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Stimuli-responsive polyurethane-urea polymer for protective coatings and dampening material / Anastassija Wittmer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
[article]
Titre : Stimuli-responsive polyurethane-urea polymer for protective coatings and dampening material Type de document : texte imprimé Auteurs : Anastassija Wittmer, Auteur ; Andreas Brinkmann, Auteur ; Volkmar Stenzel, Auteur ; Katharina Koschek, Auteur Année de publication : 2019 Article en page(s) : p. 189-197 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amortissement (mécanique)
Analyse mécanique dynamique
Anticorrosifs
Anticorrosion
Copolymère uréthane-urée
Matériaux sensibles aux stimulis
Mesure
Revêtement autoréparant
Revêtements -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Intrinsic self-healing coatings have been drawing more and more attention over recent years. A self-healing coating that is able to maintain its original appearance and performance after damage is attractive for a huge scope of applications. This article reports the synthesis of a polyurethane-urea coating with 1-(2-aminoethyl)-imidazolidin-2-one (UDETA) units showing temperature- and moisture-triggered self-healing. Calorimetric and spectroscopic analyses give insight into the self-healing mechanism showing that the absorbed water is able to disturb inter- and intramolecular hydrogen bonds of the polymer chains and decrease the glass transition temperature of the polymer. Temperature-mediated self-healing can be performed from 80 up to 200°C. Aside from self-healing, the molecular dynamics in the polyurethane-urea polymer prove to be beneficial for damping applications as confirmed by dynamic mechanical analysis. Thus, the polymer system features properties that are useful for two different applications, namely in coatings with self-healing and corrosion protective properties and in dampening materials. Note de contenu : - EXPERIMENTAL : Materials - Polymer preparation - Measurements
- RESULTS AND DISCUSSION : Evaluation of self-healing - Application casesDOI : 10.1007/s11998-018-0114-z En ligne : https://link.springer.com/article/10.1007/s11998-018-0114-z Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31984
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 189-197[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible Structure and properties of polyolefin based elastic fiber XLA / Ni Wang in CHEMICAL FIBERS INTERNATIONAL, Vol. 63, N° 1 (03/2013)
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Titre : Structure and properties of polyolefin based elastic fiber XLA Type de document : texte imprimé Auteurs : Ni Wang, Auteur ; Xiting Chen, Auteur ; Liu Zhaolin, Auteur ; Jianyong Yu, Auteur Année de publication : 2013 Article en page(s) : p. 26-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Diffractométrie de rayons X
Elastomères
Fibres textiles -- Propriétés mécaniques
Fibres textiles synthétiques
Fibres textiles synthétiques -- Analyse
Fourier, Spectroscopie infrarouge à transformée de
PolyoléfinesUne polyoléfine, parfois appelée polyalcène, désigne un polymère aliphatique saturé, synthétique, issu de la polymérisation d'une oléfine (aussi appelée un alcène) telle l'éthylène et ses dérivés.
La formule générale est -(CH2-CRR')n-, où R et R' peuvent être l'atome d'hydrogène (H) ou les radicaux alkyle apolaires CH3, CH2-CH3, CH2-CH(CH3)2. Il existe aussi des mousses isolantes souples faites à partir de polyoléfine (pour l'isolation thermique de tuyaux plastiques par exemple).
PRESENTATION : Les polyoléfines forment la plus importante famille de matières plastiques, avec quatre représentants (PP, HDPE, LDPE, LLDPE) parmi les plastiques de grande consommation. La consommation mondiale de ces quatre polymères est évaluée à plus de 60 millions de tonnes en 20001.
Seul un petit nombre de polyoléfines a atteint le niveau industriel :
les polyoléfines thermoplastiques semi-cristallines : polyéthylène (PE), polypropylène (PP), polyméthylpentène (PMP), polybutène-1 (PB-1) ;
les polyoléfines élastomères : polyisobutylène (PIB), éthylène-propylène (EPR ou EPM) et éthylène-propylène-diène monomère (EPDM).
PROPRIETES : En raison de leur nature paraffinique, les polyoléfines sont hydrophobes et possèdent en général une grande inertie chimique (aux solvants, acides, bases, etc.). Ces matériaux ont donc une qualité alimentaire. Le collage est très difficile (la surface est particulièrement inerte, des traitements de surface spéciaux sont nécessaires).
Cependant, ils sont sensibles à l'action des UV, et résistent très peu à l'inflammation car leur indice limite d'oxygène est faible (exemple : ILO ~ 17 pour le polyéthylène).
Leur densité est très faible [0,83 (cas du PMP) < d < 0,95] : ils flottent dans l'eau.
