Preparation of UV curable organic/inorganic hybrid coatings-a review

Liu, Fengguo; Liu, Aimin; Tao, Wei; Yang, Youjian

doi:10.1016/j.porgcoat.2020.105685

Cited by 70 publications

(53 citation statements)

References 81 publications

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“…The coating gradually loses its liquidity when the 3 wt% ZnP is doped into the AWP-based coating, corresponding to bad dispersivity of inorganic fillers and weak interface adhesion with polymer. 39 The excessive ZnP also facilitates a stiff and less entangle char-residues, which is too fragile to undergo the thermal stress of flammable volatiles emitted, 26,27 a robust char-residue is available and efficient to retard flame. Additively, the enhanced catalytic decomposition derived from excessive ZnP accelerates the decomposition of AWP-based coating, which is faster than the charring, as measured by the increased FGI in Table 2.…”

Section: Pyrolysis Kinetics Analysismentioning

confidence: 99%

“…The dosage of transition‐metal phosphides in IFRCs is crucial for design a hybrid coating with excellent flame resistance. Because the excessive transition‐metal favors the melt and decomposition of organics and accelerates the flame propagation 26,27 . Additively, the quantitative analysis on the pyrolysis kinetics of phosphides‐containing polymers has been scarce rather than qualitative analysis, which is beneficial for an in‐depth study on the flame‐retarding mechanisms involved in organic–inorganic hybrid coatings.…”

Section: Introductionmentioning

confidence: 99%

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New pivot for investigating flame‐retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane‐based intumescent coatings for flame‐retarding plywood

Wang

Deng

Zhao

et al. 2020

Polymers for Advanced Techs

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The quantitative analysis of zinc phosphate (ZnP) on the flame resistance of intumescent flame retardant coatings (IFRCs) is presented including cone calorimeter (CC) and pyrolysis kinetics, using aliphatic waterborne polyurethane (AWP) as the coating binder. The CC results show that an appropriate dosage (2 wt%) of ZnP in the AWP‐based coating constitutes an improved flame resistance, evidenced by the fire performance index increased from 0.41 to 0.71 seconds m2 kW−1, as well as the reduced fire growth index. The characterization analysis determines the dehydrated ZnP facilitates the formed amorphous char‐residue with a heat‐sink effect, leading to an increase in heat absorption, which climbs from the 253.00to 351.30 J·g−1. Besides, the pyrolysis kinetics verifies that the 3D Jander model (n = 2) mainly governs the whole pyrolysis process of pure coatings by the modified Coats‐Redfern integral method. The ZnP‐containing coating exerts an improved Eα corresponding to 95–200°C, which climbs from 24.96 to 35.80 kJ mol−1, leading to the formation of a continuous and compact char layer. It explores an effective quantitative analysis of the flame resistance of organic–inorganic hybrid IFRCs, deepening the flame‐retarding mechanism.

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Section: Pyrolysis Kinetics Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New pivot for investigating flame‐retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane‐based intumescent coatings for flame‐retarding plywood

Wang

Deng

Zhao

et al. 2020

Polymers for Advanced Techs

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“…Light-induced radical polymerization reactions have gained attention over traditional polymerization methods in terms of higher polymerization reactivity at ambient temperatures, less energy consumption, solvent-free formulations and lower cost [ 1 , 2 , 3 , 4 , 5 ]. These advantages have resulted in the development of many industrial applications such as coatings, adhesives, microelectronics, 3D objects, dental fillings and some other medical applications [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Among the photoinitiating processes, the free radical polymerization (FRP) is the most popular approach [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Ketone Number and Substitution Effect of Benzophenone Derivatives on the Free Radical Photopolymerization of Visible-Light Type-II Photoinitiators

Huang

Chen

2021

Polymers

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Three novel visible-light absorbing benzophenone-based hydrogen acceptors (BPD-D, BPDM-D and BPDP-D) were designed on the basis of a donor–benzophenone–donor structural backbone. Mono or diketone units and double diphenylamine electron-donating groups in para-or meta-positions were introduced to comprehend the electronic and structural effects on free radical photopolymerization (FRPP). Such a structural change leads not only to a red-shift of the absorption maxima but strongly enhances their molar extinction coefficients compared to the commercial phototinitiators such as benzophenone (BP) and 4,4′-bis(diethylamino) benzophenone (EMK). In addition, excellent melting points and thermal decomposition temperatures were achieved for those novel compounds. Further, the photochemical reaction behavior was studied by cyclic voltammograms (CV), photolysis and electron spin resonance (ESR) spectroscopy. Finally, benzophenone derivatives in combination with an amine (TEA, triethylamine) as a co-initiator were prepared and initiated the FRPP of trimethylolpropane trimethacrylate (TMPTMA) using a UV lamp as a light source. When used in stoichiometric amounts, the BPDP-D/TEA had the best double bond conversion efficiency among all the compounds studied, and were even superior to the reference compounds of BP/TEA and EMK/TEA. The results and conclusions could provide the fundamental rules applicable for the structural design of benzophenone derivative-based photoinitiators.

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“…Among these 3DP technologies, digital light processing (DLP) technology printed by UV curing liquid resins, which possesses the advantages of high precision, high resolution, and smooth product surface 7 . Although various photosensitive systems have been extensively studied, 8 acrylates are still the most commonly used printing materials for DLP, due to their high reaction rate and their excellent mechanical properties. However, despite the broad applicability of photopolymerizations and their outstanding characteristics, the traditional acrylate‐based free radical photopolymerization process is limited by a series of shortcomings, including oxygen inhibition, uneven cross‐linked network, and the development of shrinkage and shrinkage stress caused by polymerization urgently to be solved 9 …”

Section: Introductionmentioning

confidence: 99%

Thiol‐terminated hyperbranched polymer for DLP 3D printing: Performance evaluation of a low shrinkage photosensitive resin

Cui

2021

J of Applied Polymer Sci

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In order to lower the volume shrinkage of the DLP 3D printing photosensitive resins during printing, a thiol‐terminated hyperbranched polymer (T‐HBP) was synthesized and introduced into the bisphenol A epoxy acrylate (EA) based photosensitive resin system. The obtained T‐HBP was characterized by FTIR and 1H NMR spectra, and the grafting rate of sulfhydryl was determined. The mechanical properties of the photosensitive resins were measured by tensile and impact strength measurement. The glass transition temperature of the photosensitive resins was analyzed by DSC and the impact fracture surface was observed by SEM. T‐HBP exhibited a much lower viscosity than its linear counterparts, and the addition of thiol improved the curing speed of the photosensitive resins. When the amount of T‐HBP added was 20 wt%, the shrinkage of the photosensitive resins was reduced by about 45.5% and the impact strength increased by 33.9% compared with the control. The macromolecular spherical structure of T‐HBP effectively reduced the functional group density of the photosensitive resins. In addition, the thiol‐acrylate photopolymerization introduced by T‐HBP further reduced the volume shrinkage of the photosensitive resins.

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Preparation of UV curable organic/inorganic hybrid coatings-a review

Cited by 70 publications

References 81 publications

New pivot for investigating flame‐retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane‐based intumescent coatings for flame‐retarding plywood

New pivot for investigating flame‐retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane‐based intumescent coatings for flame‐retarding plywood

Ketone Number and Substitution Effect of Benzophenone Derivatives on the Free Radical Photopolymerization of Visible-Light Type-II Photoinitiators

Thiol‐terminated hyperbranched polymer for DLP 3D printing: Performance evaluation of a low shrinkage photosensitive resin

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