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Reactive blending of thermoplastic polyurethane and polypropylene / R. Jaruttrakool in INTERNATIONAL POLYMER PROCESSING, Vol. XXV, N° 5 (11/2010)
[article]
Titre : Reactive blending of thermoplastic polyurethane and polypropylene Type de document : texte imprimé Auteurs : R. Jaruttrakool, Auteur ; S. Tanpichai, Auteur ; D. Pentrakoon, Auteur ; P. Potiyaraj, Auteur Année de publication : 2010 Article en page(s) : p. 327-333 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Analyse thermique
Anhydride maléique
Extrudeuse bi-vis
Microscopie électronique à balayage
Polypropylène
Polyuréthanes
Thermogravimétrie
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 668.9 Polymères Résumé : In this research, reactive blending of thermoplastic polyurethane (TPU) and polypropylene (PP) was studied. Grafting of maleic anhydride (MAH) onto TPU/PP blends was performed by a twin-screw extruder in the presence of dicumyl peroxide (DCP). Mechanical properties and morphology of the blends were investigated by tensile testing and scanning electron microscopy (SEM), respectively. Thermal properties of the blends were characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The obtained results were compared with those of the uncompatibilized blends and the blends compatibilized with a commercial maleic anhydride grafted polypropylene (PP-g-MA). The results from the uncompatibilized blends clearly indicate that the TPU and PP are immiscible resulting in undesirable properties of the blends. These properties were improved significantly when TPU and PP were reactive-blended in the presence of MAH and DCP. When comparing with the blends compatibilized with PP-g-MA, the blends prepared by the reactive blending technique possessed better mechanical properties. DOI : 10.3139/217.2299 En ligne : https://drive.google.com/file/d/1lZ47o3X3uRP2jR8clZvio_QsOlvDoN8D/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10250
in INTERNATIONAL POLYMER PROCESSING > Vol. XXV, N° 5 (11/2010) . - p. 327-333[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012592 - Périodique Bibliothèque principale Documentaires Disponible Relationships between crystallization behavior and application properties of chemically coupled PAI-PTFE coatings / Michaela Genan-Smolka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Relationships between crystallization behavior and application properties of chemically coupled PAI-PTFE coatings Type de document : texte imprimé Auteurs : Michaela Genan-Smolka, Auteur ; Dieter Jehnichen, Auteur ; Mikhail Malanin, Auteur ; Thomas Schmidt, Auteur ; Anne Marschner, Auteur ; Antje Schneider, Auteur ; Michael Göbel, Auteur Année de publication : 2024 Article en page(s) : p. 623-654 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Alliages polymères
Caractérisation
Extrusion réactive
Laque et laquage
Métaux -- Revêtements protecteurs
Polyamide-imide
Polymères -- Propriétés thermiques
Polytétrafluoréthylène
Revêtements organiques
Structure cristalline (solide)Index. décimale : 667.9 Revêtements et enduits Résumé : Poly(tetrafluoroethylene) (PTFE) is well known for its very low friction coefficient and thus widely used for antifriction applications, e.g., sliding lacquers, for many years. Because of the high wear rate and cold flow of the original polymer, PTFE is usually added in higher amounts to other polymer matrices as a lubricant. However, the incompatibility of PTFE requires lots of efforts to perform a homogeneous breaking down of agglomerates and particle distribution as well as dispersion stabilization of the physical mixtures during application and curing. PTFE can be functionalized by high energy irradiation and subsequently compatibilized with a polymer matrix by reactive extrusion resulting in chemical bonding of both polymers via suitable reactive groups. In this manner, poly(amide imide) (PAI) was coupled to γ-radiation modified PTFE micro-powder prior to the dispersion procedure. This study deals with the thermal and crystallization behavior of the PTFE lubricant in chemical bonded (cb) PAI-PTFEcb compound thin layers in comparison with those of the plain radiation modified PTFE depending on the cooling rate by DSC, Flash-DSC and WAXS. A morphological characterization of the extrudate as well as the coating gives information about the fragmentation and distribution of the PTFE phase in the PAI matrix. Furthermore, mechanical and surface properties of sliding lacquer films were analyzed after application on steel substrates by varying dry film thickness and curing. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials and material treatment - Characterization methods
- RESULTS AND DISCUSSION : Investigation of chemical bonding and PAI-PTFEcb morphology - Thermal behavior of the composite original polymer components - Thermal behavior of PAI-PTFEcb by defined slow cooling rates - Crystallization behavior by fast cooling -
