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Effect of nano-particles on flow and recovery of polymer nano-composites in the melt state / H. M. Hassanabadi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
[article]
Titre : Effect of nano-particles on flow and recovery of polymer nano-composites in the melt state Type de document : texte imprimé Auteurs : H. M. Hassanabadi ; Denis Rodrigue Année de publication : 2013 Article en page(s) : p. 151-158 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Composites
Copolymère éthylène acétate de vinyle
Etat fondu (matériaux)
Matériaux hybrides
Montmorillonite
RhéologieIndex. décimale : 668.9 Polymères Résumé : The effect of nano-particle geometry on flow and recovery of polymer melts based on ethylene vinyl acetate (EVA) was investigated. Two nano-particles, calcium carbonate (CaCO3) and montmorillonite clay, were used with concentrations between 2.5 and 15 % by weight. First, by using small amplitude oscillatory shear and transient step shear tests, the linear and non-linear response of the nano-composites was studied. Then, to examine the structure recovery, the same behavior was studied on pre-sheared samples. The linear and non-linear data revealed that the effect of nano-particles in material flow is more important for anisometric particles which can be attributed to their ability to form a fractal structure controlling the rheological properties while spherical particles are not able to form such networks. Recovery experiments revealed that while nano-composites containing spherical particles have relatively similar response in subsequent tests, the rheological properties decreased significantly for platelet particles. The recovery results were also interpreted based on a filler-network mechanism and the reduction of the nano effect for anisometric particles was related to the breakdown of the filler network. These observations were validated by morphological investigations. Note de contenu : - EXPERIMENTS : Materials and samples preparation - Morphological characterization - Rheological analysis
- RESULTS AND DISCUSSION : Morphological characterization - Dynamic data - Shear transient response - Recovery properties under flowDOI : 10.3139/217.2631 En ligne : https://drive.google.com/file/d/1Lc85bqDPopAM8EaN8XAKUMb5otrrWia-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18424
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Code-barres Cote Support Localisation Section Disponibilité 15050 - Périodique Bibliothèque principale Documentaires Disponible Effect of nanoclay addition on morphology and elastomeric properties of dynamically vulcanized natural rubber/polypropylene nanocomposites / Natinee Lopattananon in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
[article]
Titre : Effect of nanoclay addition on morphology and elastomeric properties of dynamically vulcanized natural rubber/polypropylene nanocomposites Type de document : texte imprimé Auteurs : Natinee Lopattananon, Auteur ; S. Tanglakwaraskul, Auteur ; A. Kaesaman, Auteur ; M. Seadan, Auteur ; T. Sakai, Auteur Année de publication : 2014 Article en page(s) : p. 332-341 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères -- propriétés mécaniques
Argile
Caoutchouc
Matériaux hybrides
Mélanges-maîtres (chimie)
Montmorillonite
Nanoparticules
Polypropylène
VulcanisationIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thermoplastic vulcanizate (TPV) nanocomposites based on 60/40 (%wt) natural rubber (NR)/polypropylene (PP) blends were prepared by melt blending in an internal mixer. Sodium montmorillonite (Na-MMT) was first added in natural rubber latex to obtain natural rubber/clay masterbatch, which was subsequently dynamically crosslinked while mixing with molten PP. The effect of Na-MMT content were examined concerning elastomeric properties of NR/PP blends dynamically vulcanized using phenolic resin as a curing agent. Morphology characterization observed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and 3D microfocus X-ray computerized tomography showed that the dynamic vulcanization with nanoclay addition changed the blend morphology from a co-continuous-like structure to droplet-like phase one, and the clay remained within NR phase in intercalated and aggregated forms. Furthermore, the presence of clay induced the decrease in crosslinking of NR, but promoted the mixing between NR and PP during dynamic vulcanization. This suggested that nanoclay worked as a kind of morphology modifier during dynamic vulcanization. The addition of clay marginally enhanced the 100 % modulus and tensile strength, but led to the decrease of the elongation at break. The optimal level of tensile strength improvement was obtained with loading of 5 phr clay. The permanent set of the NR/PP/Clay TPV nanocomposites was well maintained at the acceptable level as elastomer. The resistances to oil and heat were improved with incorporation of clay, proportional to clay loading. The experimental results indicated that the nanoclay had a positive effect on improving the 60/40 NR/PP blend morphology, which provided a little benefit to strength of the TPVs. However, the addition of nanoclay offered an improvement in oil and thermal resistances due to a combined effect of the clay dispersion and improved morphology of NR and PP blends. Note de contenu : - EXPERIMENTAL : Materials - Preparation of TPV/clay nanocomposites - Characterization
