Application of the experimental results to the modified Halpin-Tsai micromechanical model to evaluate the clay dispersion in clay-reinforced polyethylene nanocomposites / N. Uyanik in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 1 (03/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 1 (03/2014) . - p. 28-34 Titre : Application of the experimental results to the modified Halpin-Tsai micromechanical model to evaluate the clay dispersion in clay-reinforced polyethylene nanocomposites Type de document : texte imprimé Auteurs : N. Uyanik, Auteur Année de publication : 2014 Article en page(s) : p. 28-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile Copolymères greffés Dispersions et suspensions Essais dynamiques Itaconate de monométhyle Itaconique, Acide Matériaux hybrides Micromécanique (physique du solide) Montmorillonite Polyéthylène basse densité Polyéthylène basse densité linéaire Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Low-density polyethylene (LDPE)- and linear low-density polyethylene (LLDPE)-based polymer nanocomposites (PNC) containing organically modified montmorillonite (MMT) were prepared by melt mixing process. Itaconic acid (IA) and monomethyl itaconate (MMI) grafted polyethylene (PE) were used as compatibilizers. Na-MMT was modified by dodecyl-, hexadecyl-, and octadecyl-ammonium chlorides and then the compatibilizers were synthesized in solution reaction. 5 wt% organoclay and different concentration of compatibilizers (5, 10, and 15 wt%) were used for the PNC preparations to compare the effects of compatibilizers. The interlayer spacings, d001, and the mechanical properties of samples were measured by XRD analysis and universal testing machine, respectively. The experimental tensile moduli were used in Halpin-Tsai micro mechanical model to obtain "l/t" ratios and the results were compared experimental d001 values obtained from XRD data. It was found that the experimental results are in good agreement with the calculated results. Note de contenu : - Materials - Analyses and characterizations - Preparation of nanocomposites - Calculation methods DOI : 10.3139/217.2797 En ligne : https://drive.google.com/file/d/1MZvk_r77JHArJ_7ztxoqUozjEAu2kK8r/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20572 [article]

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Biobased UV-curable coatings based on itaconic acid / Sara Brännström in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 4 (07/2017) . - p. 851-861 Titre : Biobased UV-curable coatings based on itaconic acid Type de document : texte imprimé Auteurs : Sara Brännström, Auteur ; Eva Malmström, Auteur ; Mats Johansson, Auteur Année de publication : 2017 Article en page(s) : p. 851-861 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Itaconique, Acide Polyesters insaturés Les résines de polyesters insaturés (UP) sont obtenues par polycondensation d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique. Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs. Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable. Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile. Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet Thermodurcissables Index. décimale : 667.9 Revêtements et enduits Résumé : A series of renewable unsaturated polyesters were synthesized from itaconic acid (IA), succinic acid, and 1,4-butanediol by solvent-free polycondensation. Previous studies utilizing IA to make polyesters for coating applications have shown great potential; however, the curing and material properties have not been investigated in detail. The aim of this study was to investigate how the curing is affected by the amount of unsaturations and how well itaconate-based polyesters crosslink without the addition of any other unsaturated monomers or reactive diluents. The chemical structures of the polyesters were confirmed with FTIR, 1H-NMR, and THF–SEC. The degree of curing was studied with FTIR, and the mechanical properties of the crosslinked polyesters were evaluated with DMA, pendulum hardness, and microindentation. The degree of curing was found to be up to 75%, and furthermore, it was found that the final mechanical properties of the crosslinked coatings could be tuned by modifying the IA content in the monomer composition. The results from DMA showed that there is a clear trend between mechanical properties and crosslinking density. Note de contenu : - EXPERIMENTAL : Materials - Analyses - Synthesis of unsaturated polyesters - UV curing and film formation - RESULTS AND DISCUSSION : Effects of reaction conditions and monomer composition on the obtained resin structure - Curing performance and final coating properties DOI : 10.1007/s11998-017-9949-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9949-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28927 [article]

