Morphology and thermo-mechanical properties of new hybrid coatings based on polyester/melamine resin and pyrogenic silica

Jacquelot, E.; Galy, Jean; Gérard, Jean‐François; Roche, A.; Chevet, E.; Fouissac, E.; Verchére, D.

doi:10.1016/j.porgcoat.2009.06.005

Cited by 14 publications

(3 citation statements)

References 12 publications

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“…1,2,3,4 Hybrid materials are usually obtained by the addition of preformed nanoparticles, the most significant examples being layered silicates, silica nanoparticles or polyhedral oligomeric silsesquioxane (POSS). 5,6,7 In these cases, the homogenous dispersion of the silica filler in the organic matrix may represent a challenge. An alternative route to incorporate silica into the polymer matrix is the sol-gel process involving a series of hydrolysis and condensation reactions under mild conditions starting from hydrolyzable multifunctional alkoxysilanes as inorganic precursors for forming inorganic domains, being tetraethoxysilane (TEOS) the most typical one.…”

Section: Introductionmentioning

confidence: 99%

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Acebo

Fernández‐Francos

Santos³

et al. 2015

European Polymer Journal

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New epoxy-silica hybrid coatings were prepared by a dual process consisting of a sol-gel process using tetraethoxysilane (TEOS) or 3-glycidyloxypropyl trimethoxysilane (GPTMS) in the presence of hyperbranched poly(ethyleneimine) with ethoxysilyl groups at the chain ends (PEI-Si) followed by a homopolymerization of diglycidylether of bisphenol A (DGEBA) using 1-methylimidazole (1-MI) as anionic initiator. The influence of the amount of TEOS and GPTMS in the characteristics of the coating was examined. Thin transparent films were obtained and their morphology was observed by transmission electron microscopy (TEM). The hydrolytic condensation was confirmed by 29Si-NMR studies. Cage-like nanometric structures were formed in case of adding GPTMS and bigger silica particles on adding TEOS to the formulation. Thermal stability was evaluated by thermogravimetry and the scratch resistance properties were also investigated, showing an improvement in resistance to break and to detachment in all the coatings containing GPTMS. Polymer Journal as you recommended us.As you mentioned in your decision letter the main remark is that the novelty has not been stressed sufficiently. However, the general comments of the reviewers were not bad.We recognized that the redaction did not include the novelty until we reach the discussion part and therefore we have included in the new version your opinion and we have stressed the novelty achieved in our work from the beginning. We have also included some changes suggested by the reviewers. Thus, we hope you can go further with the acceptance of our paper in European Polymer Journal.Looking forward to hearing from you, I remain. Cover LetterComments to the reviewers.Reviewer #1: Graphical abstract:It is not clear what the authors want to transmit in the graphical abstract. The paper is not directly addressing the application procedure of the coatings. The graphical abstract should be adapted to show more clearly the real work addressed in this paper. We have changed completely the graphical abstracts and we hope that the new version clearly represent the work contained in the article HighlightsThe highlights do not reflect the main findings / advances in this paper. They should be rewritten to show the key findings / novelty. We have also changed and stressed the key findings AbstractThe abstract needs to be revised. Does the TEOS / GPTMS affect the properties of the hyperbranched polymer? So yes, in which direction? The abstract should be more indicative of what the reader will find in the paper. The abstract has been rewritten. The addition of TEOS does not affect the properties of the hyperbranched polymer, but the properties of the final hybrid thermoset. The addition of TEOS leads to the formation of bigger particles, quite different from the cage-like particles formed from PEI-Si and/or GPTMS. The addition of GPTMS produces an improvement in resistance to break and to detachment in all the coatings. The incorporation of GPTMS to TEOS containing formulations allowed to prepar...

