Influence of hydrophobic side chain structure on the performance of amphiphilic acrylate copolymers in leather making / Jinxia Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 2 (03-04/2016) . - p. 67-72 Titre : Influence of hydrophobic side chain structure on the performance of amphiphilic acrylate copolymers in leather making Type de document : texte imprimé Auteurs : Jinxia Du, Auteur ; Cai Huang, Auteur ; Biyu Peng, Auteur Année de publication : 2016 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Copolymères Cuirs et peaux -- Propriétés mécaniques Douceur (toucher) Etanchéité Polyacrylates Polymères amphiphiles Retannage Tannage au chrome Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of amphiphilic copolymers with different hydrophobie side chain structures were prepared through radical copolymerization of acrylic acid and varying hydrophobie acrylate monomers which were then applied to the retanning and fatliquoring processes of chrome-tanned leather. The main properties of the processed leathers were evaluated. The results showed that this kind of copolymer could give to leather, good filling effects, softness, waterproofness and mechanical strength. The application performances of the copolymers in leather-making were obviously affected by the hydrophobie side chain structure, especially the hydrophobie side chain length of copolymers. Compared to copolymers with branched side chains, the copolymers with straight hydrophobie side chains exhibited botter comprehensive performances. Most of the above mentioned properties of the treated leathers were improved significantly with the increase of side chain length. When the length of the hydrophobie side chain was more than C16, they can give leather excellent waterproofness, softness and mechanical strength. The results of dynamic mechanical analysis (DMA) and the scanning electron microscope (SEM) images also showed that the fibre bundles in the leathers were well separated and lubricated by the long hydrophobie side chains. Note de contenu : - EXPERIMENTAL PROCEDURES : Preparation of amphiphilic acrylate copolymers - Characterization of amphiphilic copolymers and the performances of treated lather - RESULTS AND DISCUSSION : Synthesis and characterization of amphiphilic acrylate copolymers - FIlling and fatliquoring properties of amphiphilic polymers - Waterproofness of amphiphilic polymers treated leather - Physical and mechanical properties of amphiphilic polymers treated leather En ligne : https://drive.google.com/file/d/1ZHDIhULrHGSQMd5f8xTbeiYEulSAczUX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26089 [article]

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Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather / Huang Yingying in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 3 (05-06/2023) . - p. 93-97 Titre : Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather Type de document : texte imprimé Auteurs : Huang Yingying, Auteur ; Jinxia Du, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 93-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Copolymère ester acrylique Copolymères -- Synthèse Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Epoxydes Glutaraldéhyde Huiles et graisses Polymères amphiphiles Polymérisation en émulsion Produits de nourriture du cuir Résistance à la déchirure Tannage chrome free Tannage organique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Acrylic-acrylic long-chain ester amphiphilic copolymers are a class of leather retanning and fatliquoring materials with superior properties. However, these types of copolymers lack reactive groups and possess weak binding ability to organically-tanned leather. In this paper, a terpolymer Poly(AA-LA-GMA) containing reactive epoxy groups was prepared by emulsion copolymerisation of acrylic acid (AA), dodecyl acrylate (LA) and glycidyl methacrylate (GMA) monomers. The effect of the GMA content on its binding ability to leather fibres and its fatliquoring properties was investigated. The results showed that the introduction of the epoxy group can significantly improve the combination of copolymer with glutaraldehyde-tanned leather. When the content of GMA monomer reached 10% of the total monomer amount (mol), the dichloromethane extraction rate and fogging value of the fatliquored leather were reduced by about 34% and 53%, respectively. And the excellent binding ability improved the softness and tear strength of the fatliquored leather. Note de contenu : - INTRODUCTION : Materials - Synthesis of epoxy-modified amphiphilic copolymers - Determination of the content of the residual monomer - Fourier Transform Infrared spectroscopy (FTIR) - Application of Poly(AA-LA-GMA) in the fatliquoring process - Determination of the absorption rate of fatliquor - Determination of softness and tear strength of crust leather - Determination of dichloromethane extraction rate - Determination of fogging value - RESULTS AND DISCUSSION : Preparation and characterisation of Poly(AA-LAGMA) - Fatliquoring effects of Poly(AA-LA-GMA) on chrome-tanned leather - Fatliquoring effect of Poly(AA-LA-GMA) to glutaraldehyde-tanned leather - Action mechanism between epoxy-modified amphiphilic copolymer and leather - Table 1 : Fatliquoring effects of amphiphilic copolymers to chrome-tanned leather - Table 2 : Fatliquoring effects of amphiphilic copolymers to glutaraldehyde-tanned leather - Fig. 1 : Schematic of the copolymerisation reaction - Fig. 2 : Action mechanism between epoxy-modified amphiphilic copolymer and leather En ligne : https://drive.google.com/file/d/1KByCAQkl2D1o3TmoIgqbuA3ZMjFh8hZt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39579 [article]

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