Ils sont opaques, sauf le PMP (transparent).Index. décimale : 677.4 Textiles artificiels Résumé : The polyolefin based elastic fiber XLA is an elastic fiber developed by Dow Chemical Company relaunched by XLAance Fibre Italia, Terragona/Spain. In this paper, the structure of this fiber was investigated by FT-IR spectra, X-Ray diffraction and DTMA analysis, respectively. Meanwhile, its elastic properties were also measured and compared with those of the polyurethane. Results indicate that the FT-IR spectrum of XLA coincides with the structure of polyolefin elastomers. The crystallinity degree is 22% which is lower than those of other olefin polymers. The glass transition temperature is about -32.33°C according to the peak of tangent delta in DMTA. With the increase of the maximum strain, the elastic recovery ration of XLA decreases under the condition of 5 stretched cycles. The fibers have much lower elastic recovery ratio than the polyurethane, especially at large maximum strain. Note de contenu : - EXPERIMENTAL : Materials - Measurements
- RESULTS AND DISCUSSION : FT-IR analysis - X-ray diffraction analysis - DMTA analysis - Elastic propertiesEn ligne : https://drive.google.com/file/d/1Ea8kogcRsUd7eqFY864UoFbuoaMT52z7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18295
in CHEMICAL FIBERS INTERNATIONAL > Vol. 63, N° 1 (03/2013) . - p. 26-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14982 - Périodique Bibliothèque principale Documentaires Disponible A study of non-isothermal kinetic reaction for vulcanization of chloride butyl rubber via phenol formaldehyde resin / X. R. He in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
[article]
Titre : A study of non-isothermal kinetic reaction for vulcanization of chloride butyl rubber via phenol formaldehyde resin Type de document : texte imprimé Auteurs : X. R. He, Auteur ; H. Yu, Auteur ; Y. Q. Rong, Auteur ; R. Zhang, Auteur ; G. S. Huang, Auteur Année de publication : 2014 Article en page(s) : p. 342-349 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Caoutchouc -- Propriétés mécaniques
Caoutchouc butyle chloré
Caractérisation
Formaldéhyde
Mélange
Phénoplastes
Réticulation (polymérisation)
Thermocinétique
VulcanisationIndex. décimale : 668.4 Plastiques, vinyles Résumé : Brominated tert octyl phenol formaldehyde resin (PR) is an important cross linker for chlorinated butyl rubber (CIIR). There are two competitive reactions in the vulcanization process of CIIR, the cross-linking reaction and the self-poly-condensation reaction of PR. The cross-linking density was measured by the equilibrium swelling method. The results showed: with the increasing of PR content, the cross-linking density increased when it was less than 10 phr, and decreased when the PR content exceeded 10 phr. The kinetics equation of cross-linking reaction and the self-poly-condensation reaction was obtained by non-isothermal DSC method. The results showed that the concentration index n2 of PR in the cross-linking reaction was far less than the concentration index n3 of PR in the self-poly-condensation reaction. The self-poly-condensation reaction was more sensitive to the concentration of PR. This explained that the cross-linking density was out of proportion with the cross linker PR content. The mechanical properties and the dynamic mechanical properties were investigated by the universal testing machine and the dynamic mechanical performance analysis (DMA), respectively. The results showed that the cross-linking density had a great impact on the mechanical properties and the dynamic mechanical properties, and the variation trend of the cross-linking density was further confirmed by the corresponding variation of the properties. When the PR content was 5 phr, the CIIR vulcanizates had better mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Mixing and vulcanization - Preparation of PR blend - Testing and characterization
- RESULTS AND DISCUSSION : The effect of PR content on cross-linking - The research of non-isothermal kinetic equation - The effect of PR content on mechanical properties of vulcanizates - Dynamic mechanical properties of CIIR vulcanizatesDOI : 10.3139/217.2722 En ligne : https://drive.google.com/file/d/1sAVFBUSz3CyRTxKyUuWbcp5qkAGZKqaE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21731
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 3 (07/2014) . - p. 342-349[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16404 - Périodique Bibliothèque principale Documentaires Disponible Styrene/isoprene/styrene thermoplastic elastomer prepared by anionic bulk polymerization in a twin-screw extruder / J.-M. Wang in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
[article]
Titre : Styrene/isoprene/styrene thermoplastic elastomer prepared by anionic bulk polymerization in a twin-screw extruder Type de document : texte imprimé Auteurs : J.-M. Wang, Auteur ; X.-Y. Yuan, Auteur ; D. Shan, Auteur ; A. Zheng, Auteur Année de publication : 2015 Article en page(s) : p. 44-50 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Chromatographie sur gel