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Section: Introductionmentioning

confidence: 99%

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Acebo

Fernández‐Francos

Santos³

et al. 2015

European Polymer Journal

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“…These materials can be obtained via different routes: (i) by the addition of preformed nanoparticles or nanoclusters, the most significant examples being layered silicates, silicas, nanotube‐like or needle‐like metal oxides, or polyhedral oligomeric silsesquioxane (POSS), (ii) by in situ generation of an inorganic‐rich phase through a conventional sol–gel process involving hydrolysis and condensation reactions under mild conditions, starting from hydrolysable metal alkoxides, generally alkoxy silanes . These reactions are illustrated in Scheme for tetraethoxysilane (TEOS), often used for the formation of hybrid materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of hybrid films from hyperbranched polyester using a sol–gel process

Houel

Galy

Charlot

et al. 2013

J of Applied Polymer Sci

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International audienceHybrid organic/inorganic materials were prepared by an in situ sol-gel process using tetraethoxysilane (TEOS) in the presence of hyperbranched polyester. The influences of hyperbranched polyester molar mass as well as the amount of TEOS were examined. The condensation degree was characterized by solid state 29Si NMR. The combination of solubility tests, calcination tests, SAXS and dynamic mechanical analysis allowed us to investigate the hybrid material nanostructure. The results show high compatibility between the inorganic silica phase and the organic polymer phase, due to the spherical shape of the hyperbranched polymer and its numerous hydroxyl groups. As a consequence, a continuous inorganic phase was formed even with a low silica precursor content without any macroscopic phase separation. These hybrid materials have a high Tg and high storage modulus even at an elevated temperature combined with improved thermal stability

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“…For example, montmorillonite, sepiolite and kaolin, are usually used to enhance the thermal stability, mechanical performance and surface properties of the hybrid polymeric coatings. [4][5][6][7][8][9][10] As well as we know, the properties of hybrid materials mostly depend on the uniform distribution of the inorganic particles in the organic matrix and the interactions between them, there are many reports in this field. [11][12][13][14][15][16][17][18] In addition, as people's awareness of environmental protection increasing, it is significant for coating industries to produce environmentally friendly products.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Properties of UV-Curable Hyperbranched Polyurethane Acrylate-Polyurethane Diacrylate/SiO₂ Hybrid Coatings

Gao

Li²,

Zeng³

2013

j nanosci nanotechnol

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A series of new UV-curable hybrid coatings were prepared with hyperbranched polyurethane acrylate-polyurethane diacrylate (HBPUA-PUDA) and organic SiO2 as formation, and 2-hydroxyl-2-methyl-l-phenyl-1-propanone (Darocur 1173) was used as photo-initiator. The effect of organic SiO2 content on the thermal stability and conversion of C=C bonds of the UV-cured HBPUA-PUDA/SiO2 films were evaluated using thermal gravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). The morphology of SiO2 were observed by using transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), and the elemental composition of SiO2 was tested by energy dispersive spectrometer (EDS). The results revealed that when organic SiO2 content was less than 30 wt%, the average particle size of SiO2 was about 95 nm and the particles were well-dispersed in the organic phase. The mechanical properties, abrasion resistance and transmittance of the films were also investigated. The results showed that with the increase of organic SiO2 content, the adhesive force and pendulum hardness were increased obviously, while the transmittance and flexibility were decreased. When the content of the organic SiO2 was 30 wt%, the film of HBPUA-PUDA/SiO2 showed the optimal comprehensive performance as follows: pendulum hardness was 0.74, transmittance was 93.1%, adhesion was 0 grade, flexibility was 2 mm, impact strength was 43 Kg x cm and mass loss of 300 cycles was 12.9 mg.

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Morphology and thermo-mechanical properties of new hybrid coatings based on polyester/melamine resin and pyrogenic silica

Cited by 14 publications

References 12 publications

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Synthesis and characterization of hybrid films from hyperbranched polyester using a sol–gel process

Characterization and Properties of UV-Curable Hyperbranched Polyurethane Acrylate-Polyurethane Diacrylate/SiO₂ Hybrid Coatings

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Morphology and thermo-mechanical properties of new hybrid coatings based on polyester/melamine resin and pyrogenic silica

Cited by 14 publications

References 12 publications

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

Synthesis and characterization of hybrid films from hyperbranched polyester using a sol–gel process

Characterization and Properties of UV-Curable Hyperbranched Polyurethane Acrylate-Polyurethane Diacrylate/SiO2 Hybrid Coatings

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Product

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Characterization and Properties of UV-Curable Hyperbranched Polyurethane Acrylate-Polyurethane Diacrylate/SiO₂ Hybrid Coatings