Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Time dependence of morphology and mechanical properties of injection molded recycled PET / B. Molnár in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 2 (05/2017)
[article]
Titre : Time dependence of morphology and mechanical properties of injection molded recycled PET Type de document : texte imprimé Auteurs : B. Molnár, Auteur ; F. Ronkay, Auteur Année de publication : 2017 Article en page(s) : p. 203–208 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Granulés plastiques
Matières plastiques -- Moulage par injection
Matières plastiques -- Propriétés mécaniques
Matières plastiques -- Recyclage
Morphologie (matériaux)
Polyéthylène téréphtalateIndex. décimale : 668.4 Plastiques, vinyles Résumé : During research, injection molded samples were prepared from recycled poly(ethylene-terephthalate) granulate, and their mechanical properties were investigated as a function of time. To understand the changes in mechanical properties, both morphology of injection molded samples and recycled granulates were investigated. A three-phase morphological model was applied for the evaluation of morphological properties while mechanical properties were determined by tensile and impact tests. Relationship was found between morphological and mechanical characteristics as a function of time elapsed since production. Crystalline ratio, tensile strength, and modulus of injection molded specimens increased while impact strength decreased in the four weeks after production. Note de contenu : - EXPERIMENTAL : Materials - Injection molding and sample preparation - Characterization
- RESULTS AND DISCUSSION : Morphology of granulates - Morphology of injection molded samplesDOI : 10.3139/217.3307 En ligne : https://drive.google.com/file/d/1H0CnD-eD3irCTxXnjArPSFrufAk5HTrN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28499
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 2 (05/2017) . - p. 203–208[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18872 - Périodique Bibliothèque principale Documentaires Disponible Timing of polyethylene glycol addition for the control of SiO2 sol structure and sol–gel coating properties / Youlai Xiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Timing of polyethylene glycol addition for the control of SiO2 sol structure and sol–gel coating properties Type de document : texte imprimé Auteurs : Youlai Xiang, Auteur ; Xiaoguang Li, Auteur ; Ai Du, Auteur ; Shuai Wu, Auteur ; Jun Shen, Auteur ; Bin Zhou, Auteur Année de publication : 2017 Article en page(s) : p. 447–454 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de silicium
Granulométrie
Morphologie (matériaux)
Polyéthylène glycol
Revêtements -- Propriétés optiques
Revêtements:Peinture
Sol-gel, Procédé
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyethylene glycol (PEG) was added during the sol process of sol–gel SiO2 coating preparation to investigate the effect of PEG addition timing on particle growth, sol structure, and coating properties. When PEG was added before the addition of the catalyst, the particle size increased from 10 nm (in sol without PEG) to 20 nm, and the necessary aging time for dip coating was shortened from 5 days (in sol without PEG) to ~30 h. When PEG was added 24 h later than the catalyst, the uniform sol structure and small particle unit were obtained. With the delay of the PEG addition timing to 120 h, the improvement in the homogeneity of the sol was continued, whereas the porosity of the resulting coatings decreased. The refractive index of PEG-modified SiO2 coatings can be adjusted in a continuous range between 1.14 and 1.20, using the timing when the PEG was added. The highest peak transmittance of glass that was coated with PEG-modified silica coatings reached 99.90%. All the coatings can be changed from hydrophilic to hydrophobic after hexamethyldisilazane vapor modification. Note de contenu : - EXPERIMENTAL : Preparation of SiO2 sols and coatings
- RESULTS : Viscosity of sols - Particle size and particles distribution - Surface morphology and composition of coatings - Optical properties of coatings - Porosity and wettability of coatingsDOI : 10.1007/s11998-016-9864-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9864-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28159
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 447–454[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Toughening of cardanol based epoxidized novolac resin with acrylonitrile butadiene liquid ruber / Ranjana Yadav in PAINTINDIA, Vol. LXII, N° 12 (12/2012)
[article]
Titre : Toughening of cardanol based epoxidized novolac resin with acrylonitrile butadiene liquid ruber Type de document : texte imprimé Auteurs : Ranjana Yadav, Auteur Année de publication : 2012 Article en page(s) : p. 55-59 Note générale : Bibliogr Langues : Anglais (eng) Catégories : Caoutchouc
Cardanol
Copolymère carboxyle terminé de Butadiène-acrylonitrile
Epoxydes
Morphologie (matériaux)
