Synthesis and properties of a novel UV-curable waterborne hyperbranched polyurethane / Xufeng Lin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 3 (05/2014) . - p. 319-328 Titre : Synthesis and properties of a novel UV-curable waterborne hyperbranched polyurethane Type de document : texte imprimé Auteurs : Xufeng Lin, Auteur ; Shouyi Zhang, Auteur ; Jun Qian, Auteur Année de publication : 2014 Article en page(s) : p. 319-328 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polymères ramifiés Polyuréthanes Résistance à l'humidité:Résistance à l'eau Réticulation (polymérisation) Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet:Peinture en phase aqueuse -- Séchage sous rayonnement ultraviolet Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : A series of ultraviolet (UV)-curable waterborne hyperbranched polyurethane dispersions (WHPUDs) have been successfully synthesized by modifying the hyperbranched polyester H10, which was prepared using pentaerythritol as a core molecule and dimethylolpropionic acid as monomers, with succinic anhydride, toluene diisocyanate (TDI), and hydroxypropyl acrylate (HPA). The H10 was characterized by 1H nuclear magnetic resonance spectroscopy and matrix-assisted laser desorption/ionization time of flight mass spectrometry. The properties of the WHPUDs with different content of succinic anhydride and TDI–HPA have been investigated by measuring the stability, the particle size, and the rheological behavior. The effects of the content of succinic anhydride and TDI–HPA were studied in terms of UV-curing rate, water resistance, and thermogravimetric behaviors of WHPUD coatings. The WHPUDs showed good appearance, particle size, viscosity, and storage stability. The WHPUD films showed superior photosensitivity and the percent conversion of C=C bonds reached about 80% when the radiation time was 50 s. Moreover, the UV-cured films had good water resistance and thermostability, which can benefit a waterborne polyurethane resin for waterborne coatings. Note de contenu : - EXPERIMENTAL : Matérials - SYNTHESIS : H10 synthesis - PU prepolymer synthesis - Neutralization of the prepolymer - Dispersion formation - Measurements - Preparation of UV-cured films - RESULTS AND DISCUSSION : Characterizations of H10 - Appearance, stability and particle size of WHPUDs - Rheological behaviors - UV CURING : Water resistance - Heat resistance DOI : 10.1007/s11998-013-9520-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9520-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21451 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16292	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1353-1364 Titre : Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1353-1364 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique Caractérisation Cardanol Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Oligomères Polymères -- Synthèse Revêtements -- Propriétés thermiques Revêtements organiques Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, two kinds of phosphorus-containing cardanol-based acrylates were designed and synthesized. Firstly, a pre-polymer (PT-HCE) with three arms was synthesized using hydroxyethyl cardanol ether (HCE) and phosphorus oxychloride (POCl3) as raw materials. Then, the PT-HCE was acrylated to synthesize phosphate tris-hydroxyethyl cardanol epoxy acrylate resin (AEPT-HCE) and phosphate tris-hydroxyethyl cardanol photosensitive resin (APT-HCE). The structures of PT-HCE, AEPT-HCE and APT-HCE were characterized and the results showed that the photosensitive resins were successfully synthesized. In addition, AEPT-HCE and APT-HCE were used to prepare the flame-retardant UV/EB curing coatings. The properties of the coatings were tested, and the results revealed that different structures have a certain effect on Tg and tensile properties of the coatings. The cured films demonstrated excellent flame-retardant properties, showing flammability rating of V-0 in UL-94 test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phosphorus-containing cardanol-based oligomer - Synthesis of phosphate tris-hydroxyethyl cardanol epoxy acrylate resin - Synthesis of phosphate tris-hydroxyethyl cardanol acrylate resin - Preparation of UV/EB-cured coatings - Characterization - RESULTS AND DISCUSSION : Structure characterization of cardanol-based resin - Double bond conversion ratio of coatings - Analysis of curing and conversion rate - Thermal stability of the coatings - Dynamic thermomechanical analysis of UV/EB-cured films - Properties of the UV/EB-cured coatings - Stress–strain curves of cured films - Flame retardancy of the cured films - Table 1 Thermal properties of UV/EB-cured coatings - Table 2 The properties of UV/EB-cured coatings - Table 3 Refer to American society for testing and materials standard ASTM D3801-10 DOI : https://doi.org/10.1007/s11998-021-00500-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00500-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36438 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22991	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis, characterisation and application of environment friendly polymers for producing sustainable leather / Muhammad Naveed Ashraf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 1 (01-02/2021)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 1 (01-02/2021) . - p. 