Hybrid organic–inorganic coatings based on thiol-ene systems

Sangermano, Marco; Colucci, Giovanna; Fragale, M.; Rizza, Giancarlo

doi:10.1016/j.reactfunctpolym.2009.05.008

Cited by 47 publications

(34 citation statements)

References 14 publications

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“…3). Indeed, as it is well described in the literature (Weng et al 2004;Acosta Ortiz et al 2008;Sangermano et al 2009a andSangermano et al 2009b), the use of a coupling agent in hybrid organic-inorganic systems avoids the macroscopic phase separation between the organic and the inorganic phase. Similar morphologies were also obtained for the UV-curable mixture containing 60 wt% TMOS solution prehydrolyzed for 24 h at room temperature (COT RMT60PDB).…”

Section: Morphology Of the Treated Fabricsmentioning

confidence: 95%

“…Dual-cure processes have been thoroughly described in the literature as an advantageous strategy for obtaining coatings with peculiar resistance to scratching, abrasion, heat and radiation and other improved mechanical, electrical and optical properties Malucelli et al 2005;Bayramoglu et al 2006;Sangermano et al 2007;Malucelli et al 2009;Sangermano et al 2009a andSangermano et al 2009b).…”

Section: Introductionmentioning

confidence: 99%

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Cotton fabrics treated with hybrid organic–inorganic coatings obtained through dual-cure processes

2011

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Cotton fabrics were treated with a hybrid organic-inorganic coating obtained through a dual-cure process, i.e. a photopolymerization reaction followed by a thermal treatment for promoting the formation of silica phases through a sol-gel process. To this aim, different amounts of a silica precursor were added to an acrylic UV-curable formulation in the presence of a suitable coupling agent. The thermo-mechanical properties of the treated fabrics were investigated and correlated to the composition and morphology of the hybrid organic-inorganic system. Furthermore, their flame retardancy and combustion behavior were evaluated by flammability tests and cone calorimetry and compared with the performances of pure cotton.

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Section: Morphology Of the Treated Fabricsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Cotton fabrics treated with hybrid organic–inorganic coatings obtained through dual-cure processes

2011

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“…corresponding to the melting temperature of TGIC (101.5 C). This temperature is increased by [7][8][9][10][11][12][13][14][15] C for the microcapsules as the PMMA/TGIC ratio is enhanced from MC-1 to MC-3. The endothermic peak of MC-3 is at 114.…”

Section: Thermal Analysis and Crystal Structure Of The Microcapsulesmentioning

confidence: 99%

Microencapsulation of triglycidyl isocyanurate by solvent evaporation method for UV and thermal dual‐cured coatings

Zhao

Zhou

Tian

et al. 2014

J of Applied Polymer Sci

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Triglycidyl isocyanurate (TGIC), a thermal curing agent, was encapsulated with poly(methyl methacrylate) with small particle size and narrow distribution for the application in acrylic resins to prepare one-package UV and thermal dual-cured coatings. Investigation of the wettability and thermal properties suggests that the microcapsules have better compatibility with acrylic resins and thermal stability as compared to pure TGIC. Results of the release performance experiments indicate good storage stability at 25 C and a quick release of vast TGIC at 120 C for the microcapsules. The UV-thermal dual-cured coatings prepared with the microcapsules exhibit a fast, even and complete hardening at 130 C together with an excellent adhesion to the mild steel panels. The results presented here show an application potential of the microcapsules in UV and thermal dual-cured paints.

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“…Many different strategies for achieving these improvements have been followed in the literature, as for example the incorporation of significant amounts of inorganic fillers, particularly nano-sized inorganic structures [20] and the formation of inorganic domains using a sol-gel process [21,22].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional allyl-terminated hyperbranched poly(ethyleneimine) as component of new thiol–ene/thiol–epoxy materials

Acebo

Fernández‐Francos

Ramis

et al. 2016

Reactive and Functional Polymers

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Tarragona, October 23 th 2015Dear Prof. Advincula:We send our revised manuscript entitled: Multifunctional allyl-terminated hyperbranched poly(ethylenimine) as component of new thiol-ene/thiol-epoxy materials, to be accepted for publication in Reactive and Functional Polymers.We have included practically all the suggestions and corrections made by the reviewers and some answers to their questions have been included in the answer to the reviewer comments file.Looking forward to hearing from you, I remain. We agree and we have performed changes in the paragraph orders.3) Can you know the reaction rate of each scheme in scheme 3? It is not possible to measure both reaction rates, but the first is predominant over the second. We have decided to remove the second mechanism of thiol-epoxy condensation in Scheme 3, since the first equation is much more favorable than the second one. This is because the ammonium salt is much more acidic than the thiol, and then the formation of the thioether alcohol should take place only by the first equation.4) Please discuss the basicity of imidazole and so on. This information of base is important in this study. If we look to the pKa of the ammonium and imidazolium cations we realize that amines are more basic than imidazole (pKa of alkyl ammonium is ~10, whereas pKa of imidazolium is ~7). However, the problem arises from the amount of PEIene in the formulation. When the proportion of PEIene is high it catalyzes the second step in which a base is needed and thiol-epoxy reaction takes place overlapped. On the contrary, when the proportion of PEIene is low, then the basicity of the reaction medium is not enough to reach a complete thiol-epoxy conversion and 1-methylimidazole should be added. 5) Can you get mobility of electron in photo induced polymerization?No, there is no electron mobility. As the radical is formed it reacts instantaneously accordingly to a "click" reaction.6) Can you get turn over number in Scheme 2.The number of cycles is the same than the number of reacting molecules. It is a polycondensation mechanism and not a polyaddition reaction. Thiol-ene is a "click" reaction that occurs in a quantitative way. 7)In scheme 3, left side is same. combine it and only right side should be different scheme. Detailed Response to ReviewersWe have suppressed the second mechanism as commented above.Reviewer #2: Authors synthesized an allyl terminated hyperbranched poly(ethyleneimine). The multifunctional macromonomer has been used as -ene component in thiol-ene/thiol-epoxy curing formulations.Authors need to address the followings to meet publication requirements:1. Please add captions for schemes and figures, respectively.We apologize, but we forgot to add the file with the figure and scheme captions to the manuscript 2. Formats of Table 1, Table 2 and Table 3 are not consistent with each other. Please correct them. It is true. They have been corrected.3. There is a lack of discussion on how authors' work in comparison to others. It is important for authors to address this. formula...

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Hybrid organic–inorganic coatings based on thiol-ene systems

Cited by 47 publications

References 14 publications

Cotton fabrics treated with hybrid organic–inorganic coatings obtained through dual-cure processes

Cotton fabrics treated with hybrid organic–inorganic coatings obtained through dual-cure processes

Microencapsulation of triglycidyl isocyanurate by solvent evaporation method for UV and thermal dual‐cured coatings

Multifunctional allyl-terminated hyperbranched poly(ethyleneimine) as component of new thiol–ene/thiol–epoxy materials

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