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Synthesis of a low-temperature self-crosslinking polyacrylate binder with a core-shell structure and its application in textile pigment printing / Xiaoyu Zhang in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)
[article]
Titre : Synthesis of a low-temperature self-crosslinking polyacrylate binder with a core-shell structure and its application in textile pigment printing Type de document : texte imprimé Auteurs : Xiaoyu Zhang, Auteur ; Yi Zhong, Auteur ; Xiaofen Sui ; Hong Xu ; Lingpin Zhang ; Zhiping Mao Année de publication : 2018 Article en page(s) : p. 299-307 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Auto-réticulation
Basses températures
Calorimétrie
Composés organiques -- Synthèse
Core-Shell
Couches minces -- Propriétés mécaniques
Essais dynamiques
Fourier, Spectroscopie infrarouge à transformée de
Impression sur étoffes
Latex
Liants
Méthacrylate d'acétoacétoxyéthyle
Microscopie électronique en transmission
Polyacrylates
Polymérisation en émulsion
ThermogravimétrieIndex. décimale : 667.3 Teinture et impression des tissus Résumé : A core‐shell acrylate binder for pigment printing containing acetoacetoxyethyl methacrylate (AAEM) in its shell was synthesised via semicontinuous seeded emulsion polymerisation. Self‐crosslinking occurs when curing at low temperatures without releasing formaldehyde. The core‐shell structure of the binder produces prints with a high block resistance and good film‐forming properties, which can avoid clogging the screens during the printing process and help to acquire a soft handle for textiles. Transmission electron microscopy (TEM) analysis demonstrated that the latex particle had a core‐shell structure of size ca. 120 nm. Differential scanning calorimetry (DSC) testing showed that polyacrylate (PA)‐modified AAEM exhibited two apparent Tg, providing further information about the formation of the soft core‐hard shell latex particles. Crosslinking degree tests, thermogravimetric analysis (TGA) and testing of the mechanical properties indicated that self‐crosslinking of AAEM took place at 100 °C, thereby enhancing the thermostability and mechanical properties of the latex films. The softer and non‐stick handle, excellent rubbing fastness, and higher K/S were obtained by further padding the printed fabric with amino silicon softener. The chemical structures of the surfaces of the printed fabrics were studied by Fourier Transform‐infrared (FTIR), and results confirmed that the crosslinking reaction between the amino of the softener and remaining acetoacetoxy functional group (AcAc) of AAEM had taken place. Note de contenu : - EXPERIMENTAL : Chemicals - Materials - Equipment - Synthesis of core-shell latex - Preparation of latex films - Preparation of latex film - Pigment printing - Measurement and analysis
- RESULTS AND DISCUSSION : Polymerisation - Morphology - Thermal analysis - Mechanical properties - Pigment printing - After treatmentDOI : 10.1111/cote.12339 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12339 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30925
in COLORATION TECHNOLOGY > Vol. 134, N° 4 (08/2018) . - p. 299-307[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20089 - Périodique Bibliothèque principale Documentaires Disponible The relationship of environmental subzero temperatures to components of footwear in simulated conditions of service / P. Bataille in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)
[article]
Titre : The relationship of environmental subzero temperatures to components of footwear in simulated conditions of service Type de document : texte imprimé Auteurs : P. Bataille, Auteur ; W. Smith, Auteur Année de publication : 1979 Article en page(s) : p. 301-307 Langues : Américain (ame) Catégories : Basses températures
Chaussures de ski
Cuirs et peaux -- Effets de la températureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This research sought to establish the actual temperatures attained by cross-country ski boots when they are evaluated under simulated conditions of use in a cold room. In tests conducted between +30° and -30°F, thermocouple readings in four different boot locations established temperature gradients between the boots and the test environment. The gradients between the vamp and the test environment after 40 min testing (average of + 10°F) were lower than those between the sole and the test environment (average of + 23°F). Readings from two other thermocouples placed inside the boots, one over the wearer's instep and one under the ball of his foot, showed much higher and more variable temperature gradients with the environment. At the subzero testing temperatures, the originally intended 2-hr tests were terminated after 40 min as the instep temperatures dropped below 50°F, causing the test subjects great discomfort. Note de contenu : - Testing equipment
