Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Thermoplastic blends of PP and waste rubber powder : Effects of compatibilizer on tensile properties, thermal behavior and decomposition kinetics / J.-N. Yan in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 4 (08/2018)
[article]
Titre : Thermoplastic blends of PP and waste rubber powder : Effects of compatibilizer on tensile properties, thermal behavior and decomposition kinetics Type de document : texte imprimé Auteurs : J.-N. Yan, Auteur ; S.-B. Nie, Auteur ; X.-H. Huang ; G.-X. Ding ; J.-B. Zhu Année de publication : 2018 Article en page(s) : p. 460-470 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Alliages polymères -- propriétés mécaniques
Aminopropyltriethoxysilane
Analyse thermique
Anhydride maléique
Caoutchouc
Caoutchouc -- Recyclage
Caractérisation
Cinétique chimique
Ethylène
Greffage (chimie)
Polypropylène
Poudres
Stabilité thermiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : To improve the performances of waste rubber powder filled polypropylene (PP/WRP) blends, WRP was modified by γ-aminopropyltriethoxysilane (APTES) via mechano-chemical method, and then maleic anhydride (MAH) grafted PP (mPP) and MAH grafted ethylene-α-octene copolymer (mEOC) were chosen as the interfacial compatibilizers. The PP/WRP blends were prepared by melt-compounding and compression, and their morphological structures, tensile properties and thermal behavior were investigated carefully. Results showed that modification of APTES decreased the surface energy of WRP and facilitated its compatibility to PP. Both mPP and mEOC could further enhance their interfacial bonding and mPP was superior to mEOC in increasing the tensile strength and elastic modulus. Thermal analysis revealed relative lower melting temperature and crystallinity but higher activation energy for PLA/WRP blends in comparison to pristine PP. Note de contenu : - EXPERIMENTAL : Raw materials - Fabrication of samples - Characterization
- RESULTS AND DISCUSSION : Characterization on the modification of WRP - Morphological structures - Tensile properties - Melt behavior - Thermal stability - Kinetics analysis on the thermal decomposition
- Table 1 : Elemental compositions of the surface of uWRP and WRP by XPS analysis
- Table 2 : Surface energy (γ) and its dispersing (γd) and polar (γp) components for the investigated materials
- Table 3 : Calculated interfacial energies (γAB) for all the possible pairs
- Table 4 : Characteristic parameters of pristine PP and the blends
- Table 5 : Reaction order (n) and activation energy (E) for various samples calculated by Kissinger and Carrasco methodsDOI : 10.3139/217.3439 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30885
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 4 (08/2018) . - p. 460-470[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20077 - Périodique Bibliothèque principale Documentaires Disponible Three-dimensional, non-isothermal simulations of the effect of speed ratio in partially-filled rubber mixing / H. Poudyal in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 2 (05/2019)
[article]
Titre : Three-dimensional, non-isothermal simulations of the effect of speed ratio in partially-filled rubber mixing Type de document : texte imprimé Auteurs : H. Poudyal, Auteur ; I. Ahmed, Auteur ; Abhilash J. Chandy, Auteur Année de publication : 2019 Article en page(s) : p. 219-230 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Calcul
Caoutchouc
Ecoulement tridimensionnel
Mélanges (chimie)
Rhéologie
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Three-dimensional, transient, non-isothermal calculations have been carried out using a commercial computational fluid dynamics (CFD) software in a two-wing rotor-equipped chamber partially-filled (75% fill factor) with rubber, to analyze the mixing efficiency for three different rotor speed ratios of 1, 1.125 and 1.5. The moving mesh technique has been used to incorporate the motion of the rotors. The Eulerian based volume of fluid (VOF) method has been used to track the interface between the two fluids, which are rubber and air. To assign the highly viscous and non-Newtonian properties of rubber, the Carreau-Yasuda model along with an exact Arrhenius formulation that accounts for the shear and temperature dependent viscosity, has been used here. Governing equations including the continuity, momentum and energy equations have been solved to characterize the flow field and various mixing parameters. Eulerian-based fields such as velocity magnitude, viscous heat generation, and average temperature and viscosity are compared between cases with different speed ratios. Dispersive and distributive mixing behaviour are assessed through a Lagrangian approach that tracks the paths of a set of massless particles. Statistical quantities such as cumulative distribution of maximum shear stress, cluster distribution index, and axial and inter-chamber particle transfer rates are calculated and presented as well. Results showed that the speed ratio of 1.5 displayed the best dispersive and distributive mixing characteristics in comparison to the other cases. Note de contenu : - Governing equations
