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Effect of ZnO on mechanical and electrical properties of peroxide cured EPDM / Jelena Radosavljevic in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)
[article]
Titre : Effect of ZnO on mechanical and electrical properties of peroxide cured EPDM Type de document : texte imprimé Auteurs : Jelena Radosavljevic, Auteur ; L. Nikolic, Auteur ; M. Nikolic ; S. Ilic-Stojanovic Année de publication : 2018 Article en page(s) : p. 695-705 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Cables
Ethylène
Ethylène-propylène-diène monomère
Fourier, Spectroscopie infrarouge à transformée de
Matières plastiques -- Propriétés électriques
Matières plastiques -- Propriétés mécaniques
Oxyde de zinc
Réticulation (polymérisation)
RhéologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : This paper presents reduction of ZnO in EPDM formulations and its influence on efficiency of cable isolation by measuring cure behavior, electrical and mechanical properties before and after ageing. These experiments were performed on EPDM formulations by changing three key variables in formulation (concentration of ZnO, type of peroxide and content of ethylene in EPDM). The rheological characterization showed that replacing ZnO in EPDM with proper ethylene content (75 %) with the lower content of ZnO (5 phr) in the recipes, resulted in lower cure time and higher scorch time and higher crosslinking density, which was further supported by Fourier transform infrared spectroscopy (FTIR). Mechanical properties before aging (elongation at break, tensile strength, and hardness) are greater with smaller content of ZnO. The value of percentage change of the properties after aging at 135 °C for 7 days, indicates that recipe D (Perkadox 14/40 (Di (tert-butyl peroxy isopropyl) benzene (DTBPIB)) peroxide cured EPDM has the best performance at tensile strength, and elongation at break. What is more, recipe D, containing 5 phr of ZnO exhibits the desired electrical performance. The paper provides sufficient experimental background to indentify the key physical aspects associated with each of the instabilities that occur at higher amounts of ZnO in formulation, and this in turns provides insight into different occurrences of each instability and how they can be minimized by reduction of ZnO in EPDM mixture. Note de contenu : - MATERIALS AND METHODS : Materials - Properties of compounds - Cross linking characteristic measurement - Determination of mechanical properties - Dynamic mechanical analysis (DMA) - Determination of electrical properties - FTIR spectroscopy
- RESULTS AND DISCUSSION : FTIR method - Cure rheological characterization - Mechanical properties - Electrical propertiesDOI : 10.3139/217.3560 En ligne : https://www.degruyter.com/document/doi/10.3139/217.3560/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31409
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 5 (11/2018) . - p. 695-705[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20352 - Périodique Bibliothèque principale Documentaires Disponible Enhance slower relaxation process of poly(ethyl acrylate) through internal plasticization / X. R. He in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
[article]
Titre : Enhance slower relaxation process of poly(ethyl acrylate) through internal plasticization Type de document : texte imprimé Auteurs : X. R. He, Auteur ; H. Yu, Auteur ; R. Zhang, Auteur ; C.-H. Yang, Auteur Année de publication : 2014 Article en page(s) : p. 419-424 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Caoutchouc
Caractérisation
Composites à fibres de verre
Plastification
Polyacrylate d'éthyle
Relaxation moléculaire
Structure moléculaireIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this paper, we report a chemical way to resolve longer motions units in the glass-rubber transition region of poly (ethyl acrylate) (PEA), so called internal plasticization. The ethyl acrylate (EA) monomers were copolymerized with little amount of isoprene (IP) monomers. We propose that the single bonds adjunct to double bonds would have better flexible activity than usual single bonds, so the motion units located between two adjunct double bonds would be enhanced. The dynamic mechanical spectra of internally plasticized PEA (IPPEA) and PEA show that the tan ? of IPPEA is asymmetric, while the tan ? of PEA is symmetric. Furthermore, the results of 2D-DMAS show that the LSM, SRM and RM of IPPEA are located at 7 °C, 12 °C and 36 °C. The shoulder peak of tan ? of IPPEA at higher temperature side was confirmed that it contains sub-rouse mode (SRM) and rouse mode (RM). Thus, internal plasticization is an effective way to resolve modes above Tg. Note de contenu : - Materials - Preparation
- Characterization of molecular weight and polydispersity
- Characterization of molecular structure
- Dynamic mechanical analysis
- Two-dimensional analysisDOI : 10.3139/217.2882 En ligne : https://drive.google.com/file/d/1jgIOx1yPD2bjChffIfUDc7vllbL71YRd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21740