- Location of the thermocouples
- Experimental procedure
- Results and discussion
- Table 1 : Temperature gradients after 40 minutesEn ligne : https://drive.google.com/file/d/1ssPVZT6taykPGM32FQ61_qquQK99SHjE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37223
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIV (Année 1979) . - p. 301-307[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008512 - Périodique Archives Documentaires Exclu du prêt Unique catalyst for low temperature cure epoxy powder coatings / Matthew Gadman in COATINGS TECH, Vol. 20, N° 1 (01-02/2023)
[article]
Titre : Unique catalyst for low temperature cure epoxy powder coatings Type de document : texte imprimé Auteurs : Matthew Gadman, Auteur ; John Florio, Auteur ; Matt C. Salvi, Auteur Année de publication : 2023 Article en page(s) : p. 18-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Basses températures
Bisphénol A
Blanc (couleur)
Catalyseurs
Epoxydes
Formulation (Génie chimique)
Homopolymères
Isocyanurate de triglycidyle
Méthacrylate de glycidyle
Polyacryliques
Réticulation (polymérisation)
Revêtements bi-composant
Revêtements organiques
Revêtements poudre
Rhéologie
Stabilité au stockage
ThermodurcissablesIndex. décimale : 667.9 Revêtements et enduits Résumé : Powder coatings continue to ba an attractive technology, primarily due to reduced volatile organic compound (VOC) emissions, ability to recycle overspray, and the exceptional film mechanical properties that can be attained. Despite the appeal, there are major drawbacks that need to be resolved for the technology to be effectively substitutable for liquid coatings. Note de contenu : - POWDER HISTORY AND TODAY'S MARKET : Launch of thermoset powder technology-innovation and low VOC initiatives : Circa 1950-1990 - Continued growth in a variety of markets-postmillennial - Environmentally aware consumers and VOC regulations : contemporary market
- A REVIEW OF THERMOSET POWDER TECHNOLOGIES : 1. Epoxy hybrids - 2. TGIC coatings (polyester) - 3. Acrylic systems - 4. Pure epoxy formulations
- CATALYSTS FOR EPOXY POWDER COATINGS :
- EXPERIMENTAL : Experiment I : Cure capabilities in acrylic/GMA-SB and pwoder formulations - Formulations, materials, and preparation of 2K SB acrylic/GMA and pwder acrylic/GMA - Rheology studies of 2K SB acrylic/GMA and pwder acrylic/GMA
- EXPERIMENT II : Accelerating epoxy homopolymerization : Formulations, materials, and preparation of catalyzed epoxy resins - Rheology studies of catalyzed BPA epoxy resins
- EXPERIMENT III : EVALUATION OF CATALYST PC IN FULLY FORMULATED WHITE EPOXY HYBRID POWDER : Formulations, materials, and preparation of white epoxy hybrid - Rheology studies of white epoxy hybrid - Film preparation of white epoxy hybrid - Film evaluation of white epoxy hybrid - Storage stability
- EXPERIMENT IV : EVALUATION OF CATALYST PC IN FULLY FORMULATED WHITE TGIC POWDER : Formulations, materials, and preparation of white TGIC formulation - Rheology studies of white TGIC formulation - Film preparation of white TGIC formulation - Film evaluation of white TGIC formulation - Storage stability
- Fig. 1 : Bisphenol-1 type epoxy resins, n ≥ 0
- Fig. 2 : Hydroxy ester formation via reaction of epoxides and carboxyl groups
- Fig. 3 : Triglycidylisocyanurate (TGIC) crosslinker
- Fig. 4 : Glycidyl methacrylate (GMA) monomer
- Fig. 5 : Dicyandiamide (DICY) crosslinker
- Fig. 6A : Initiating epoxy/amine polymerization
- Fig. 6B : Epoxy homopolymerization via catalysis by tertiary amine
- Fig. 6C : Deprotonation of hydroxyls and subsequent reactions with epoxy
- Fig. 6D : Amide formation via reaction of hydroxyl with nitrile
- Fig. 7A : Base catalysis : deprotonation of carboxylic acid*
- Fig. 7B : Base catalysis : interaction of conjugate acid with epoxide oygen
- Fig. 8 : Preparing powder disks using cylindrical pellet press
- Fig. 9 : Catalyst LC gel temperature in S B and powder acrylic/GMA system
- Fig. 10 : Log (lη*l) as a function of temperature : increasing dosages of catalyst LC
- Fig. 11 : Gel temperatures of white epoxy hybrid
- Fig. 12 : MEK resistance of white epoxy hybrids baked at various temperatures
- Fig. 13 : Impact resistance of white epoxy hybrid baked at various temperatures for 15 mn
- Fig. 14 : ΔΕ of catalyzed versus uncatalyzed white epoxy hybrid
- Fig. 15 : Pendulum and pencil hardness of white epoxy hybrid-bake temp./ 15 mn
- Fig. 16 : Log (lη*l) as a function of temperature-white TGIC formulation
- Fig. 17 : Impact resistance of white TGIC formluation - % active catalyst on TRS
- Fig. 18 : Gloss and color of white TGIC formulation-60° GU and b*