Copolymère styrène isoprène styrène
Copolymères -- Synthèse
Elastomères thermoplastiques
Elastomères thermoplastiques -- Extrusion
Essais dynamiques
Microscopie électronique en transmission
Microstructures -- Analyse
Polyaddition
Résonance magnétique nucléaireIndex. décimale : 668.9 Polymères Résumé : In this study, a styrene/isoprene/styrene (SIS) triblock copolymer was synthesized in an intermeshing, co-rotating, twin-screw extruder. N-butyl lithium was used as the initiator. The styrene and isoprene monomer as well as 1,2-dibromoethane were sequentially added into the extruder. The weight content of isoprene in this copolymer was above 60%. Gel permeation chromatography (GPC) results showed that the polystyrene in the copolymer chains was mainly comprised of only one long block. Dynamic mechanical analysis (DMA) and transmission electron microscopy (TEM) showed that the polystyrene phase transferred from larger numbers of small microdomains to a continuous aggregation after the coupling reaction. As a result, the tensile stress and ultimate elongation was significantly improved, similar to the commercial product. Traditionally, SIS has only been synthesized by solution polymerization. The present work offers the capacity to synthesize it with very little or no solvent. This method fits the environmentally friendly trend. Note de contenu : - EXPERIMENTAL : Materials and equipment - Polymerization - Processing of the samples - Oxidative degradation of the copolymer - Gel permeation chromatography (GPC) - Proton Nuclear Magnetic Resonance (H-NMR) - Dynamical Mechanical Analysis (DMA) - Transmission Electron Microscopy (TEM) - Tensile Stress Test
- RESULTS AND DISCUSSION : Microstructure analysis of bulk polymerized SIS - GPC analysis of bulk polymerized SIS - TEM of S/I copolymers - DMA analysis of bulk polymerized SIS - Stress-strain behaviorDOI : 10.3139/217.2884 En ligne : https://drive.google.com/file/d/1sP-EWSIq1qUlVSvgS6sv4RLQlzB0gmDX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23421
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 1 (03/2015) . - p. 44-50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17016 - Périodique Bibliothèque principale Documentaires Disponible Styrene/isoprene triblock copolymers for diaper applications / S. Giordano in ADHESIVES AGE, Vol. 37, N° 12 (11/1994)
[article]
Titre : Styrene/isoprene triblock copolymers for diaper applications Type de document : texte imprimé Auteurs : S. Giordano, Auteur ; C. Parodi, Auteur ; A. Riva, Auteur ; L. Vitalini Sacconi, Auteur Année de publication : 1994 Article en page(s) : p. 32-38 Note générale : Bibliogr Langues : Américain (ame) Catégories : Adhésifs thermofusibles
Analyse mécanique dynamique
Copolymère styrène isoprène
Copolymères séquencés
Rhéologie
Tackifiant (adhésifs)Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Six stryene/isoprene triblock copolymers have been designed for use in hot melt formulations for diaper applications. This article characterizes the materials via dynamic mechanical analysis and traditional testing methods, and examines correlations among adhesive technological properties. Note de contenu : - EXPERIMENTAL MATERIALS : Block copolymers - Tackifying resins and other components
- TRADITIONAL MEASUREMENTS
- DMA
- DYNAMIC-MECHANICAL PROPERTIES OF RAW POLYMERS
- DYNAMIC-MECHANICAL PROPERTIES OF HOT MELT FORMULATIONS
- MELT VISCOSITY
- ADHESIVE AND COHESIVE PROPERTIESEn ligne : https://drive.google.com/file/d/14vzOOiyPLP11rPiWefhkaccsGgqRByV6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20812
in ADHESIVES AGE > Vol. 37, N° 12 (11/1994) . - p. 32-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001045 - Périodique Bibliothèque principale Documentaires Disponible Surface improvement on water and oil affinities and absorption rate of PVA/Tung oil-coated paperboard and fiberboard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
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PermalinkSynthesis and characterization of UV-curing epoxy acrylate coatings modified with organically modified rectorite / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
PermalinkSynthesis and mechanical properties of polyacrylic acid resin retanning agent / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)
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PermalinkThe influence of vulcanization agents on vulcanization kinetics of chloride butyl rubber / X. R. He in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)
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PermalinkUsing DMA and UV-Vis spectroscopy to predict the performance of wood coatings in outdoor use / F. Bulian in SURFACE COATINGS INTERNATIONAL, Vol. 94, N° 5 (10/2011)
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