X-ray measurements - Dispersion and film characterizationDOI : https://doi.org/10.1007/s11998-023-00845-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00845-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40782
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 623-654[article]Relaxation behavior of core-shell particles in PP/PMMA/PS ternary blends : The effects of composition, viscosity ratio and temperature / R. Berahman in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 4 (08/2018)
[article]
Titre : Relaxation behavior of core-shell particles in PP/PMMA/PS ternary blends : The effects of composition, viscosity ratio and temperature Type de document : texte imprimé Auteurs : R. Berahman, Auteur ; Mir Karim Razavi Aghjeh, Auteur ; M. Mehrabi Mazidi Année de publication : 2018 Article en page(s) : p. 553-563 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Phénomènes de relaxation (matériaux)
Polymères -- Effets de la température
Polystyrène
Rhéologie
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : The relaxation behavior of PMMA-PS core-shell particles in PP matrix was studied. The effects of composition and viscosity ratio of core and shell forming components on relaxation processes of PP/(PMMA+PS) 80/20 ternary blends were evaluated at three different temperatures (200, 225 and 250°C) and discussed. For the ternary blends containing low-viscosity PMMA (PP/L-PMMA/PS), the shape relaxation time, λ, sharply reduced at first with PS content and then increased after passing through a minimum with further increase in the PS content. The corresponding relaxation strength, λ.H(λ), increased suddenly at first and then monotonically decreased upon further incorporation of PS. The changes of λ and λ.H(λ) with PS content were attributed to a change in the interfacial energy (shell formation) and average viscosity of the dispersed composite droplets upon progressive addition of PS into PP/L-PMMA blend so that the minimum λ corresponding to the maximum λ.H(λ) was observed at shell completion composition with finest core-shell- particles (12 wt% of PS phase). The core-shell particles of all the ternary blends containing L-PMMA exhibited a shape relaxation at 200°C, while at the same temperature for the blends containing high-viscosity PMMA (H-PMMA) no shape relaxation peak was detected when the PS shell content was lower than 62 wt%. This was attributed to restriction effect of non-deformable H-PMMA core droplets, which led to no droplet relaxation. At higher PS contents, appearance of the shape relaxation peak was related to the relaxation of PS shell, suggesting that there is a critical shell thickness above which the relaxation behavior of core-shell droplets is dominated by the low-viscous PS shell. Increase in temperature from 200 to 250°C reduced the PS shell content corresponding to onset of deformation and accelerated the relaxation of composite droplets. Note de contenu : - EXPERIMENTAL : Materials - Blends preparation - Morphological observations - Rheological analysis
- RESULTS AND DISCUSSION : Phase morphology of PP/PMMA/PS ternary blends containing PMMAs of different viscosities - Relaxation phenomena - Effect of temperature on the relaxation phenomenaDOI : 10.3139/217.3551 En ligne : https://drive.google.com/file/d/11ujIzsFgKL5td4X4vWnCdjsZHNBIH_KA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30895
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Code-barres Cote Support Localisation Section Disponibilité 20077 - Périodique Bibliothèque principale Documentaires Disponible Reshaping adhesive and sealant formulation strategies / Ken Thomas in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 24, N° 10 (10/2017)
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Titre : Reshaping adhesive and sealant formulation strategies : A new organic/inorganic composite powder simultaneously simplifies formulas and improves product performance, manufacturing operations, and economics Type de document : texte imprimé Auteurs : Ken Thomas, Auteur Année de publication : 2017 Article en page(s) : p. 21-25 Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression
Adhésifs thermofusibles
Alliages polymères
Construction -- Matériaux
Elastomères
Formulation (Génie chimique)
Mastics thermofusiblesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Adhesive and sealant manufacturers and end users are always looking for a competitive edge. Faced with a bewildering number of formulation choices and risk/reward tradeoffs, they can end up getting left behind as technologies advance, or make a technical or business mistake if they are too aggressive. There are literally hundreds of raw materials to choose from, a long process to validate and verify new ingredients, and precious little time for internally driven product development projects. Note de contenu : - Product characterization