- RESULTS AND DISCUSSION : Dispersion of clay - Morphology of TPV/clay nanocomposites - Gel content of TPV/clay nanocomposites - Mechanical properties - Thermal stability - Oil swellingDOI : 10.3139/217.2935 En ligne : https://drive.google.com/file/d/1HcHWGqwmS10eZ3v8TTRo7EW18iPCsGxZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21730
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Code-barres Cote Support Localisation Section Disponibilité 16404 - Périodique Bibliothèque principale Documentaires Disponible Effect of nanoclay surface modifier chemical reactivity on morphology and rheological properties of PP/PA6 blend nanocomposite / G. R. Pircheraghi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)
[article]
Titre : Effect of nanoclay surface modifier chemical reactivity on morphology and rheological properties of PP/PA6 blend nanocomposite Type de document : texte imprimé Auteurs : G. R. Pircheraghi, Auteur ; Hossein Nazockdast, Auteur ; M. M. Salehi, Auteur Année de publication : 2013 Article en page(s) : p. 354-360 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Argile
Cations
DiamineUne diamine est un type de polyamine contenant exactement deux groupes amine. Les diamines sont principalement utilisées comme monomères pour synthétiser des polyamides, des polyimides et des polyurées. La principale diamine produite est le 1,6-diaminohexane, précurseur du Nylon 6-6, suivie de l'éthylènediamine1. L'hydrazine (H2NNH2) n'est en général pas considérée comme une diamine puisque ce n'est ni une amine (pas de carbone), ni une dibase.
Morphologie (matériaux)
Nanoparticules
Polyamide 6
Polypropylène
Rhéologie
Traîtements de surfaceIndex. décimale : 668.4 Plastiques, vinyles Résumé : An attempt was made to explore the role of nanoclay surface modifier chemical reactivity on the morphology and the rheological properties of a polypropylene/polyamide6 (PP/PA6 75/25) nanocomposite blend. The Na-MMT surface was modified with two types of cations; a) diamine cation (D-Clay), and b) a combination of diamine and quaternary alkylammonium cations (A-Clay) via cation exchange reaction. The „nanocomposites samples compatibilized with PP-g-MA were prepared by melt compounding in an internal mixer. The XRD patterns indicated the intercalated/exfoliated microstructure for both nanocomposite samples. The SEM results showed a significant decreases in the PA6 droplet size, from 3.2?m of the simple blend to the 0.4?m in the D-Clay containing sample. Moreover, in the sample containing A-Clay the average droplet size was found to be 1?m. The D-Clay containing sample showed the rheological properties similar to a simple blend in high frequencies with a nonterminal be„havior in low frequencies storage modulus. This was explained by locating of D-Clay layers in the interphase and hence, significantly reducing the effective interfacial tension, ?/R. In contrast, the sample containing A-Clay showed an increased complex viscosity and storage modulus within a range of frequencies, which was attributed to presence of a large amount of A-Clay layers in the PP matrix. These types of nanoclay partitioning were explained by the possibility of chemical reaction between amine group of nanoclay surface modifier and maleic group of PP-g-MA compatibilizer or in-situ formed block copolymer. Consequently, the D-Clay layers bounded with PP-g-MA is preferentially located in the interphase, while, the non reactive nanoclay layers (containing alkylammonium cations) is dispersed in the PP matrix by assistance of PP-g-MA. These findings were also evidenced by TEM micrograph of both nanocomposite samples. Note de contenu : - EXPERIMENTAL/MODELING/SIMULATION : Materials - Na-MMT surface modification - Nanocomposite preparation
- CHARACTERIZATIONDOI : 10.3139/217.2680 En ligne : https://drive.google.com/file/d/1_UVNJId8hAvNEJDYdeG9PJdPTXD622Ly/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19279
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Code-barres Cote Support Localisation Section Disponibilité 15396 - Périodique Bibliothèque principale Documentaires Disponible Effect of novel synthetic clay on the property of waterborne polyurethane leather finishing agent: enhanced thermal, mechanical and UV-resistant performance / Wang Chunhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
[article]
Titre : Effect of novel synthetic clay on the property of waterborne polyurethane leather finishing agent: enhanced thermal, mechanical and UV-resistant performance Type de document : texte imprimé Auteurs : Wang Chunhua, Auteur ; Mu Changdao, Auteur ; Lin Wei, Auteur Année de publication : 2018 Article en page(s) : p. 155-159 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés thermiques
Laponite
Polymères en émulsion
Polyuréthanes
