Fully biobased UV-cured thiol-ene coatings

Pezzana, Lorenzo; Sangermano, Marco

doi:10.1016/j.porgcoat.2021.106295

Cited by 22 publications

(26 citation statements)

References 47 publications

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“…FTIR spectra of CB before and after modification have been presented in Figure 8. In pristine‐VCB, the peak at 1640 cm −1 , representing C═C, 20 after modification faded completely. In verification to XPS data, it finds a suitable justification to state thiol‐ene reaction as a reason to this 21 .…”

Section: Resultsmentioning

confidence: 99%

Controlled cationic curing of epoxy composites with photochemically modified silanol encapsulated carbon black

Atif

Hussain

Rani

et al. 2022

J of Applied Polymer Sci

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Epoxy resins have been an inspiration in adhesives and coatings, however, uneven photopolymerization kinetics result in wrinkled surface and filler segregation, causing aesthetic and mechanical damage. Hence a control over curing kinetics is required not only to dodge filler segregation but also to control composite surface smoothness. In this study, photochemical modification of carbon black with mercaptopropyltrimethoxysilane, has resulted in unique silanol dendrites exterior on carbon black. Kinetic investigation confirmed that Ea for cationic polymerization of modified CB composite is three folds less in comparison to neat matrix, and two folds less in comparison to unmodified CB composite. Silanol dendrites have contributed on epoxy curing kinetics, through activated monomer mechanism. Samples have been characterized through XPS, FTIR, SEM, TGA, DSC, Raman, and EDX.

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Section: Resultsmentioning

confidence: 99%

Controlled cationic curing of epoxy composites with photochemically modified silanol encapsulated carbon black

Atif

Hussain

Rani

et al. 2022

J of Applied Polymer Sci

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“…20 In recent years, thiol–ene click polymerization has been widely utilized to prepare bio-based thiol–ene networks. Compared with traditional polymerization, thiol–ene polymerization has advantages including high reaction rates, simple procedures and formation of uniformly cross-linked structures 21 which has attracted great attention in the fields of coatings, 22,23 optics, 24 electronic equipment, 25 3D printing, 26 and biomedical implants. 27 In addition, the properties of thiol–ene networks are tunable by selection of appropriate thiols.…”

Section: Introductionmentioning

confidence: 99%

Vanillin-derived α,ω-diene monomer for thermosets preparation via thiol–ene click polymerization

et al. 2023

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“…In our group we have deeply investigated the sustainability of UV-curable process by studying the reactivity of bio-based monomers towards both radical [ 30 , 31 ] and cationic [ 22 , 32 , 33 , 34 , 35 , 36 , 37 ] mechanism. We have also studied fossil-based photo-cured vitrimers, where we described a convenient approach for a locally controllable photoactivation of vitrimeric properties in a covalently crosslinked thiol-epoxy network, exploiting the UV-mediated release of a strong amidine base acting as an efficient transesterification catalyst [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Bio-Based UV-Cured Epoxy Vitrimer from Castor Oil

et al. 2023

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Vitrimers brought new properties in thermosets by allowing their reshaping, self-healing, reprocessing, and network rearrangement without changing structural integrity. In this study, epoxidized castor oil (ECO) was successfully used for the straightforward synthesis of a bio-based solvent-free vitrimer. The synthesis was based on a UV-curing process, which proceeded at low temperatures in the absence of any solvents, and within a short time. Real time Fourier-transformed infrared spectroscopy and photo-DSC were exploited to monitor the cationic photocurable process. The UV-cured polymer networks were able to efficiently undergo thermo-activated bond exchange reactions due to the presence of dibutyl phosphate as a transesterification catalyst. Mechanical properties, thermal resistance, glass transition temperature, and stress relaxation were investigated as a function of the amount of transesterification catalyst. Mechanical properties were determined by both DMTA and tensile tests. Glass transition temperature (Tg) was evaluated by DMTA. Thermal stability was assessed by thermogravimetric analysis, whilst vitrimeric properties were studied by stress relaxation experiments. Overall, the ECO-based vitrimer showed high thermal resistance (up to 200 °C) and good mechanical properties (elastic modulus of about 10 MPa) and can therefore be considered as a promising starting point for obtaining more sustainable vitrimers.

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Fully biobased UV-cured thiol-ene coatings

Cited by 22 publications

References 47 publications

Controlled cationic curing of epoxy composites with photochemically modified silanol encapsulated carbon black

Controlled cationic curing of epoxy composites with photochemically modified silanol encapsulated carbon black

Vanillin-derived α,ω-diene monomer for thermosets preparation via thiol–ene click polymerization

Sustainable Bio-Based UV-Cured Epoxy Vitrimer from Castor Oil

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