- Hot-melt pressure-sensitive adhesives
- Elastomer compounding
- Figure : Photomicrograph of the material
- Tables : 1. SARA/inorganic composition from product data sheet - 2. Tape property comparisons - 3. Power consumptionEn ligne : https://www.adhesivesmag.com/articles/95809-reshaping-adhesive-and-sealant-formu [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29206
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Code-barres Cote Support Localisation Section Disponibilité 19263 - Périodique Bibliothèque principale Documentaires Disponible Resin blend emulsion for user-friendly anti-frizz / Stella O'Neill in GLOBAL PERSONAL CARE, Vol. 22, N° 9 (10/2021)
[article]
Titre : Resin blend emulsion for user-friendly anti-frizz Type de document : texte imprimé Auteurs : Stella O'Neill, Auteur Année de publication : 2021 Article en page(s) : p. 54-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agent anti-frisottis
Alliages polymères
Cheveux -- Soins et hygiène
Cyclopentasiloxane
Emulsions
Ingrédients cosmétiques
Silicones -- Emploi en cosmétologie
TriméthylsiloxysilicateIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The purpose of this paper is to illustrate the development of a TMS resin blend emulsion, its extreme ease of formulation, regulatory compliance, and performance as an anti-frizz agent. The resin blend, Phenyltrimethicone (and) Trimethylsiloxysilicate, has proven to outperform the industry staple, Cyclopentasiloxane (and) Trimethylsiloxysilicate. The emulsion of the same blend maintains an equal level of performance as its non-emulsion resin blend counterpart, when tested for efficacy both as an anti-frizz agent and when formulated into an anti-frizz formulation. Note de contenu : - Where it all began : the resin blend
- Regulatory compliance & performance
- Room for improvement
- Manufacturing advantages of an emulsion
- Functional advantages of an emulsion
- The big test : Anti-frizz test method - Sample preparation
- Testing procedureTesting results - Discussion - What is next ?
- Fig. 1 : Evolution of a resin blend emulsion & its benefits
- Fig. 2 : Anti-frizz performance of the control vs. the resin blend-emulsion
- Fig. 3 : Anti-frizz performance over four-hour periodEn ligne : https://drive.google.com/file/d/1kVjicHcPOqPxTKFH-rCPEoo-wYTaxUKU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36893
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Code-barres Cote Support Localisation Section Disponibilité 22939 - Périodique Bibliothèque principale Documentaires Disponible Review on eco friendly green polymers from biobased materials : Current and future trends in biodegradable coating (Part 1) / R. Kanchana in PAINTINDIA, Vol. LXIX, N° 4 (04/2019)
PermalinkRheological and thermal characterization of polymer coatings : a case study / Menas S. Vratsanos in COATINGS TECH, Vol. 14, N° 7 (07/2017)
PermalinkRheological behavior of immiscible PS/PMMA blends during dynamic plasticating extrusion / W. H. Luo in INTERNATIONAL POLYMER PROCESSING, Vol. XXIII, N° 3 (07/2008)
PermalinkRheological properties of chlorinated poyethylene blended with low-cost grade natural rubber / P. Wongwitthayakool in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 1 (03/2009)
PermalinkRhéologie dans la zone de transition cristallisation / fusion : application à des copolymères / M. Aris-Brosou in RHEOLOGIE, Vol. 30 (12/2016)
PermalinkRhéologie dynamique de mélanges de polymères incompatibles / F. Prochazka in LES CAHIERS DE RHEOLOGIE, Vol. XVII, N° 1 (10/2000)
PermalinkRhéologie des suspensions. Rhéologie à toutes les échelles / Groupe Français de Rhéologie / Groupe Français de Rhéologie (2002)
PermalinkRheology of polypropylene/liquid crystalline polymer blends : effect of compatibilizer and silica / Reza Foudazi in APPLIED RHEOLOGY, Vol. 20, N° 1 (2010)
PermalinkScaling of rheological properties of hydrogels from polymer blends : PVA-K15M / A. El Ghzaoui in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 3 (10/1999)
PermalinkSealibility and seal characteristics of PE/EVA and PLA/PCL blends / Z. Najarzadeh in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 1 (03/2014)
PermalinkPermalinkSeparation of a nanofiller from tannery effluents / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 1 (01-02/2006)
PermalinkLa société Emac mise sur les compounds TPE / Jean-Philippe Forest in CAOUTCHOUCS & PLASTIQUES, N° 757 (03/1997)
PermalinkSome complementary scratch resistance characterization methods / Lan Mi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
PermalinkSpray applications. Part III. Assessment of viscosities at high shear rates and dynamic uniaxial extensional viscosities on fan nozzle air sprayability / Peter T. Elliott in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
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