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Development of flame-retardant waterborne polyurethane dispersions (WPUDs) from sulfonated phosphorus-based reactive water-dispersible agents / Dwij Dave in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 1037–1049 Titre : Development of flame-retardant waterborne polyurethane dispersions (WPUDs) from sulfonated phosphorus-based reactive water-dispersible agents Type de document : texte imprimé Auteurs : Dwij Dave, Auteur ; Siddhesh Mestry, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2021 Article en page(s) : p. 1037–1049 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Composés organiques -- Synthèse Dispersions et suspensions Formulation (Génie chimique) Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Itaconique, Acide Polymères ignifuges Polyuréthanes Revêtements -- Propriétés mécaniques Revêtements -- Propriétés thermiques Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The current study presents an attempt to develop two molecules, namely sulfonated aromatic diol (SAD) and sulfonated aromatic diamine (SADAM), to induce flame retardancy, thermal stability, and dispersion ability for water-based polyurethane dispersions (WPUDs). The previously reported itaconic acid-based polyester polyol was used for prepolymer synthesis as well as for chain extension. Pre- and post-sulfonated compounds were subjected to characterization tests such as FTIR, 13C-NMR, 1H-NMR, and CHNS for confirmation of their structures. The standard dispersant used for the basis of comparison was commercially available dimethyl propionic acid (DMPA). WPUDs were synthesized in different molar concentrations of DMPA, SAD, and SADAM, and the covalent incorporation of all three molecules in the polymer backbone was confirmed by FTIR. The WPUD films were subjected to various thermal tests like TGA and DSC as well as mechanical tests like flexibility and pencil hardness. WPUD films obtained from SADAM showed a remarkable increase in Tg as well as char content. The THRI values for SAD- and SADAM-based films were better than DMPA-based films. SAD- and SADAM-based WPUD films also showed an increase in LOI value and UL-94 ratings with the maximum LOI value of 26. Dispersions based on DMPA showed better stability as compared to dispersions based on SAD and SADAM. Note de contenu : - MATERIAL AND METHODS : Materials - Synthesis of an aromatic diol (I-1) - Synthesis of aromatic diamine (I-2) - Sulfonation of I-1 and I-2Synthesis of WPUD - Characterization - RESULTS AND DISCUSSION : CHNS analysis - Physicochemical analysis - FTIR and 1H-NMR analyse - Particle size and zeta potential analysis - Thermal properties - Mechanical properties - Flame-retardant properties - Table 1 : Formulation used for WPUD synthesis - Table 2 : UL-94 rating description - Table 3 : Physicochemical analysis - Table 4 : Particle size and zeta potential analysis - Table 5 : Thermal properties of WPUD films - Table 6 : Mechanical properties of WPUD films - Table 7 : pH of WPUDs - Table 8 : Onset and offset data of TGA DOI : https://doi.org/10.1007/s11998-020-00458-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00458-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36213 [article]

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Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings / Mauricio Pinheiro de Oliveira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 4 (07/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 4 (07/2011) . - p. 439-447 Titre : Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings Type de document : texte imprimé Auteurs : Mauricio Pinheiro de Oliveira, Auteur ; Caroline Reggiani Silva, Auteur ; Lilia Müller Guerrini, Auteur Année de publication : 2011 Article en page(s) : p. 439-447 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Itaconique, Acide Latex Pigments Polymérisation en émulsion Résistance aux frottements humides Revêtements Tags : 'Latex  fonctionnalisé'  'Résistance  à  la  friction'  'Acide  itaconique'  'Polymérisation  en  émulsion'  'Peintures  hautement  pigmentées' Index. décimale : 667.9 Revêtements et enduits Résumé : This study investigates the influence of carboxylic monomers, such as itaconic acid (IA), on the colloidal properties of the latexes made by semi-continuous emulsion copolymerization of styrene (STy) with n-butyl acrylate (BA). A number of copolymerization runs were carried out with different IA concentrations. The effect of functional monomer on the overall conversion, the colloidal properties of the latexes, and the distribution of the carboxylic groups (buried, particle surface and aqueous phase) were examined. The carboxylic groups present in the latexes were analyzed using conductimetric and potentiometric titrations. The behavior of the IA on the wet scrub resistance of highly pigmented paints for architectural coatings was examined and correlated with the distribution of the carboxylic groups. The results obtained showed that the properties of highly pigmented paints are greatly dependent on the amount and distribution of the carboxylic groups. The carboxylic acid distributed in the aqueous phase has a strong influence on the wet scrub resistance and on the characteristics of the final products. Note de contenu : EXPERIMENTAL : Materials - Polymerization - Composition and paint formulation CHARACTERIZATIONS : Particle size analysis - Viscosity and pH - Coagulum formation - Freeze-thaw stability - Carboxylic group distribution - Web scrub test - Optical property RESULTS AND DISCUSSION : Overall conversion and particle size - Distribution of carboxyl groups - Scrub resistance of dried paint film DOI : 10.1007/s11998-010-9317-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9317-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12131 [article]

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Itaconic acid - Green material for adhesives and coatings / Chaitali R. Gadhave in PAINTINDIA, Vol. LXXII, N° 3 (03/2022)  

[article]  inPAINTINDIA > Vol. LXXII, N° 3 (03/2022) . - p. 61-65 Titre : Itaconic acid - Green material for adhesives and coatings Type de document : texte imprimé Auteurs : Chaitali R. Gadhave, Auteur Année de publication : 2022 Article en page(s) : p. 61-65 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colles:Adhésifs Itaconique, Acide Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Owing to the environmental issues, there is a moderate demand of renewable resources in the chemical industry. Conversely, as a rather decrease in side effect of this growth, new chemical building blocks are achieved, which are not commercially accomplished from petroleum sources. The substitution of materials from limited petroleum resources through renewable materials presents the necessary challenge. In this prospect, itaconic acid achieved prominent attention and its trifunctional structure leads to the synthesis of nove) sustainable polymeric materials. ltaconic acid, a carbohydrate derived aliphatic dicarboxylic acid, is a potential chemical for the synthesis of renewable resource-based adhesives and coatings. This material is the biobased mass product itaconic acid, which is structurally similar to monomers like acrylic and methacrylic acid. This paper aims to review the most relevant work in the field of adhesives and coatings derived from itaconic acid and to show the unique properties of these materials and identify the potential applications. Note de contenu : - Itaconic acid uses in adhesives - Itaconic acid uses in coatings - Fig. 1 : Structure of itaconic acid En ligne : https://drive.google.com/file/d/1C06SHibtSF7M1oU9ESd5daluFC9bCz4f/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37515 [article]

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