19-30 Titre : Synthesis, characterisation and application of environment friendly polymers for producing sustainable leather Type de document : texte imprimé Auteurs : Muhammad Naveed Ashraf, Auteur ; Shazad Maqsood Khan, Auteur ; Shahid Munir, Auteur ; Rashid Saleem, Auteur Année de publication : 2021 Article en page(s) : p. 19-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères -- Synthèse Caractérisation Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Eaux usées -- Analyse Formaldéhyde -- Suppression ou remplacement Mélamine-Méthylglyoxal Poids moléculaires Retannage Rhéologie Stabilité thermique Thermogravimétrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of formaldehyde-free melamine-methylglyoxal resins has been produced at various mole ratios of reactants. The methylglyoxal to melamine mole ratio (MG/M) was varied from 3 to 6 and the sodium metabisulfite to melamine mole ratio (SMB/M) was varied from 0.05 to 0.2. Viscosity trend of resins within the series was examined. The prepared resins were used as retanning agents and their improved mechanical and organoleptic properties were noticed in comparison with a commercial melamine-formaldehyde resin. The morphology of grain surface and fibre structure of the leathers was investigated by scanning electron microscopy (SEM). Thermal stability of the optimal resin was assessed and observed to show an improvement over the commercial melamine-formaldehyde resin. Molecular weight and FTIR study of optimal resin was also pursued. Determination of free formaldehyde confirmed that the resulting leather was free from formaldehyde. A pollution load study of retanning effluent showed a significant reduction in chemical oxygen demand, total suspended solids and total dissolved solids for the optimal resin reflecting its improved exhaustion due to optimised molecular size and ability to undergo in situ polymerisation in collagen fibres. The results have shown that the melamine resins of this novel work are suitable for producing formaldehyde-free leather with improved retanning properties and reduced pollution load of the wastewater. Methylglyoxal has been proved as a successful alternate of formaldehyde in resin synthesis to control air emissions and carcinogenic effects while producing sustainable leather. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemicals and apparatus - Synthesis of novel melamine resins using methylglyoxal as a condensing agent - RESULTS AND DISCUSSION : Schematic route of synthesis - Rheology of resins - Evaluation of retanning performance of SMMG resins - Mechanical proerties of leather treated with SMMG resins - Organoleptic properties of the leather treated with novel SMMG resins - Quantitative estimation of free formaldehyde content in treated leather - Molecular weight determination of optimal SMMG resin - Structural elucidation of optimal SMMG resin - Comparative thermo gravimetric analysis of optimal SMMG resin - Analysis of effluent - Table 1 : Mole ratio and physical characteristics of novel SMMG resins - Experimental data - Table 2 : Leather processing materials, conditions and recipe - Table 3 : Mechanical properties of leather treated with sulfonated melamine-methylglyoxal resins - Table 4 : Dependence of flow time, relative viscosity, specific viscosity - Table 5 : Comparative characteristics of effluent after retanning with novel SMMG#06 resin and control resin - Scheme 1 : Reaction of melamine and methylglyoxal at different mole ratio - Scheme 2 : Sulfonation of melamine-methylglyoxal derivative - Scheme 3 : Condensation of sulfonated tetrahydroxy melamine to form polymer molecule En ligne : https://drive.google.com/file/d/14IGqeHhbQcRyM88CW02qqG0GNzcv3Cr6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35314 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22599	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of aniline 2,5 disulfonic acid modified ecofriendly melamine resins and their performance evaluation as leather retanning agents / Muhammad Naveed Ashraf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 5 (09-10/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 5 (09-10/2020) . - p. 216-226 Titre : Synthesis of aniline 2,5 disulfonic acid modified ecofriendly melamine resins and their performance evaluation as leather retanning agents Type de document : texte imprimé Auteurs : Muhammad Naveed Ashraf, Auteur ; Shahzad Maqsood Khan, Auteur ; Shahid Munir, Auteur ; Nafisa Gull, Auteur ; Shahid Khan, Auteur ; Rashid Saleem, Auteur ; Rafi Ullah Khan, Auteur Année de publication : 2020 Article en page(s) : p. 216-226 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Caractérisation Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Eaux usées -- Analyse Formaldéhyde -- Suppression ou remplacement Mélamine -- Synthèse Microscopie électronique à balayage Poids moléculaires Retannage Rhéologie Stabilité thermique Thermogravimétrie Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Amino resins used in the leather retanning process are condensation products of formaldehyde which makes such resins objectionable due to environmental hazards. Due to the carcinogenic effects of formaldehyde, there is a growing demand to produce formaldehyde-free leather. This work involves the synthesis of formaldehyde free melamine resins for producing environment friendly