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy resins are considered as one of the most important classes of thermosetting polymers for many industrial applications, but unfortunately they are characterized by a relatively low toughness. An epoxy resin based on cardanol and varying content of carboxyl-terminated (poly)butadiene acrylonitrile copolymer was cured using polyamine as a hardener. The ultimate aim of the study was to modify the brittle epoxy matrix by the liquid rubber to improve toughness characteristics. In this respect, many efforts have been made to improve the toughness of cured epoxy resins by the introduction of rigid particles, reactive rubbers, interpenetrating polymer networks and thermoplastics within the matrix. Toughening of blend of cardanol based epoxidized novolac resin withvarying weight ration (0-25 wt%) of carboxyl terminated butadiene acrylonitrile (CTBN) copolymer have been investigated. Fourier transform infrared (FTIR) spectroscopic analysis established that the interaction between oxirane groups of epoxy and CTBN were responsible for characteristic peak shifts in the blends compared to their counterparts. Scanning electron microscopy of fracture surfaces indicates cavitation of the rubber particles to be a major deformation mechanism. Particle-particle interaction is also found. Note de contenu : -MATERIALS : Preparation of blend samples of cardanol-based epoxidized novolac resins and carboxyl-terminated butadiene acrylonitrile copolymer (CTBN)
- CHARACTERIZATION OF BLEND SAMPLES : Fourier transforms infrared spectroscopic analysis - Morphology
- RESULTS AND DISCUSSION : Studies on the FTIR spectroscopic analysis - Toughening of epoxy resin by liquid rubber - Chemistry - Morphology and fracturographyPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17165
in PAINTINDIA > Vol. LXII, N° 12 (12/2012) . - p. 55-59[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14545 - Périodique Bibliothèque principale Documentaires Disponible TPU-based porous heterostructures by combined techniques / Alessandra Longo in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 4 (2022)
[article]
Titre : TPU-based porous heterostructures by combined techniques Type de document : texte imprimé Auteurs : Alessandra Longo, Auteur ; Deborah Giannetti, Auteur ; Daniele Tammaro, Auteur ; Salvatore Costanzo, Auteur ; Ernesto Di Maio, Auteur Année de publication : 2022 Article en page(s) : p. 415-426 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Calorimétrie
Caractérisation
Contraintes (mécanique)
Essais dynamiques
Hétérostructures
Impression tridimensionnelle
Masse volumique
Morphologie (matériaux)
Mousses plastiques
Polyuréthanes
Pression
Rhéologie
Température
ThermogravimétrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : The production of thermoplastic polyurethane-based porous heterostructures combining physical foaming with fused deposition modeling is detailed in this contribution. The choice of combining these two techniques lies in the possibility of creating objects endowed with a dual-scale structure at millimeter scale by fused deposition modeling and at microscopic scale by gas foaming. Thermal stability and rheological properties of the neat polymer were studied prior to foaming to design a suitable processing protocol and three different combined techniques are proposed: pressure quench, temperature rise and direct 3D foam printing. Foam morphologies were evaluated by SEM and foamed samples were characterized by thermal and mechanical analyses to highlight the differences among the combined processing techniques. Samples foamed via pressure quench exhibit the highest degree of crystallinity and a uniform cell morphology, also resulting in the largest stiffness. The results presented in this contribution open up the possibility of producing objects with complex geometry and porosity architecture at the dual scale. Note de contenu : - MATERIALS AND METHODS : Materials - Samples preparation - Characterization - Processing methods
- RESULTS : Rheological properties - Thermogravimetry - Morphologies - Density - Differential scanning calorimetry - Compression tests
- Table 1 : Process parameters for the combined foaming processing methods
- Table 2 : Densities of the samples under investigationDOI : https://doi.org/10.1515/ipp-2022-0026 En ligne : https://drive.google.com/file/d/14SiaJ8Y0pDQKi9ya2fwj2sG5jKoQQ1Qx/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37917
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 4 (2022) . - p. 415-426[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23739 - Périodique Bibliothèque principale Documentaires Disponible Transposition of chrome tanning in leather making / Chao Wu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 6 (06/2014)
[article]
Titre : Transposition of chrome tanning in leather making Type de document : texte imprimé Auteurs : Chao Wu, Auteur ; Wenhua Zhang, Auteur ; Xuepin Liao, Auteur ; Yunhang Zeng, Auteur ; Bi Shi, Auteur Année de publication : 2014 Article en page(s) : p. 176-183 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Cuirs et peaux -- Propriétés mécaniques
Eau -- Consommation -- Réduction
Eaux usées -- Analyse
Morphologie (matériaux)
Oxydes de chrome
Post-tannage
Procédés de fabrication
Récupération (Déchets, etc.)