- Table 1 : Commonly used catalysts for epoxy reaction with carboxylic acids
- Table 2 : Physical properties of catalyst LC and catalyst PC
- Table 3 : 2K SB acrylic/GMA formulation
- Table 4 : Powder acrylic/GMA formulation
- Table 5A : Pre-experiment steps for SB oscillation tests
- Table 5B : Protocol for SB oscillation tests
- Table 6A : Pre-experiment steps for powder oscillation tests
- Table 6B : Protocol for powder oscillation tests
- Table 7 : Solventless BPA epoxy resin
- Table 8A : Pre-experiment steps for solventless epoxy oscillation tests
- Table 8B : Protocol for solventless oscillation tets
- Table 9 : Gel temp and onset temp of BPA epoxy resin with catalyst LC
- Table 10A : Breakdown of components of uncatalyzed white epoxy hybrid
- Table 10B : % breakdown of uncatalyzed and catalyzed white epoxy hybrid
- Table 11A : Pre-experiment steps for white epoxy hybrid oscillation tests
- Table 11B : Protocol for white epoxy hybrid oscillation tests
- Table 12 : Color values of white epoxy hybrid : L*, a*, b*
- Table 13 : Gloss properties of white epoxy hybrid-60° gloss units (GU)
- Table 14 : Uncatalyzed white TGIC formulationEn ligne : https://drive.google.com/file/d/1geR64CGC-_890pO1tV9GH-iQvIM2r4Eg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38714
in COATINGS TECH > Vol. 20, N° 1 (01-02/2023) . - p. 18-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23812 - Périodique Bibliothèque principale Documentaires Disponible Variations des propriétés des cuirs à semelle aux basses températures / L. de Pezzo in TECHNICUIR, (Années 1969-1970)
[article]
Titre : Variations des propriétés des cuirs à semelle aux basses températures Type de document : texte imprimé Auteurs : L. de Pezzo, Auteur ; U. Fiore, Auteur Année de publication : 1969 Article en page(s) : p. 129-132 Langues : Français (fre) Catégories : Basses températures
Cuirs et peaux -- Propriétés mécaniques
SemellesIndex. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1YNVYa11WxFfn2n0JwaS8MJg4tPXHAgPF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36009
in TECHNICUIR > (Années 1969-1970) . - p. 129-132[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22828 - Périodique Bibliothèque principale Documentaires Disponible Water-compatible, pH-sensitive, colour-changing polyurethane with low-temperature flexibility / Yong-Chan Chung in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)
[article]
Titre : Water-compatible, pH-sensitive, colour-changing polyurethane with low-temperature flexibility Type de document : texte imprimé Auteurs : Yong-Chan Chung, Auteur ; In-Hong Jung, Auteur ; Byoung Chul Chun, Auteur Année de publication : 2017 Article en page(s) : p. 252 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Basses températures
Compatibilité chimique et physique
Eau
Effet mémoire de forme
Fibres textiles -- Propriétés mécaniques
Greffage (chimie)
pH
Polymères -- Synthèse
Polyuréthanes
Propionique diméthylol, Acide
Stabilité thermiqueIndex. décimale : 667.3 Teinture et impression des tissus Résumé : A pH indicator (Bromocresol Green, Bromocresol Purple, or Thymol Blue) is grafted onto polyurethane (PU) using 2,2-dimethylolpropanoic acid (DMPA) to enhance water compatibility. The indicator-grafted, water-compatible PU is analysed for soft-segment thermal, tensile, and shape recovery properties, fast colour change depending on various pH conditions, and low-temperature flexibility. The PU surface becomes water compatible as DMPA content increases, and the characteristic UV-vis absorbance is observed for each grafted indicator. The PU series exhibits a sharp increase in tensile stress and crosslink density at low DMPA content, but a decrease with increased DMPA content. The glass transition temperature increases significantly with increased DMPA content. Shape recovery remains high, but shape retention sharply decreases after an indicator is grafted. The grafting of pH indicator onto PU improves the low-temperature flexibility and imparts an immediate colour change according to the solution pH and grafted indicator. Note de contenu : - EXPERIMENTAL : Materials - Polymer synthesis - Characterisation - Shape memory and low-temperature flexibility test
- RESULTS AND DISCUSSION : Synthesis and structure of PU - IR and thermal analysis - Crosslink density and tensile mechanical properties - Shape memory effect - pH indication and low-temperature stabilityDOI : 10.1111/cote.12275 En ligne : https://drive.google.com/file/d/1E7GPPiFYnqxU63YQvN_p0piCEs65Clvb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28649
in COLORATION TECHNOLOGY > Vol. 133, N° 3 (06/2017) . - p. 252[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18922 - Périodique Bibliothèque principale Documentaires Disponible