leather with improved retanning properties and thermal stability. A series of resins was produced by condensation of glyoxal and melamine at varied mole ratios. Stability and water solubility was achieved by sulfonation with aniline 2,5 disulfonic acid at varied degrees of sulfonation. Resins were evaluated to measure the viscosity trends in series. Synthesised resins were studied for their comparative retanning properties in comparison with a commercial melamine resin as control. Mechanical properties like tensile strengths tear strengths, and elongation at break were measured and found to be improved. Similarly, the organoleptic properties were also evaluated and found to be better than for the control. Retanned pieces of leather were examined by SEM and tested for free formaldehyde content. The optimal resin was subjected to analysis by FTIR, TGA and molecular weight determination. Effluents collected from retanning baths were tested for pollution load efficiency. The results of the study confirmed that the prepared resins were supportive in producing formaldehyde-free leather with improved mechanical and organoleptic properties. The thermal stability of the resulting resins and pollution load efficiency was also found to be improved. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemicals and apparatus - Preparation of aniline 2,5 disulfonic acid modified melamine glyoxal resins - RESULTS AND DISCUSSION : Schematic route - Rheology of resins - Leather application of MGADS resins as retanning agent - Mechanical properties of leather treated with MGADS resins - Organoleptic properties - SEM analysis of retanned pieces of leather - Quantitative estimation of free formaldehyde contents in leather - Thermogravimetric analysis - Structural elucidation - Molecular weight determination of optimal MGADS resin - Analysis of effluent En ligne : https://drive.google.com/file/d/1QEiBifPuL-H5we65DiaVyKq52J6mp4uk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34522 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22289	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of a curing agent containing trifunctional epoxy groups for powder coatings and its curing reaction kinetics / Qiuping Su in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 907-917 Titre : Synthesis of a curing agent containing trifunctional epoxy groups for powder coatings and its curing reaction kinetics Type de document : texte imprimé Auteurs : Qiuping Su, Auteur ; Zilun Tang, Auteur ; Jiajian He, Auteur ; Yuxin Gu, Auteur ; Yong Li, Auteur ; Jing Xie, Auteur ; Shaoshun Wang, Auteur ; Ruijun Lin, Auteur ; Xiaofeng Lin, Auteur ; Wenjing Lin, Auteur ; Guobin Yi, Auteur Année de publication : 2022 Article en page(s) : p. 907-917 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Cinétique chimique Composés organiques -- Synthèse Morphologie (matériaux) Polyesters Polymérisation Réticulants Revêtements organiques Revêtements poudre Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, tris(oxiran-2-ylmethyl) benzene-1,3,5-tricarboxylate (TOTC) was synthesized by a new two-step method without using harmful epichlorohydrin and served as a curing agent for polyester powder coatings. The chemical structure of TOTC was determined by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The curing behavior and the curing reaction kinetics of TOTC/polyester resin (NH-3307) system were studied by dynamic differential scanning calorimetry. The activation energy Ea was 71.75 kJ mol-1 according to Flynn–Wall–Ozawa method, and the curing reaction of TOTC/NH-3307 system was described by Friedman method. It was found that the curing reaction of TOTC/NH-3307 system was a two-parameter autocatalysis which followed the Å estάk–Berggren model. The nonisothermal curing reaction rate was simulated according to the Å estάk–Berggren model and the experimentally parameters. What is more, the thermogravimetric analysis results showed that the TOTC/NH-3307 system had good thermal stability with an initial decomposition temperature of 374.92°C. The TOTC/NH-3307 cured film exhibited excellent leveling performance by SEM. The results demonstrated that TOTC has efficient curing ability and huge market potential. Note de contenu : - Experimental : Materials - Methods : Synthesis of triallyl benzene-1,3,5-tricarboxylate (TATC) - Synthesis of tris(oxiran-2-ylmethyl) benzene-1,3,5-tricarboxylate (TOTC) - Preparation of powder coatings - Characterization and instrumentation - Results and discussion : Synthesis and characterization of TOTC - Curing kinetics and mechanism analysis : Nonisothermal DSC cure - Curing kinetics - Curing mechanism - Thermal stability analysis - Surface morphology analysis - Table 1 : Characteristic parameters of TOTC/NH-3307 powder coating system - Table 2 : Characteristic peak conversion values and calculated kinetic parameters for autocatalytic model at different heating rates DOI : https://doi.org/10.1007/s11998-021-00578-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00578-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38085 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23605	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of a flame retardant for epoxy resins : Thermal stability, flame retardancy, and flame-retardant modes / Y. Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 2 (2021)  