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Code-barres Cote Support Localisation Section Disponibilité 16404 - Périodique Bibliothèque principale Documentaires Disponible Ensuring the durability of adhesive-bonded assemblies / Jean-Pierre Jeandreau in JEC COMPOSITES MAGAZINE, N° 119 (03/2018)
[article]
Titre : Ensuring the durability of adhesive-bonded assemblies Type de document : texte imprimé Auteurs : Jean-Pierre Jeandreau, Auteur Année de publication : 2018 Article en page(s) : p. 77-81 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs -- Analyse
Adsorption
Analyse mécanique dynamique
Assemblages collés
Désorption
Diffusion (physique)
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Modélisation tridimensionnelleIndex. décimale : 668.4 Plastiques, vinyles Résumé : The life span of adhesive-bonded in operation can be predicted using accelerated ageing tests, thanks to an approach that associates the limitation of static or cyclic mechanical stresses with a kinetic and mechanistic study of the degradation of adhesive-bonded assemblies in warm, humid environments Note de contenu : - Phase to determine all the mechanical load on critical bond
- Preliminary design phase
- Characterization phase
- In situ characterization of the joint
- EF validation phase
- Fig. 1 : Structural design methodology
- Fig. 2 : Example of complete modelling of a part
- Fig. 3 : Examples of geometric optimization (increased contact surface)
- Fig. 4 : DMA analysis on an adhesive
- Fig. 5 : IR monitoring of an adhesive's chemical change
- Fig. 6 : Sorption/desorption curves : Fick's law ; Langmuir's (Carter's and Kibler's) law
- Fig. 7 : Modelling the diffusion of water in an adhesive linePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30388
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Code-barres Cote Support Localisation Section Disponibilité 19663 - Périodique Bibliothèque principale Documentaires Disponible EPDM-G-GMA toughening of straw/polypropylene composites : mechanical properties, thermal stability and rheological properties / Y. He in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 1 (03/2020)
[article]
Titre : EPDM-G-GMA toughening of straw/polypropylene composites : mechanical properties, thermal stability and rheological properties Type de document : texte imprimé Auteurs : Y. He, Auteur ; H.-M. Wu, Auteur ; J.-B. Guo, Auteur ; W.-D. He, Auteur ; Y. Zhou, Auteur Année de publication : 2020 Article en page(s) : p. 50-57 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Analyse thermique
Caractérisation
Composites à fibres végétales -- Propriétés mécaniques
Composites à fibres végétales -- Propriétés thermiques
Ethylène-propylène-diène monomère
Paille
Polypropylène
Rhéologie
Stabilité thermiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Natural fiber reinforced polymer composites have the advantages of low density, low cost and renewability. However, the inferior mechanical property restricts the application. In this work, EPDM-g-GMA has been added to straw/PP composites to improve the properties. The mechanical properties, thermal stability, crystallinity and melt viscosity have been invested. The results reveal that the mechanical properties of straw/PP/EPDM composites are improved remarkably and the impact strength more than doubles compared to straw/PP composites. Surface microstructure analysis reveals that the composite has good interfacial compatibility and dispersing performance. The maximum decomposition temperature, the melting enthalpy and crystallinity increased. The glass transition temperature and process ability are also improved by the addition of EPDM. Note de contenu : - EXPERIMENTAL : Materials and equipment - Composite preparation - Characterization
- RESULTS AND DISCUSSION : Mechanical properties - Morphology - Thermal stability - DSC analysis - DMA analysis - Rheological propertiesDOI : https://doi.org/10.3139/217.3836 En ligne : https://drive.google.com/file/d/1EMazIVfzrlz6IUYkZoQSVSzJL9eijUmu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33778
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Code-barres Cote Support Localisation Section Disponibilité 21578 - Périodique Bibliothèque principale Documentaires Disponible Evaluating oil characteristics / Anna Eriksson in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 17, N° 8 (08/2010)
[article]
Titre : Evaluating oil characteristics Type de document : texte imprimé Auteurs : Anna Eriksson, Auteur ; Anita Neau, Auteur ; Marika Rangstedt, Auteur Année de publication : 2010 Article en page(s) : p. 29-33 Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Colles:Adhésifs
Essais (technologie)
Essais d'adhésion
Essais dynamiques
Evaluation
Huile naphténique
Huile paraffinique
Huiles minérales -- Analyse
Produits pétroliers
ViscoélasticitéIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : When optimizing the performance of a styrenic block copolymer (SBC) pressure-sensitive adhesive (PSA), the focus often lies on the polymer and resin system, not on the oil that is used as a plasticizer. Since many adhesive formulations contain significant amounts of plasticizer, it can be valuable to evaluate the impact that different types of oil have on specific adhesive systems.
