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The processing behavior of liquid Sn/molten polyethylene during internal mixing / G. Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)
[article]
Titre : The processing behavior of liquid Sn/molten polyethylene during internal mixing Type de document : texte imprimé Auteurs : G. Zhang, Auteur ; T. Liu, Auteur ; X. Liu, Auteur ; Y. Yi, Auteur ; L. Liu, Auteur ; X. Tan, Auteur ; J. Luo, Auteur ; J. He, Auteur ; H. Ma, Auteur ; A. Lu, Auteur ; Z. Deng, Auteur ; Y. Shu, Auteur Année de publication : 2014 Article en page(s) : p. 175-183 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites
Etain
Etat fondu (matériaux)
Interfaces (Sciences physiques)
Mélange
Polyéthylène haute densité
Taille des particulesIndex. décimale : 668.9 Polymères Résumé : In our study, liquid tin (Sn) was mixed with molten polyethylene using an internal mixer; the interfacial tension between the liquid Sn and molten polyethylene was measured using the deformed drop retraction method. The results showed that liquid Sn separated when the Sn content was higher than approximately 2?% by volume because of the interfacial tension of up to 167?mN/m and the 106-fold viscosity difference between the liquid Sn and the molten polyethylene. When Sn separation did not occur, the effects of the mixing time and rotary speed on the degree of mixing and the Sn particle size were analyzed using thermogravimetric analysis and scanning electron microscopy. The results showed that the effects of mixing time and rotary speed on the degree of mixing and Sn particle size can be combined as the impact of specific energy input. With increasing specific energy input, the degree of mixing initially increased and subsequently remained constant, while the Sn particle size initially decreased and subsequently remained constant. The refinement of the dispersed phase was completed with a low specific energy input, but the homogenization of the dispersed phase required a higher specific energy input to achieve completion, revealing the relationship between distributive mixing and dispersive mixing. Note de contenu : - EXPERIMENTS : Raw materials - Internal mixing of Sn and HDPE - Determination of the interfacial between liquid Sn and molten HDPE - Evaluation of the homogeneity of the composites - Morphologies and sizes of the metal phase in the composites
- RESULTS AND DISCUSSION : Aggregation and separation of liquid Sn - Relationship of the degree of mixing and Sn particle size with processing conditionsDOI : 10.3139/217.2635 En ligne : https://drive.google.com/file/d/1-PqBCAezE0A2WzEL0_iHa1HCJ8s1wO2q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21309
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 2 (05/2014) . - p. 175-183[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16222 - Périodique Bibliothèque principale Documentaires Disponible The reinforcement of leather split by constructing an interpenetrating network via in-situ recombination of PVA / Xu Weixing in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
[article]
Titre : The reinforcement of leather split by constructing an interpenetrating network via in-situ recombination of PVA Type de document : texte imprimé Auteurs : Xu Weixing, Auteur ; Hui Zeng, Auteur ; Jianfei Zhou, Auteur ; Ya-Nan Wang, Auteur ; Bi Shi, Auteur Année de publication : 2018 Article en page(s) : p. 255-263 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites
Composites -- Propriétés mécaniques
Composites -- Propriétés thermiques
Cuirs et peaux
Matériaux -- Renforcement
Polyacétate de vinyle
Polymères -- Propriétés mécaniques
Potentiométrie
Réseaux polymèresIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to improve the quality and utilization of leather split, the strength of leather split should be enhanced. The in-situ polymerization of some monomers has proven to be an effective approach in constructing an interpenetrating network (IPN) in split and increasing its strength. But this method is almost unacceptable in practice because of the use of volatile monomers and organic solvents. In this study, a new method to construct the IPN structure in split, in-situ recombination, was developed. Polyvinyl alcohol (PVA) was used as compositing agent, and its molecular structure and modification conditions were optimized. Scanning electron microscope (SEM), potentiometric analyzer and differential scanning calorimeter (DSC) were used to characterize the mechanism of in-situ recombination. The results suggested that PVA with an average polymerization degree of 500 and an average alcoholysis degree of 88% could enhance the strength of split most effectively through compositing reaction of PVA and split in 5% PVA aqueous solution for 120 min under 80°C and pH 7.0. The IPN structure was successfully constructed between PVA and collagen fibers via in-situ recombination. A method to enhance the strengths of leather split with practical application was established. Note de contenu : - EXPERIMENTAL : Materials and equipment - Preparation of PVA/split composites - Measurements and instruments
- RESULTS AND DISCUSSION : Effect of compositing time on mechanical properties of PVA/split composites - Effect of polymerization degree and alcoholysis degree of PVA on mechanical properties of PVA/split composites - Effect of PVA concentration on mechanical properties of PVA/split composites - Morphology analysis of PVA/split composite - Potentiometric analysis of PVA/split composite - Thermal behavior of PVA/split compositeEn ligne : https://drive.google.com/file/d/1k-il4rNBlYeS-mLyrSM8DIC2KCqz1VkM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30842
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Code-barres Cote Support Localisation Section Disponibilité 20115 - Périodique Bibliothèque principale Documentaires Disponible The role of nanoclay partitioning and fibril formation on dyeability of blend nanocomposite fibres / Ahmad Bigdeli in COLORATION TECHNOLOGY, Vol. 129, N° 4 (08/2013)
[article]