Permalink

Synthesis of fluorinated polyacrylic acrylate oligomer for the UV-curable coatings / Jianbing Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

Permalink

Synthesis of formaldehyde free amino resin to produce green eco-labelled leather with improved retanning properties / Muhammad Naveed Ashraf in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)  

Permalink

Synthesis of quenchers to control the fluorescence of Rhodamine B and improve the contrast ratio of blue filters for LCDs / Hyun-young Lee in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)  

Permalink

Synthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)  

Permalink

Synthesis of xylitol-based hyperbranched polyurethane acrylate and its application in self-matting acrylate coatings / Ruijun Lin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

Permalink

Synthesis of yellow pyridonylazo colorants and their application in dye-pigment hybrid colour filters for liquid crystal display / Jong Min Park in COLORATION TECHNOLOGY, Vol. 133, N° 2 (04/2017)  

Permalink

Tanning with aluminum-gallic acid complex : a new way to improve the tanning effect of aluminum effects / Hanyu Su in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 3 (03/2021)  

Permalink

Temperature resistance organic coatings - Chemistry and application : an overview / Tejas M. Shah in PAINTINDIA, Vol. LXII, N° 8 (08/2012)

Permalink

The best defence / Yang Wang in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2021)  

Permalink

The effect of ultraviolet ageing on the flame retardancy, thermal stability and mechanical properties of LGFPP/IFR / W.-D. He in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 2 (05/2019)  

Permalink

The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification : an exploration for developing new leather making technology / Shuangfeng Xu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)  

Permalink

The novel synthesis and characterisation of hydroxyapatite and its application in leather making / Y. Z. Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)  

Permalink

Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles / Chao-Ching Chang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

Permalink

Thermal, mechanical and dielectric properties of glass fiber reinforced epoxy-lanthanum manganite nanocomposites / Preseetha Paul Chiriyankandath in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)  

Permalink

---

5 6 7 8 9 10 11 (181 - 200 / 201) Par page : 25 50 100 200