/liquid part)Tab 11: "Figure S6": ATR-IR data of aged (110 days) L-PAG material compared to fresh and aged A-PAG and reference aldehyde

The compound abbreviations/descriptions in the Excel file are described in the following:

Small molecules:TPO-L: Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate (radical photoinitiator)PAG: photoacid generator UVI6976 (mixture of triarylsulfonium hexafluoroantimonate salts in propylene carbonate)trioxane: trioxane-containing triene utilized as crosslinker (1,3,5-trioxane-2,4,6-tris(9-decenyl))trixoane+PAG: trioxane-containing triene utilized as crosslinker mixed with PAG, not irradiatedtrioxane+PAG+UV: trioxane-containing triene utilized as crosslinker mixed with PAG, irradiated with ultraviolet (UV) light (Uvitron International INTELLIRAY 600 UV-oven; 320-500 nm Hg broadband UV lamp; 600 W; UV-A: 125 mW cm-2; vis: 125 mW cm-2, 300 s on both sides at 100% intensity)10-undecanal: reference compound for the small molecule degradation studyreference aldehyde: model compound for trioxane degradation product for the material degradation studyCHTT: trithiol comonomer (1,2,4-cyclohexanetriethanethiol)

Materials:All materials consist of a thiol-ene network consisting of equimolar amounts of trioxane and CHTT photopolymerized by TPO-L (1 wt%) and BHT (0.2 wt%). Inclusion of the PAG UVI6976 (1 wt%) in the network and its irradiation condition is indicated in the following material abbreviations:N-PAG = No PAG: PAG was not added to the formulation/materialL-PAG = inactive PAG: Formulation/material contains PAG but was not UV irradiated with the UV-ovenA-PAG: Material contains PAG, which was activated by UV irradiation in the UV-oven as described above

NMR data included in the Excel file has additionally been added as raw data files (Bruker) in the folder "NMR data", which can be opened with community-standard programmes (e.g. MestRe Nova, TopSpin).