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Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier characteristics of paperboards / Pouya Marzbani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier characteristics of paperboards Type de document : texte imprimé Auteurs : Pouya Marzbani, Auteur ; Mohammad Azadfallah, Auteur ; Maryam Yousefzadeh, Auteur ; Farhood Najafi, Auteur ; Ahmad Ali Pourbabaee, Auteur ; Hanna Koivula, Auteur ; Mikko Ritala, Auteur Année de publication : 2021 Article en page(s) : p. 247-257 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Cartonnages
Cires
Dispersions et suspensions
Polyéthylène
Protéines végétales
Soja et constituantsIndex. décimale : 667.9 Revêtements et enduits Résumé : Application of barrier dispersion coatings on paperboards, which must have proper moisture and grease resistance for food applications, has always been an interesting subject for the packaging industry. In this study, paperboards were coated with a novel dispersion barrier coating prepared through mixing soy protein isolate (SPI) and polyethylene wax (PE-wax). Different characterization methods were used to study the effects of coating and its composition on the physical, mechanical, and barrier characteristics of paperboards. The results indicated that the incorporation of PE-wax into the coating formulation caused significant reduction of the viscosity of coating slurries. It had no effect on the coating weight of the samples but increased the thickness of the coated paperboards as compared with those coated with SPI only. The increase of the wax content led to a reduction of 5–16% in the tensile strength values in comparison with the uncoated paperboards. Barrier characteristics, i.e., water vapor permeability (WVP), surface wettability, and water resistance, improved by adding PE-wax. In addition, it was found that there was a critical level for the addition of PE-wax, 50% of SPI, as no oil migration was detected when the paperboards coated with SPI coatings contained less than 50% PE-wax. Note de contenu : - EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : Solid content and viscosity of coatings - Physical characteristics - Mechanical characteristics - Barrier characteristics - Morphological characteristics
- Table 1 : Rheological characteristics of the coatings. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatments
- Table 2 : Physical and mechanical characteristics of the paperboard samples. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatments
- Table 3 : Barrier characteristics of the paperboard samples. The superscript lowercase letters show significant differences. The means followed by the same letter show no significant differences between the treatmentsDOI : https://doi.org/10.1007/s11998-020-00403-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00403-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35367
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 247-257[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible Effect of polytetrafluoroethylene (PTFE) emulsion impregnation coating on filtration performance and thermal property of polyphenylene sulfide (PPS) needle felt / Chao Lv in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
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Titre : Effect of polytetrafluoroethylene (PTFE) emulsion impregnation coating on filtration performance and thermal property of polyphenylene sulfide (PPS) needle felt Type de document : texte imprimé Auteurs : Chao Lv, Auteur ; Ruiqing Shen, Auteur ; Yang Yang, Auteur ; Rui Shu, Auteur ; Guodong Li, Auteur ; Jingxian Liu, Auteur Année de publication : 2023 Article en page(s) : p. 1423-1433 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Feutre (textiles et tissus)
Filtration
Matériaux -- Imprégnation
Matériaux aiguilletés
Polytétrafluoréthylène
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Polytetrafluoroethylene (PTFE) emulsion is widely used as a coating material in the impregnation process for preparing polyphenylene sulfide (PPS) needle felts due to its excellent chemical stability and good mechanical properties. However, the effect of emulsion impregnation coating on the filtration performance of needle felts is still under debate. Moreover, in industrial applications with high temperatures, the service life of needle felts is directly affected by their thermal stability, but the pyrolysis and kinetic properties of PPS needle felt after PTFE emulsion impregnation post-processing have rarely been quantitatively investigated. In this study, the PPS fiber/PTFE emulsion (PPS/PTFE) composite needle felt was fabricated by a direct impregnation process. The pressure drop characteristic and mechanical collection efficiency of PPS needle felt and PPS/PTFE composite needle felt were comprehensively evaluated. It was found that the PTFE emulsion impregnation coating not only increases the pressure drop, but also decreases the collection efficiency. More specifically, for particles having a size below 2.5 μm, the decrement of collection efficiency further increases with the decrease of particle size, but the mechanical collection efficiency of PPS/PTFE composite needle felt for particles having larger size is almost the same as that of PPS needle felt. Three emulsion impregnation coating distribution models were inferred to systematically explain this experimental phenomenon. Additionally, the thermal degradation process of PPS needle felt and PPS/PTFE composite needle felt was analyzed, and several typical pyrolysis kinetic parameters were also determined theoretically. It was confirmed that the PTFE emulsion impregnation coatings can enhance the thermal stability of PPS needle felts. This work provides new insight into the rational application of the direct impregnation process as well as emulsion impregnation coating in the industrial filtration field. Note de contenu : - MATERIALS AND METHODS :
- Materials
- Preparation of PPS/PTFE composite needle felt
- Characterizations
- RESULTS AND DISCUSSION :
- Pressure drop characteristics and mechanical collection efficiency
- Thermal degradation process and reaction kinetics
- Table 1 : Information of experimental materialsDOI : https://doi.org/10.1007/s11998-022-00755-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00755-2.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39726
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 4 (07/2023) . - p. 1423-1433[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24153 - Périodique Bibliothèque principale Documentaires Disponible Effect of practical parameters on the structure and corrosion behavior of vanadium/zirconium conversion coating on AA 2024 aluminum alloy / P. Ahmadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
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Titre : Effect of practical parameters on the structure and corrosion behavior of vanadium/zirconium conversion coating on AA 2024 aluminum alloy Type de document : texte imprimé Auteurs : P. Ahmadi, Auteur ; A. A. Sarabi, Auteur ; H. Eivaz Mohammadloo, Auteur ; H. Behgam, Auteur Année de publication : 2019 Article en page(s) : p. 1503-1513 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
AluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Anticorrosifs
Anticorrosion
Caractérisation
Electrochimie
Métaux -- Revêtements protecteurs
Microscopie à force atomique
Polarisation (électricité)
Revêtement de conversion
Spectroscopie d'impédance électrochimique
VanadiumLe vanadium est un élément chimique, de symbole V et de numéro atomique 23.