Stabilité hydrothermale
Tannage au chrome
Tannage organique
Wet-white (tannage)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : To avoid the release of chrome from leather into post tanning effluents and the generation of chrome shavings, an inverse chrome tanning technology based on wet white was investigated. Conventional bated pelt was firstly tanned using an amphoteric organic tanning agent (Tingjiang white tanning agent, TWT) without pickling. Then, the TWT tanned wet white was directly processed with conventional post tanning processes. Chrome tanning was transposed to the end of the post tanning. The wet white had a shrinkage temperature (Ts) around 85°C that met the needs of shaving operation, and did not generate chrome shavings. The Ts and Cr2O3 content of the leather, by using this inverse chrome tanning technology, were higher than those of the conventional chrome tanned leather. With this inverse technology, the chrome output was reduced by 48%, mainly because no chrome was released from leather in post tanning processes. Meanwhile, the volume of chromium-containing wastewater discharged from the inverse processes was barely 31% of that from the conventional processes, which makes it much easier to collect and recover chromium from the effluents. Additionally, the tensile strength, tear strength and general appearances of the leather produced by the inverse technology were comparable to those of the conventional chrome tanned leather. Note de contenu : - EXPERIMENTAL : Materials - Leather making processes - Analyses of leather properties (Hydrothermal stability - Distribution of chrome in leather - Morphology of leather - Physical properties) - Analyses of effluents (Total organic carbon concentration (TOC) - Concentration of chrome in effluents
- RESULTS AND DISCUSSION : pH change in leather making processes - Content and distribution of Cr2O3 in leather - Discharge of chrome from leather making processes - Absorption capacity of leathers of retanning and fatliquoring chemicals - Morphology in leathers -Physical properties of leathersEn ligne : https://drive.google.com/file/d/1uviZiCwz4VgYvS-NNEWcomxG72XyP5nM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21515
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 6 (06/2014) . - p. 176-183[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 16325 - Périodique Bibliothèque principale Documentaires Disponible 16406 - Périodique Bibliothèque principale Documentaires Disponible Tunable electrospinning of PA6 nano-cobweb fibrous membrane / Xiaying Liu in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 1 (04/2021)
PermalinkUnique rare earth pigments for more thermally comfortable leathers in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 7 (07/2014)
PermalinkUse of ternary solvent (water - ethanol - ethyl acetate) medium for leather processing : a possible paradigm change / Bhargavi Narayana Reddy Gari in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 7 (07/2016)
PermalinkValorisation des déchets ligno-cellulosiques pour la préparation d’un nouveau matériau composite PVC/farine des noyaux de dattes / Samira Sahi in MATERIAUX & TECHNIQUES, Vol. 109, N° 1 (2021)
PermalinkValorization of almond shells' lignocellulosic microparticles for controlled release urea production : interactive effect of process parameters on longevity and kinetics of nutrient release / Babar Azeem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
PermalinkWater resistance improvement of paperboard by coating formulations based on nanoscale pigments / Wasin Thitsartarn in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
PermalinkWaterborne dimethylolpropionic acid-diisocyanate adducts with alkali-deblockable isocyanate groups as pretanning agent for chrome tanning / Jie Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 2 (02/2015)
PermalinkWool handbook - Volume 1 / Werner von Bergen / New York [Etats-Unis] : Wiley-VCH (1963)
Permalink