Titre : The role of nanoclay partitioning and fibril formation on dyeability of blend nanocomposite fibres Type de document : texte imprimé Auteurs : Ahmad Bigdeli, Auteur ; Hossein Nazockdast, Auteur ; Abosaeed Rashidi, Auteur ; Mohammad Esmail Yazdanshenas, Auteur Année de publication : 2013 Article en page(s) : p. 289–297 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Composites
Compoundage
Extrudeuse bi-vis
Extrusion filage
Fibrillation
Matériaux hybrides
Microscopie électronique à balayage
Microscopie électronique en transmission
Nanoparticules
Polybutylène téréphtalate
Polypropylène
Rhéologie
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The aim of the present work was to study the effect of microstructure and microfibril formation on dyeability of polypropylene/poly(butylene terephthalate)/organoclay blend nanocomposite fibres. The blend nanocomposite samples with the same blend ratio but varying in organoclay content were prepared via melt compounding by using a co-rotating twin screw extruder. The microfibrillar morphology and nanoclay partitioning were studied using scanning electron microscopy and transmission electron microscopy together with rheological results. The presence of nanoclay in the form of tactoids in the polypropylene matrix accelerated the dye sorption but much greater ultimate dye uptake could be achieved for the sample in which the major part of the platelets were preferentially located inside the poly(butylene terephthalate) fibrils. Although increasing the organoclay concentration increased the ultimate dye uptake, it limited the fibril formation at higher organoclay concentration. The utilisation of a compatibiliser was found to have an enhancing effect on ultimate dye uptake. This could be explained in terms of the interfacial role of the compatibiliser in improving microfibril formation as well as partitioning a fraction of nanoclay platelets inside the polypropylene matrix. DOI : 10.1111/cote.12038 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12038/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19042
in COLORATION TECHNOLOGY > Vol. 129, N° 4 (08/2013) . - p. 289–297[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15394 - Périodique Bibliothèque principale Documentaires Disponible Thermal conductivity of polypropylene composites with combined boron nitride fillers / W. Cheewawuttipong in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)
[article]
Titre : Thermal conductivity of polypropylene composites with combined boron nitride fillers Type de document : texte imprimé Auteurs : W. Cheewawuttipong, Auteur ; D. Fuoka, Auteur ; Shuichi Tanoue, Auteur ; Hideyuki Uematsu, Auteur ; Y. Iemoto, Auteur Année de publication : 2014 Article en page(s) : p. 214-220 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Composites
Nitrure de boreLe nitrure de bore est un composé chimique du bore et de l'azote, de formule chimique brute BN (nombre égal d'atomes de chaque élément). Le nitrure de bore est isoélectronique avec le carbone et, comme ce dernier, existe sous plusieurs formes polymorphiques, dont l'une est analogue au diamant et l'autre au graphite. La forme diamant est l'un des matériaux les plus durs connus et la forme graphite est un lubrifiant apprécié. De plus, ces deux polymorphes possèdent des propriétés d'absorption radar.
Polypropylène
Taille des particules
ThermocinétiqueIndex. décimale : 668.9 Polymères Résumé : We prepared polypropylene (PP) filled with boron nitride (BN) particles by melt compounding. The effects of filler content, particle size, and combined filler on the thermal conductivity of PP/BN composites were investigated. The results indicated that the thermal conductivities depend on the content and BN particle size. The good dispersion of BN particles of intermediate size in PP matrices led to a higher thermal conductivity than that of PP matrices containing small and large BN particles in which the agglomeration of BN particles was observed. The incorporation of BN particles of two different sizes could enhance the thermal conductivities of PP composites relative to those of composites containing BN particles of a single size at the same total content. A PP composite containing 50?wt% combined fillers with a mixture of BN particles measuring 45??m and 10??m at a weight ratio 1?:?4 showed the highest thermal conductivity in this experiment. Furthermore, several models for predicting the thermal conductivity of the composites were studied. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PP/BN composites - Testing
- RESULTS AND DISCUSSION : Thermal conductivity of composites containing BN particles of a single size - The morphologies of PP composites containing BN particles of a single size - Prediction of thermal conductivity of the composites by using calculation model - Thermal conductivity of PP composites with combinations of BN particles of different sizes - The morphologies of PP composites with combinations of BN particles of different sizes - Dynamic mechanical analysisDOI : 10.3139/217.2833 En ligne : https://drive.google.com/file/d/1cDIqmzts43VE9D2GwxtryafINnAPh0I1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21315
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Code-barres Cote Support Localisation Section Disponibilité 16222 - Périodique Bibliothèque principale Documentaires Disponible Thermally-conductive composites / Carl Zweben in JEC COMPOSITES MAGAZINE, N° 46 (01-02/2009)
[article]
Titre : Thermally-conductive composites Type de document : texte imprimé Auteurs : Carl Zweben, Auteur Année de publication : 2009 Article en page(s) : p. 61-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites
Polymères
ThermocinétiqueIndex. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : High thermal conductivity is a key requirement for many applications. While most traditional composites have low thermal conductivities, a growing number of thermally-conductive composites and applications are being developed, including structures, mechanical systems, and electronic and photonic packaging. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5958
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