Résistance au rayonnement ultravioletIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Waterborne polyurethane/laponite composites used for leather finishing have been prepared via the solution mixing method. The dispersion stability of laponite and composite emulsions were determined by atomic force microscopy (AFM) and dynamic light scattering (DLS). Thermogravimetric analysis (TGA), tensile testing and UV-Vis spectra were used to test the performance of the resulting films. The results indicate that the nano-particles with negative charges can form highly stable aqueous dispersion under alkaline condition and exhibit good compatibility with anionic waterborne polyurethanes. The emulsions possess good storage stability with an average particle diameter of 80-94nm. The uniformly dispersed clay platelets can markedly improve the thermal stability and mechanical properties of the composites. In addition, the incorporation of small-sized clay is capable of maintaining the transparent appearance of the film and giving an UV-resistant property. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of polyurethane/laponite (LPU) emulsions and films - Characterisation of laponite, WPU and LPU
- RESULTS AND DISCUSSION : Dispersion stability of laponite - Stability of polyurethane emulsions - Thermal stability - Mechanical property measurement - UV-Vis spectra analysisEn ligne : https://drive.google.com/file/d/1qbu9GWV-X22_dw3rlg9nh36Ku5k4rKOM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30797
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Code-barres Cote Support Localisation Section Disponibilité 20058 - Périodique Bibliothèque principale Documentaires Disponible Effect of processing conditions on properties of PET/clay nanocomposite films / H. Ghasemi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)
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Titre : Effect of processing conditions on properties of PET/clay nanocomposite films Type de document : texte imprimé Auteurs : H. Ghasemi, Auteur ; P. J. Carreau, Auteur ; Musa R. Kamal, Auteur ; N. Chapleau, Auteur Année de publication : 2011 Article en page(s) : p. 219-228 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Cloisite
Diffraction des rayons X Ã grand angle
Diffractométrie de rayons X
Films plastiques -- Propriétés mécaniques
Matériaux hybrides
Matériaux hybrides -- Propriétés mécaniques
Matières plastiques -- Extrusion:Polymères -- Extrusion
Microscopie électronique en transmission
Polyéthylène téréphtalateIndex. décimale : 668.9 Polymères Résumé : Polyethylene terephthalate (PET) nanocomposite films (with 3 wt.% Cloisite 30B) were prepared by cast extrusion followed by uniaxial stretching, using chill rolls. Two screw profiles with different mixing elements under different screw speeds (N) and feeding rates (Q) were used to prepare PET/clay nanocomposite (PCN) films. Transmission electron microscopy (TEM) and wide angle X-ray diffraction (WAXD) showed that the clay layers were aligned in the machine direction (MD). XRD patterns depicted that the interlayer distance of clay platelets in the state of intercalation is somehow independent of the processing conditions, but the macro-scale characterization, including barrier and mechanical properties, showed that the level of clay layer delamination was affected by processing conditions. The results reveal that the applied strain has stronger effect than residence time on the barrier and mechanical properties. At the highest screw speed (N = 250 min–1), 27% reduction in oxygen permeability and 30% improvement in tensile modulus were obtained for the more severe screw profile. DOI : 10.3139/217.2446 En ligne : https://drive.google.com/file/d/1CvQd5mAo3iMwpC48oYrC2pqX7YbvTjes/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11526
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Code-barres Cote Support Localisation Section Disponibilité 012997 - Périodique Bibliothèque principale Documentaires Disponible Effect of rheology modifiers on inorganic point of sale colourants / Elvina Rose in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4623 (08/2016)
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PermalinkEffect of the addition of ENR on foam properties of EVA/NR/Clay nanocomposites / Natinee Lopattananon in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)
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PermalinkEffects of a multifunctional polymeric chain extender on the properties of polylactide and polylactide/clay nanocomposites / Q.-K. Meng in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 5 (11/2012)
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PermalinkEnhanced flame retardancy of latex coating doped with clay nanotubes / Anupam R. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 3 (05/2016)
PermalinkEnhancing geotechnical properties of clayey soil with recycled plastic and glass waste / Adnan Shakir Al-Mohammedi Amenah in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 6 (12/2023)
PermalinkÉtude des caractéristiques rhéologiques de suspensions de bentonite / J.-M. Guzik in LES CAHIERS DE RHEOLOGIE, Vol. XIII, N° 1-2 (10/1994)
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