Adsorption properties of acid dye on amine-terminated dendritic polymer / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 112-122 Titre : Adsorption properties of acid dye on amine-terminated dendritic polymer Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Zhao Jing, Auteur ; Bu Qiaoqiao, Auteur ; Ren Longfang, Auteur Année de publication : 2017 Article en page(s) : p. 112-122 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Colorants -- Adsorption Colorants acides Eaux usées -- Epuration Polymères -- Synthèse Polymères à terminaison amine Polymères dendritiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of amine-terminated dendritic polymers (ADPs) were synthesized by stepwise substitution reaction and were used as an adsorbent for removal of acid black dye NT from aqueous solution. Comparison experiments showed that the ADP-3 has good adsorption effect. Then, the effects of various parameters such as initial acid black dye NT concentration (50-300mg/L) and solution pH(1.5- 6.5) were investigated. The point of zero charge (PZC) of ADP-3 has been determined. Specific surface area and average adsorption pore size of the ADP-3 were 21.378m2/g and 3.833nm, respectively. Field scanning electron microscopy (FESEM) indicated that the adsorption material has porous structure, which provided favorable conditions for adsorption process. The experimental data were analyzed by Langmuir and Freundlich models of adsorption. Equilibrium data were fitted well with the Freundlich model. Thermodynamics parameters, ?G, ?H and ?S indicate that the adsorption of acid black dye NT onto ADPs were spontaneous and endothermic process in nature. Pseudo-first-order and pseudo-second-order kinetic models vvere used to fit the adsorption kinetic data. The adsorption kinetics was found to follow the pseudo-first-order kinetic model. Amino blocking indicated that the amine content plays an important role in the adsorption process. The adsorbent was also applied to the treatment of leather dye effluent, the results showed that ADP-3 exhibit a prominent adsorption property on leather dye effluent. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and instruments - Preparation of ADP - Contrast experiments - Characterisation of products - Adsorption experiments - Adsorption mechanism - Adsorption application in leather dye effluent - RESULTS AND DISCUSSION : Amino contents - Contrast experiments results - The point of zero charge (PZC) of ADP-3 - Instrument characterization - Adsorption experiment results - Adsorption kinetics - Adsorption mechanism - Adsorption application in leather dye effluent En ligne : https://drive.google.com/file/d/1Tixq7ruz2XOqaidv26cg77Xmq-D4t0cL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28795 [article]

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Ambient temperature and UV-cured hybrid coatings from acetoacetylated non-isocyanate polyurethanes / H. R. Asemani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 469-488 Titre : Ambient temperature and UV-cured hybrid coatings from acetoacetylated non-isocyanate polyurethanes Type de document : texte imprimé Auteurs : H. R. Asemani, Auteur ; V. Mannari, Auteur Année de publication : 2021 Article en page(s) : p. 469-488 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétoacétate Caractérisation Essais (technologie) Matériaux hybrides Michael, Addition de L'addition de Michael ou réaction de Michael est une réaction qui permet la création de liaisons carbone-carbone, voire de liaisons carbone-soufre. Il s'agit de l'addition nucléophile d'un carbanion sur un composé carbonylé α,β insaturé (aldéhyde, cétone et même ester α,β insaturé, des nitriles et des amides α,β insaturés pouvant aussi être utilisés). Elle appartient à la famille des additions nucléophiles conjuguées. Cette réaction doit son nom au chimiste américain Arthur Michael. Oligomères Photoréticulation Polymères -- Synthèse Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Revêtements sans isocyanates Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : Preparation of ambient and UV curing non-isocyanate polyurethane (NIPU) coatings has been reported using a series of acetoacetylated non-isocyanate polyurethane (AA-NI-PUPO) oligomers. Synthesized oligomers were characterized using various techniques such as Fourier transform infrared and nuclear magnetic resonance spectroscopy. AA-NI-PUPOs showed significantly lower viscosity compared to their non-acetoacetylated counterparts. Ambient temperature-cured systems were formulated by mixing AA-NI-PUPOs and different primary amine compounds in stoichiometric proportions. Michael addition reaction of acrylates and AA-NI-PUPOs was initiated by UV curing using a photobase generator as the catalyst. NIPU coatings were studied for various thermo-mechanical properties and corrosion resistance. The selected UV-cured and ambient-cured samples showed instant and 1-h tack-free time, respectively. Results revealed that with proper selection of acetoacetylated resin and crosslinker type, coatings with properties comparable to conventional PU coatings could be formulated. Moreover, UV-curable coatings with up to 90 wt% solid could be formulated using conventional monomeric acrylates as a reactive diluent. The study demonstrates the feasibility of formulating solvent-free rapid ambient curing non-isocyanate polyurethane coatings. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of oligomers - Preparation of coating compositions - Test methods - RESULTS AND DISCUSSION : Characterization of AA-NI-PUPOs - Viscosity measurements - Curing characterization of UV-NIPUs - Cured-film properties - Table 1 : List of acronyms used to identify oligomers and coating systems - Table 2 : Characteristics of different resins used in this study (Mn: number average molecular weight, AA : acetoacetate) - Table 3 : Screening results for A-NIPU coating samples - Table 4 : Screening results for UV-NIPU coating samples - Table 5 : Extended coating properties for selected A-NIPU coating samples - Table 6 : Extended coating properties for selected UV-NIPU coating samples - Table 7 : Tg, Td5% and Td50% values obtained from DSC and TGA analyses for selected NIPU coating samples DOI : https://doi.org/10.1007/s11998-020-00425-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00425-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35608 [article]