C'est un métal rare, dur et ductile que l'on trouve dans certains minerais. Il est principalement utilisé dans les alliages.
Il possède une bonne résistance à la corrosion par les composés alcalins, ainsi qu'aux acides chlorhydrique et sulfurique. Il s'oxyde rapidement à environ 933 K. Le vanadium possède une bonne force structurelle ainsi qu'une faible section efficace d'interaction avec les neutrons de fission, ce qui le rend utile dans les applications nucléaires. C'est un métal qui présente à la fois des caractéristiques acide et basique.
ZirconiumIndex. décimale : 667.9 Revêtements et enduits Résumé : In this research corrosion behavior of the hexafluorozirconic acid-based conversion coating (ZrCC) applied on the surface of AA2024 aluminum alloy, in the absence and presence of sodium metavanadate (ZrVCC), has been investigated. At the first step, practical parameters of ZrCC conversion coating were optimized using data of polarization resistance (Rp) and corrosion current density (icorr) obtained from electrochemical impedance spectroscopy and polarization techniques, respectively. In the next step the effect of sodium metavanadate presence by assessment on the effect of parameters including concentration of sodium metavanadate, immersion time, and solution pH on surface and electrochemical properties was investigated. The optimized practical conditions for ZrCC were immersion time of 60 s in 0.01 M of H2ZrF6 solution at room temperature and solution pH = 2. For the ZrVCC sample, the best results appeared for the immersion time of 60 s in the bath containing 1 g/lit sodium metavanadate at room temperature and pH = 2. Corrosion current density value of the ZrVCC sample was 0.07 µA/cm2 which seems to be 10 times smaller than its amount for the uncoated sample. Film formation of conversion coatings was investigated by field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). FE-SEM and EDS test results revealed that zirconium compounds mostly precipitated on the surface of intermetallic particles. Note de contenu : - EXPERIMENTAL : Specimen preparation - Surface examination - Electrochemical experiments
- RESULTS AND DISCUSSION : Contact angle measurement - Zirconium conversion coating characterization - Effect of NaVO3 on anticorrosion performance - Surface studyDOI : 10.1007/s11998-019-00215-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00215-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33028
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1503-1513[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21154 - Périodique Bibliothèque principale Documentaires Disponible Effect of process conditions on the properties of surface-modified organic pigments encapsulated by UV-curable resins / Osama Abdel Hakeim in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
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Titre : Effect of process conditions on the properties of surface-modified organic pigments encapsulated by UV-curable resins Type de document : texte imprimé Auteurs : Osama Abdel Hakeim, Auteur ; A. A. Arafa, Auteur ; M. K. Zahran, Auteur ; L. A. W. Abdou, Auteur Année de publication : 2018 Article en page(s) : p. 44-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Dispersions et suspensions
Encapsulation
Miniémulsions
Monomères
Pigments organiques
Polymères -- Effet du rayonnement ultraviolet
Traîtements de surfaceIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Aqueous dispersions of nanoscale organic pigments were successfully prepared via ball milling and ultrasonication. The dispersed organic pigments were encapsulated into UV-curable resins via a mini-emulsion technique. Critical factors that affected the dispersion and encapsulation stability were investigated. The encapsulated organic pigments were characterised with transmission electron microscopy, thermogravimetric analyses, Fourier Transform-infrared spectra and zeta potential. The results clarified that the type of dispersing agent plays an important role in achieving maximal dispersion stability. Encapsulated organic pigments showed greater dispersion stability, and better wettability than the original pigments. Polyester tetra-acrylate oligomer can stabilise the mini-emulsion from diffusion degradation and inhibit phase separation with time. 1,6-Hexandiol dimethacrylate was the monomer of choice for ink-jet printing inks. Furthermore, it was found that monomer/oligomer and pigment/resin ratios were more influential and needed to be optimised. Thermal analysis, ultracentrifuge sedimentation and morphologies provided supporting evidence for the encapsulation of organic pigments into UV-curable resins. Note de contenu : - METHODS : Preparation of nanoscale organic pigment dispersions
- PREPARATION OF NANOPIGMENT DISPERSIONS : Effect of dispersing agent type - Effect of dispersing agent concentration
- ENCAPSULATION OF ORGANIC PIGMENT INTO UV-RESINS : Effect of encapsulation on pigment morphology and size distribution - Effect of encapsulation on dispersion stability - Effect of monomer type on encapsulation stability - Effect of monomer/oligomer ratio on encapsulation stability - Effect of pigment/resin ratio on encapsulation stability
- CHARACTERISATION OF ENCAPSULATED PIGMENTSDOI : 10.1111/cote.12318 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12318 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30126
in COLORATION TECHNOLOGY > Vol. 134, N° 1 (02/2018) . - p. 44-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19649 - Périodique Bibliothèque principale Documentaires Disponible Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers / Rania Chaari in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
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Titre : Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers Type de document : texte imprimé Auteurs : Rania Chaari, Auteur ; Fatma Kharrat, Auteur ; Mohamed Khlif, Auteur ; Chedly Bradai, Auteur ; Catherine Lacoste, Auteur ; Philippe Dony, Auteur Année de publication : 2023 Article en page(s) : p. 19-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique
Caractérisation
Composites à fibres végétales
Composites à fibres végétales -- Propriétés mécaniques
Essais dynamiques
Fibres de palmier dattier
Mélange
Polybutylène succinate
Résistance thermique
Rhéologie
Traitement enzymatiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : The rheological properties of biocomposites can change depending on the polymer, fiber type, fiber size and processing conditions. In this work, biodegradable PBS composites filled with raw and enzymatically treated date palm fibers were processed using an internal mixer. The influence of the processing conditions, namely filler concentration, rotor of the mixer rotational speed, as well as the type of the enzymatic fiber treatment on PBS (Poly Butylene Succinate)/date palm fiber composites were studied by measuring the torque and the temperature in real time during melt processing. A rheological analysis was also carried out by performing time and multi-wave-frequency sweeps. It was found that the stabilization torque increased with increasing fiber loading and rotor rotational speed, indicating a higher viscosity. An enhancement of the melting process occurred with modified fibers, which was explained by the decrease in the fiber diameter, denoting cellulose micro-fibrils separation by enzymes action. These composites were characterized by a better thermal resistance and mechanical stiffness compared to those based on raw fibers at the same loading rate. Note de contenu : - MATERIALS : Fiber modification - A fiber size analysis - Manufacturing of the PBS-DPF composites - Morphology analysis - Torque and temperature of the composites during mixing at different operating conditions - Rheological analysis - Tensile tests
- RESULTS AND DISCUSSION : Fiber size distribution - Morphological characterization - Torque and temperature of the composites in the internal mixer at different operating conditions - Rheological characterization - Tensile characterizationDOI : https://doi.org/10.1515/ipp-2022-4251 En ligne : https://drive.google.com/file/d/182C-yWRVGzF6k6TrrMUdFw-y8bmvqvIo/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39191
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 1 (2023) . - p. 19-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24052 - Périodique Bibliothèque principale Documentaires Disponible Effect of siloxane chain length on thermal, mechanical, and chemical characteristics of UV (ultraviolet)-curable epoxy acrylate coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
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PermalinkEffect of solvent volatility on diameter selection of bicomponent nanofibers produced by gas jet fiber process test / S. S. Rajgarhia in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 5 (11/2017)
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PermalinkEffect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application / Hossein Heydari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
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PermalinkEffect of stacking sequence on mechanical, water absorption, and biodegradable properties of novel hybrid composites for structural applications / Tamil Selvan Manickam in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
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PermalinkEffect of structure-controlled aluminum silicate nanofiller on surface properties of emulsion coating films / Fumihiko Ohashi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
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PermalinkEffect of the particle sizes of silica on the properties of UV-curing matting coatings / Ziyuan Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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PermalinkEffect of three structurally different epoxy resins on fire resistance, optical transparency, and physicomechanical properties of intumescent fire-retardant transparent coatings / Raj Shree in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
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PermalinkEffect of vanadium additive and phosphating time on anticorrosion, morphology and surface properties of ambient temperature zinc phosphate conversion coatings on mild steel / Abbasi Mehrdad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
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PermalinkEffect on the corrosion resistance property of aluminum substrate by altering the wetting behavior / Poonam Chauhan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
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PermalinkEffects of acrylic syntans on thermo-mechanical and swelling behaviour of chrome-tanned bovine leather - A comparative assessment / Pankaj Kumar Tyagi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
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PermalinkEffects of adding TiO2 nanoparticles to a water-based varnish for wood applied to nine tropical woods of Costa Rica exposed to natural and accelerated weathering / Róger Moya in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
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PermalinkEffects of age on the structure ad bleaching/dyeing behaviour of hair / Haona Wang in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
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PermalinkEffects of blending poly(lactic acid) and thermoplastic polyester polyurethanes on the mechanical and adhesive properties in two-component injection molding / Marco Klute in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 5 (2022)
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PermalinkEffects of a clean subcritical degreasing system on wool fibers / Qiao Xia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 5 (05/2021)
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PermalinkEffects of collagen fiber addition on the combustion and thermal stability of natural rubber / Weixing Xu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
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