Effect of the composition of vinyl polymer tannages on the physical properties of leather / Jianzhong Ma in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 1 (01/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 1 (01/2001) . - p. 14-22 Titre : Effect of the composition of vinyl polymer tannages on the physical properties of leather Type de document : texte imprimé Auteurs : Jianzhong Ma, Auteur ; Zongsui Yang, Auteur ; Cheng-Kung Liu, Auteur ; Wei Wang, Auteur Année de publication : 2001 Article en page(s) : p. 14-22 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effects of the composition of vinyl polymer tannages on the physical properties of leather have been systematically studied with a statistical two-power regression orthogonal design1. Fracture energy was measured along with tensile strength, elongation and tensile modulus for a wide variety of syntan treated pigskin leathers. Eight monomers: acrylonitrile (AN) , acrylamide (AM), methyl acrylic acid (MAA), methyl methacrylate (MMA), vinyl acetate (VAc), methyl acrylate (MA), ethyl acrylate (EA), and butyl acrylate (BA) were chosen respectively to copolymerize with acrylic acid (AA) to form the corresponding copolymers. Tests showed the excellent physical properties of leather treated by the hexa-copolymer composed of AA, AN, AM, MMA, VAc and EA. After performing the retanning application test by using these copolymers as tannages, the physical properties of the retanned leather samples, such as tensile strength, elongation at break, toughness (fracture energy), and stiffness (Young's modulus ) were measured. The results showed the comonomer ratio of vinyl polymer tannages can greatly affect the physical properties of leather. If the comonomer ratio of the hexa-copolymer composed of AA, AN, AM, MMA, VAc and EA is optimized, the hexa-copolymer tannages can offer significant improvements in the tensile strength, elongation at break, toughness (fracture energy), and softness of the leather samples. En ligne : https://drive.google.com/file/d/1nmu2dgN8w5yB61JR8Em4cf57luLrS-ku/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4401 [article]

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Preparation and application of a multi-functional tanning agent - (MTA) / Jianzhong Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 2 (03-04/1995)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 2 (03-04/1995) . - p. 46-47 Titre : Preparation and application of a multi-functional tanning agent - (MTA) Type de document : texte imprimé Auteurs : Jianzhong Ma, Auteur ; Zongsui Yang, Auteur ; Guifa Zhou, Auteur Année de publication : 1995 Article en page(s) : p. 46-47 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A multi-functional tanning agent has been synthesized by free radical co-polymerisation in water and the factors which affect the polymerisation are discussed. The conditions and properties of MTA used in leather tanning have been studied. The results show that MTA may be used in pretanning, retanning and filing. Thus the level of chrome tanning saltsused may be made more economic and thus pollution due to chrome may be reduced. Leathers produced using MTA appear to be ofhigh quality. The use of MTA does not affect the dyeing or fatliquoring of chromed leather. En ligne : https://drive.google.com/file/d/1K3ZnBTPiOxAWMiLEx9fh-i7uXlJdaEwM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8225 [article]