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Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 12 p. Titre : Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Qiaoxuan Niu, Auteur ; Jing Zhao, Auteur ; Taotao Qiang, Auteur Année de publication : 2020 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composés amphiphiles Encapsulation Polymères -- Synthèse Polymères amphiphiles Systèmes auto-assemblés Index. décimale : 668.9 Polymères Résumé : A series of amphiphilic hyperbranched polymers (AHP-s, the “s” refers to the algebra of AHP) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP-s, the “s” refers to the algebra of HBP) and palmitoyl chloride. FTIR, NMR and GPC were used to determine the structure of AHP-s, the results showed that AHP-s exhibits core-shell structure. The thermal properties of polymers were investigated by DSC and TGA. It was found that AHP-2, AHP-3 and AHP-4 display higher thermal stability than AHP-1 (AHP-1, AHP-2, AHP-3 and AHP-4 represent the first, second, third and fourth generation AHP, respectively). Furthermore, the self-assembly performance of AHP-s in THF solvent was investigated by TEM and SEM. Finally, the encapsulation capacity of the AHP-s for methyl orange (MO) was explored at different concentrations of AHP-s and pH conditions. It was found that AHP-s is capable of accommodating hydrophilic guest MO. Moreover, the higher generation of AHP-s, the stronger encapsulation capacity obtained. And the encapsulation capacity closely associated with the pH of encapsulation system. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic hyperbranched polymers (AHP-s) - Characterization - Self-assembly experimental method in THF - Methodology for dye extraction phase transfer processes - Phase transfer experiment under different pH - RESULTS AND DISCUSSION : Characterization of amphiphilic hyperbranched polymers - Thermal properties of amphiphilic hyperbranched polymers - Self-assembly of amphiphilic hyperbranched polymers in THF - Phase transfer mechanism - Phase transfer mechanism under different pH DOI : https://doi.org/10.1186/s42825-019-0015-7 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0015-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37328 [article]

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An A2 + CB2 approach to the synthesis of hyperbranched polyester polyol and application in PU coatings / Amardip M. Patil in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1085-1095 Titre : An A2 + CB2 approach to the synthesis of hyperbranched polyester polyol and application in PU coatings Type de document : texte imprimé Auteurs : Amardip M. Patil, Auteur ; Dhammanand J. Shirale, Auteur ; Harishchandra D. Jirimali, Auteur ; Ramanand N. Jagtap, Auteur Année de publication : 2024 Article en page(s) : p. 1085-1095 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse morphologique Caractérisation Enrobage (technologie) Polymères -- Synthèse Polymères ramifiés Polyuréthanes Résistance chimique Revêtements -- Analyse Revêtements organiques Stabilité thermique Surfaces -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : In the present work, neopentyl glycol was used as a core for the synthesis of hyperbranched polymer by melt condensation polymerization with 2,2-Bis(hydroxymethyl) propionic acid. The A2 + CB2 synthetic method was used where neopentyl glycol was A2 and 2,2-Bis(hydroxymethyl) propionic acid was CB2. The acid value and hydroxyl values of the synthesized hyperbranched polymer were determined according to ASTM D974 and ASTM D4274, respectively. The molecular structural characterizations of hyperbranched polyol were determined by FTIR and NMR spectroscopy techniques. The hyperbranched polyurethanes were synthesized by using hyperbranched polyol and crosslinking agent isophorone diisocyanate in different mole ratios of OH:NCO (1:1.2, 1:1.4, 1:1.6). These mixtures were used as coating materials on mild steel panels and glass plates. The coating properties of polyurethanes such as gloss and cross-cut adhesion were studied. The immersion test of coatings was carried out in HCl, NaCl, NaOH and water. The electrochemical properties of the coatings were examined using an electrochemical method in electrolytes consisting of HCl, NaOH, and NaCl. Thermal stability and surface morphology were studied by TGA and SEM, respectively. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of hyperbranched polyester polyol (HBP) from neopentyl glycol (NG) - Preparation of hyperbranched polyurethane (HBPU) - Characterizations - Functional group analysis - Structural study - Coating properties - Chemical resistance - Electrochemical study - Thermogravimetric study - Study of scanning electron microscopy images - RESULTS AND DISCUSSION : Study of FTIR and NMR spectra - Coating properties - Chemical resistance - Electrochemical study of the HBPU coatings - Thermogravimetric analysis of HBPU - Study of scanning electron microscopy images DOI : https://doi.org/10.1007/s11998-023-00875-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00875-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41078 [article]

