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Effect of coupling agent and ground tire rubber content on the properties of natural fiber polymer composites / N. Nikpour in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 4 (08/2016)
[article]
Titre : Effect of coupling agent and ground tire rubber content on the properties of natural fiber polymer composites Type de document : texte imprimé Auteurs : N. Nikpour, Auteur ; Denis Rodrigue, Auteur Année de publication : 2016 Article en page(s) : p. 463-471 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc
Chanvre et constituantsLe chanvre ou chanvrier (Cannabis sativa L.) est la seule espèce du genre botanique Cannabis. Ce terme latin est souvent utilisé aussi comme nom vernaculaire pour distinguer les variétés de chanvre cultivé à usage industriel des variétés de cannabis à usage récréatif ou médical. C'est une espèce de plante annuelle, de la famille des Cannabaceae. La graine de chanvre s'appelle le chènevis.
Composites à fibres végétales
Composites à fibres végétales -- Extrusion
Composites à fibres végétales -- Propriétés mécaniques
Polyéthylène haute densité
Polyéthylène maléate
Réaction de couplageIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this work, high density polyethylene (HDPE)/hemp fiber composites were produced by extrusion compounding followed by injection molding. In particular, the effect of ground tire rubber (GTR) and coupling agent (maleated polyethylene, MAPE) content was studied to modify the mechanical properties of these natural fiber composites (NFC). From the samples produced, a complete characterization was performed including morphology, density, hardness, as well as mechanical properties in tension, flexion, and impact. The results indicate that substantial improvement in NFC impact strength occurred after GTR addition, while tensile and flexural moduli/strengths decreased. On the other hand, the addition of a coupling agent was able to improve adhesion between each phase resulting in better composite properties. Overall, the final properties of the composites represent a balance between elasticity/toughness from GTR and rigidity/strength from hemp and MAPE. From the data obtained, a regression model for different properties is presented to design/control the final properties of these composites. Note de contenu : - MATERIALS
- COMPOUNDING
- CHARACTERIZATION
- EMPIRICAL MODELS
- RESULTS AND DISCUSSION : Morphology - Mechanical properties - Properties modeling - Goodness of fit and prediction of the model - Refinement and analysis of the model - Tensile strength - Tensile modulus - Elongation at break - Flexural modulus - Impact strength - Model application - Tensile strentgh - Tensile modulus - Flexural modulus - Impact strengthDOI : 10.3139/217.3240 En ligne : https://drive.google.com/file/d/1zZRYj6-Ssra4zKWhikpVGkUFhthSg-_R/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26808
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 4 (08/2016) . - p. 463-471[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18238 - Périodique Bibliothèque principale Documentaires Disponible Influence of blending protocol on the thermal and mechanical properties of HDPE/LLDPE blend-based nanocomposites / Fabio R. Passador in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 4 (08/2016)
[article]
Titre : Influence of blending protocol on the thermal and mechanical properties of HDPE/LLDPE blend-based nanocomposites Type de document : texte imprimé Auteurs : Fabio R. Passador, Auteur ; Adhemar C. Ruvolo-Filho, Auteur ; L. A. Pessan, Auteur Année de publication : 2016 Article en page(s) : p. 472-481 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Alliages polymères -- propriétés mécaniques
Alliages polymères -- Propriétés thermiques
Anhydride maléique
Charges (matériaux)
Copolymères greffés
Matériaux hybrides -- Propriétés mécaniques
Matériaux hybrides -- Propriétés thermiques
Montmorillonite
Nanoparticules
Polyéthylène basse densité linéaire
Polyéthylène haute densité
Polyéthylène maléate
RhéométrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Nanocomposites based on high density polyethylene (HDPE)/linear low density polyethylene (LLDPE) blend were prepared by melt compounding in a twin-screw extruder using an organoclay (montmorillonite) as nano-filler and maleic anhydride-grafted linear low density polyethylene (LLDPE-g-MA) as compatibilizer. The effects of two blending protocols were also investigated. In the first blending protocol LLDPE and LLDPE-g-MA were first reinforced with organoclay and then this nanocomposite was later blended with HDPE, and the second blending protocol LLDPE-g-MA was mixed with organoclay first and then this masterbatch was diluted with HDPE and LLDPE. The preparation of the masterbatch resulted in the degradation of polyethylene, with crosslinking formation which increase the viscosity of the polymer and facilitated the dispersion of the organoclay in the polymeric matrix. WAXD and TEM were used to determine the effect of blending protocol and organoclay content on the intercalation and mechanical properties. The introduction of a maleated polyethylene was required to improve the organoclay dispersion in the nanocomposites. Thermal and mechanical properties of the nanocomposites were affected by blending protocols and the content of organoclay. The degree of crystallinity of the materials prepared using the first blending protocol decreased upon the intercalation of clay platelets whereas for the materials obtained using the second blending protocol the degree of crystallinity decreased due the crosslinking which further restricted mobility and diffusion of polymer chains. The nanocomposites show higher values of tensile modulus, flexural modulus and HDT compared to the blend without the addition of organoclay. The OMMT content added to the polymer blend results in significant and well correlated improvements in tensile and flexural moduli. Note de contenu : - EXPERIMENTAL : Materials - Melt processing - Swelling measurements - Nanocomposite preparation - Characterization of the nanocomposites
- RESULTS AND DISCUSSION : Rheometric torque curves - WAXD and TEM analysis - Thermal properties - Mechanical propertiesDOI : 10.3139/217.3238 En ligne : https://drive.google.com/file/d/1SjcBsX-9U4ulsD2GK9mQjCy-2SsOns42/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26809
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 4 (08/2016) . - p. 472-481[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18238 - Périodique Bibliothèque principale Documentaires Disponible