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Protein retanning and filling agent from vinyl monomer graft modification of chrome shavings hydrolysate / Ma Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 1 (01-02/2004) . - p. 1-5 Titre : Protein retanning and filling agent from vinyl monomer graft modification of chrome shavings hydrolysate Type de document : texte imprimé Auteurs : Ma Jianzhong, Auteur ; Liu Lingyun, Auteur ; Xu Chunhua, Auteur ; Wang Wenqi, Auteur ; Zongsui Yang, Auteur Année de publication : 2004 Article en page(s) : p. 1-5 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Cuirs et peaux -- Déchets -- Recyclage Greffage (chimie) Hydrolyse Monomères polymères vinyliques Recyclage (déchets, etc.) Retannage Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A retanning agent was synthesized from chrome-shaving hydrolysate modified with vinyl monomers. The chrome-shavings were hydrolyzed without de-chroming and were then modified by grafting with vinyl monomers. To provide proof of grafting, the modified hydrolysate was identified by indanthrone, and infrared spectroscopy (IR) The amino acid composition of the hydrolysate and modified hydrolysate were analysed. The results show that the vinyl polymer had been grafted on the polypeptide chains of the hydrolysate with covalent bonds. This protein retanning agent containing chrome was beneficial to the utilization of chrome shavings. Good stretch and filling properties were obtained from leather retanned with this agent. Note de contenu : - EXPERIMENTAL PROCEDURE : Hydrolysis of chrome-shavings - Comparison application experiment with the modified chrome shavings hydrolysate - Proof of grafting modification of chrome-shavings hydrolysate - RESULTS AND DISCUSSION : Results of physical and chemical inspection of chromeshavings (Table II) - Results of Orthogonal Design experiments on modification of chrome-shavings hydrolysate by vinyl monomer grafting. (Tables III and IV) - Proof of Graft Modification - FTIR Spectroscopy - Amino Acid Composition Analysis Results - Table 1 : The factors and levels of the orthogonal design for graftmodification of chrome-shavings hydrolysate with vinyl monomers - Table 2 : Physical and chemical inspection of chrome-shavings - Table 3 : Results of orthogonal design experiments of modification of chrome-shavings hydrolysate by grafting with vinyl monomers - Table 4 : The experimental plan and comprehensive analysis results of orthogonal design experiments - Table 5 : Thickness increment ratio for 3 types of retanning agent - Table 6 : Results of physical-mechanical testing of leathers retanned with 3 types of retaning agent - Table 7 : Amino acid composition of chrome-shavings - Table 8 : Amino acid composition of modified product of chrome-shavings hydrolysate En ligne : https://drive.google.com/file/d/1aKiyWlfPIryl8jdctrJBHjh4Kf__6y0-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39647 [article]

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Study of soft side upper leather retanned with multi-functional tanning agent - MTA / Jianzhong Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 4 (07-08/1995)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 4 (07-08/1995) . - p. 107-109 Titre : Study of soft side upper leather retanned with multi-functional tanning agent - MTA Type de document : texte imprimé Auteurs : Jianzhong Ma, Auteur ; Zongsui Yang, Auteur ; Xiao Yaomin, Auteur Année de publication : 1995 Article en page(s) : p. 107-109 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Application of MTA in the retannage of soft cattlehide upper leather has been studied by the official test (Beijing University test). The results show that the leathers are of high quality with good grain, fullness and elasticity. Furthermore, MTA is convenient to use and does not affect the dyeing or fatliquoring. En ligne : https://drive.google.com/file/d/1_fqfmdjmq70MAN01zd4tadVKu7Ck9R73/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8213 [article]

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Synthesis of modified poly(acrylic acid-acrylonitrile) retanning agent with mannich reaction and its application / Huaxiang Yang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 11 (11/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 11 (11/2001) . - p. 437-443 Titre : Synthesis of modified poly(acrylic acid-acrylonitrile) retanning agent with mannich reaction and its application Type de document : texte imprimé Auteurs : Huaxiang Yang, Auteur ; Jianzhong Ma, Auteur ; Zongsui Yang, Auteur Année de publication : 2001 Article en page(s) : p. 437-443 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The modified poly(acrylic acid-acrylonitrile) (P(AA-AN)) with Mannich reaction was synthesized and characterized by 1H-NMR, 13C-NMR and IR. It was shown that the carboxyl ?-H of P(AA-AN), under the proper conditions, has enough activity to react with Mannich reagents. The resulting modified product, named ASF, was used in the retanning of goatskin garment leather. The application results of ASF showed that it can improve the dyeing property of the wet leather retanned with it and it has an excellent filling and obvious selective filling properties. The comprehensive properties of ASF were quite acceptable. En ligne : https://drive.google.com/file/d/1scnKGJVg3AzrAGDfUjHL3qD2cmYHKEAQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4350 [article]

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Tanning mechanism of vinyl polymer/montmorillonite nanocomposite tannage / Yan Bao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)  

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The correlation between composition of vinyl polymer tannages and their properties / Wei Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 4 (07-08/2001)  

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The correlation between the comonomer ratios of vinyl polymer tannages and their application properties / Jianzhong Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 2 (03-04/2002)  

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The preparation and application of a montmorillonite-based nanocomposite in leather making / Jianzhong Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)  

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