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Application of amphoteric polymers in the process of leather post-tanning / Xuechuan Wang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 9 p. Titre : Application of amphoteric polymers in the process of leather post-tanning Type de document : texte imprimé Auteurs : Xuechuan Wang, Auteur ; Sun Siwei, Auteur ; Xing Zhu, Auteur ; Guo Peiying, Auteur ; Liu Xinhua, Auteur ; Chunlin Liu, Auteur ; Meng Lei, Auteur Année de publication : 2021 Article en page(s) : 9 p. Langues : Anglais (eng) Catégories : Agents de tannage Composés amphotériques Cuirs et peaux Polymères -- Synthèse Post-tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : With the characteristics of controllable charge and environmental friendliness, amphoteric polymers can be used in post-tanning process to solve the problems that arise during leather making and are caused by the low absorption rate of single-charge chemicals, incompatibility with new tanning methods, and complex operation process. In this review, the structure, performance, and preparation of amphoteric polymers are reported. Then, the charge change of collagen during different tanning and pH treatments is introduced. Finally, the application and development of amphoteric polymers during the post-tanning process of leather making are discussed. This review has certain guiding significance to the preparation and application of amphoteric polymers for tanning system. Note de contenu : - STRUCTURE, PROPERTIES, AND SYNTHESIS METHODS OF AMPHOTERIC POLYMERS : Structure and properties of amphoteric polymers - Synthetic methods of amphoteric polymers - AMPHOTERIC PROPERTIES OF COLLAGEN AFTER TANNING : - RESEARCH PROGRESS OF AMPHOTERIC POLYMER DURING POST-TANNING : Retanning agent - Fatliquoring agent - Other materials - CONCLUSIONS AND PROSPECTS : Development of amphoteric polymers with different structures for leather making - Study on the interaction mechanism between amphoteric polymers and leather Exploration of characterization methods - Clean application process of amphoteric materials in post-tanning Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37474 [article]

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Application of bio-itaconic acid acrylic polymer in leather processing / Tungmin Wu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 1 (01-02/2023)  

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Application of carboxyl-functionalized epoxy resin in the leather tanning process / Bin Lyu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 7 (07/2018)  

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Application of nonionic gemini aliphatic polyurethane surfactant for improving the performance of vegetable tanned leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 11 (11/2019)  

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Auto-deposition coating / Vikesh Kumar Singh in PAINTINDIA, Vol. LXVII, N° 9 (09/2017)  

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Automated parallel polyurethane dispersion synthesis and characterization / Mohammed J. Nasrullah in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 1 (03/2009)  

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Aziridine cure of acrylic colloidal unimolecular polymers (CUPs) / Jigar K. Mistry in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

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Bio-based hybrid polymers from vinyl ester resin and modified palm oil : synthesis and characterization / A. Fakhari in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 1 (03/2017)  

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Bio-based polyester itaconates as binder resins for UV-curing offset printing inks / Tobias Robert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

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Biobased polyol with self-crosslinking functionality in COATINGS TECH, Vol. 19, N° 1 (01/2022)  

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A brief review of the graphene oxide-based polymer nanocomposite coatings: preparation, characterization, and properties / Zahra Shahryari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

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Caoutchoucs et textiles synthétiques / Jean Vène / 1967

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Castor oil-based waterborne hyperbranched polyurethane acrylate emulsion for UV-curable coatings with excellent chemical resistance and high hardness / Daidong Wei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)

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Characterization on biodegradation of enzymatically synthesized polylactic acid by using alkaline protease and lipase / Didem Omay in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)  

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Chemical and anticorrosion characterization of polysilsesquioxane coatings catalyzed by different acids / Wentao Xing in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)  

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Climate protection via bio-based polyurethane dispersions with heat activation / Daniel Maga in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 4/2017 (2017)

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