Mineral oil consists of a mixture of different hydrocarbon molecules with different chemical characteristics and, in addition to the molecular distribution, the oil can be more or less refined. All of these factors influence the performance of the oil in the adhesive.
Mineral oil that is used as an adhesive plasticizer originates from crude oil. Crude reserves can be found in a number of locations worldwide, and different crude sources result in different types of plasticizing oil, typically categorized as naphthenic or paraffinic. Depending on the molecular size distribution, the density of crude oil can be characterized from light (0.83 kg/dm3) to heavy (1.04 kg/dm3).Note de contenu : - FIGURES : 1. Viscoelastic properties as a function of temperature - 2. 180° peel adhesion, probe tack and SAFT - 3. Viscoelastic properties of the two prepared adhesives - 4. 180° peel adhesion, probe tack and SAFT of the two prepared adhesives
- TABLES : 1. Characteristics of the naphthenic and paraffinic technical white oils - 2. Characteristics of the hydrotreated and solvent-refined naphthenic oilsEn ligne : http://www.adhesivesmag.com/articles/89495-evaluating-oil-characteristics Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24369
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Code-barres Cote Support Localisation Section Disponibilité 012366 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of thermo-mechanical and wear behavior of short carbon fibre vinyl-ester filled homogenous and their functionally graded composites / B. Gangil in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
PermalinkFabrication and characterization of regenerated leather using chrome shavings as raw materials / Cuicui Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 5 (05/2017)
PermalinkFinding hidden structures / Kamakski Christopher in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2017)
PermalinkFunctional powder coatings via isocyanate-cured phenolics and benzoxazines / Weih Lee in COATINGS TECH, Vol. 17, N° 7 (07/2020)
PermalinkPermalinkGRP composite manufacturing optimization / David Beke in JEC COMPOSITES MAGAZINE, N° 119 (03/2018)
PermalinkIdentifying variations in cross-linked epoxies / Kiersten M. Smith in ADHESION - ADHESIVES + SEALANTS, Vol. 19, N° 3/2022 (2022)
PermalinkImpact of humid environment on structural and mechanical properties of biobased polylactide / A. Jaszkiewiez in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 4 (08/2015)
PermalinkInfluence de cycles de cuisson rapides sur le préimprégné aéronautique M21/T700 : suivi de polymérisation et propriétés mécaniques / Christophe Paris in MATERIAUX & TECHNIQUES, Vol. 100, N° 6/7 (2012)
PermalinkInfluence of dicumyl peroxide content on thermal and mechanical properties of polylactide / Piotr Rytlewski in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 5 (11/2011)
PermalinkInfluence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes / Ricardo Dossin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
PermalinkInfluence of rubber ratio and crosslinking agent on mechanical properties, crystallization and rheological behaviors of EPDM/PP thermoplastic elastomer / D.-H. Xu in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 4 (08/2019)
PermalinkInvestigating the long-term effects of immersion in salt solutions on the protective properties of bio-content polyurethane coatings / Douglas J. Mills in SURFACE COATINGS INTERNATIONAL, Vol. 103.4 (07-08/2020)
PermalinkInvestigation of cellulose nanocrystals (CNC) and cellulose nanofibers (CNF) as thermal barrier and strengthening agents in pigment-based paper coatings / Brenda Hutton-Prager in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
PermalinkInvestigations on blending and foaming behavior of styrehe-ethylene-butylene-styrene/polystyrene blends / R. Banerjee in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 4 (08/2017)
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