- Material properties and boundary conditions
- Results : Eulerian results : flow and heat transfer - Lagrangian results : dispersive and distributive mixing measuresDOI : 10.3139/217.3680 En ligne : https://drive.google.com/file/d/1u9g_UtA4YlEcu6gAGc8FUszdVBTZqS69/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32402
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 2 (05/2019) . - p. 219-230[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20883 - Périodique Bibliothèque principale Documentaires Disponible Tilting technique improves centering and other features / Heinz Gross in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 3 (03/2012)
[article]
Titre : Tilting technique improves centering and other features Type de document : texte imprimé Auteurs : Heinz Gross, Auteur Année de publication : 2012 Article en page(s) : p. 21-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc
Joints d'étanchéité
Matières plastiques -- Moulage par extrusion-soufflage
Matières plastiques -- Moulage par soufflageIndex. décimale : 668.4 Plastiques, vinyles Résumé : Ring-shaped Dies - A special rubber gasket is now available to seal the parting line between head and die. First pilot projects have shown several promising benefits. The technique is suited for pipe extrusion, film blow molding and extrusion blow molding. Note de contenu : - A wide variety of applications
- Functionality in pipe, tube and capillary production
- Motor-driven centering of ring-shaped dies
- Tilting die technique for extrusion blow moldingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16227
in KUNSTSTOFFE INTERNATIONAL > Vol. 102, N° 3 (03/2012) . - p. 21-23[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 13766 - 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 Toughening up / Stephan Sprenger in ADHESIVE TECHNOLOGY, Vol. 18, N° 1 (03/2001)
[article]
Titre : Toughening up : Hybrid pre-polymers - block co-polymers based on two different reactive elastomers and an epoxy resin - are being investigated as tougheners for adhesives Type de document : texte imprimé Auteurs : Stephan Sprenger, Auteur ; Rainer Utz, Auteur ; Jürgen Bauer, Auteur Année de publication : 2001 Article en page(s) : p. 19-22 Langues : Anglais (eng) Catégories : Caoutchouc
Colles:Adhésifs
Copolymères séquencés
Elastomères
Epoxydes
Formulation (Génie chimique)
Polyéthers
PrépolymèresUn pré-polymère ou prépolymère est un oligomère ou un polymère présentant des groupes réactifs qui lui permettent de participer à une polymérisation ultérieure et d’incorporer ainsi plusieurs unités monomères dans au moins une chaîne de la macromolécule finale.
Les pré-polymères peuvent être di-fonctionnels (c'est le cas des pré-polymères téléchéliques) ou plurifonctionnels. Dans ce dernier cas, ils sont utilisés pour la fabrication de polymères thermodurcissables par réticulation.
Résistance à la traction
Résistance au chocs
RéticulantsIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Epoxy resins are used in quite a few applications because of their many excellent properties, such as good adherence to a variety of substrates. Unfortunately, epoxy resins are very brittle. Therefore most structural epoxy applications, such as adhesives, are formulated with tougheners. Note de contenu :
- Tougheners
- Discussion of results
- Polyether-rubber pre-polymers
- Formulation
- Table 1 : Changes in adhesive properties for different tougheners
- Table 2 : Bulk properties of cured epoxy resins for different tougheners
- Table 3 : Bulk properties of hybrid-toughened epoxy resin
- Table 4 : One-part model adhesive formulations and TGS
- Table 5 : Investigation of model adhesive formulations
- Fig. 1 : Stress-strain diagram of control and hybrid-toughened epoxy resin
- Fig. 2 : Tensile strength for different tougheners
- Fig. 3 : Impact resistance for different toughenersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37347
in ADHESIVE TECHNOLOGY > Vol. 18, N° 1 (03/2001) . - p. 19-22[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001990 - Périodique Bibliothèque principale Documentaires Disponible Transformation du caoutchouc. La prévention débute au biberon / Delphine Vaudoux in TRAVAIL & SECURITE, N° 760 (04/2015)
PermalinkTransformer en économisant / Pauline Léna in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 868 (07-08/2009)
PermalinkUtilisation de la rhéologie pour la description de la morphologie de mélanges caoutchouc naturel/polybutadienne / J. Portal in RHEOLOGIE, Vol. 14 (12/2008)
PermalinkUtilizing pyrolytic biomass products for rubber reinforcement : effect of the silica content in biomass feed stocks / L.-Y. Yu in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 5 (2021)
PermalinkUV-curable HMPSA / Andreas Dobmann in ADHESIVE TECHNOLOGY, Vol. 17, N° 2 (04/2000)
Permalink