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The relationship between the structure of hyper-branched polymer and its effect on high exhaust chrome in reduced chrome tanning / Yao Qi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 5 (05/2017)
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Titre : The relationship between the structure of hyper-branched polymer and its effect on high exhaust chrome in reduced chrome tanning Type de document : texte imprimé Auteurs : Yao Qi, Auteur ; Chenying Li, Auteur ; Henghui Huang, Auteur ; Hualin Chen, Auteur ; Bailing Liu, Auteur Année de publication : 2017 Article en page(s) : p. 153-161 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chrome trivalent -- Absorption
Cuirs et peaux -- Analyse
Groupement carboxyle
Oligomères
Poids moléculaires
Polydispersité
Polymères -- Synthèse
Polymères ramifiés
Tannage au chrome
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Hyper-branched polymer (HBP) has been widely used as pretanning, tanning auxiliary and retanning agent in chrome tanning industry. However the effect of the structure of HBP including the degree of branching (DB) and molecular weight (Mw), on chrome tanning has seldom been studied. In this study a series of carboxyl-terminated hyper-branched oligomer (HBP) with different DB and Mw have been prepared and characterized by GPC and 1H-NMR for determining their molecular weight and its distribution, as well the DB. The effect of DB and Mw on the chrome uptake and shrinkage temperature (Ts) of hide was investigated. Experimental results showed that the chrome uptake was affected by both DB and Mw of developed HBP. HBP that possesses high DB and the Mw closed to 2000 Da, has endowed the obtained leather with higher Ts and chrome uptake. Moreover, the leather tanned with 3% chrome and 1.5% HBP possesses similar properties to the traditional tanning process using 6-8% chrome. Therefore, the carboxyl-terminated HBP presents a potential application as a tanning auxiliary in reduced chrome tanning due to it’s improving the absorption of chrome. Note de contenu : - MATERIALS AND METHODS : Chemicals and materials - Synthesis of the carboxyl-terminated hyper-branched oligomer - Chrome tanning
- INSTRUMENTS AND MEASUREMENTS : Gel permeation chromatography (GPC) - Differential scanning calorimetry (DSC) - FT-IR spectra - H NMR - The acid value - Shrinkage temperature - Chrome uptake - Charactereization of HBP-x - FTIR of the HBP-1 - HNMR of the HBP-1 - Estimation of the DB - Molecular weights and polydispersity - Chrome uptake - Effect of DB on the chrome uptake - Effect of Mw on the chrome uptake - Reduced tanning with HBPEn ligne : https://drive.google.com/file/d/1E-yNeSRgfe2iItWez_p55B8SmbCRWwzG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28551
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 5 (05/2017) . - p. 153-161[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18894 - Périodique Bibliothèque principale Documentaires Disponible The use of comb-type copolymers to sustain the surface bactericidal effect of highly water-soluble cationic biocides / J. J. Gerrard in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B2 (05/2005)
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Titre : The use of comb-type copolymers to sustain the surface bactericidal effect of highly water-soluble cationic biocides Type de document : texte imprimé Auteurs : J. J. Gerrard, Auteur ; J. Moore, Auteur ; J. A. Annable, Auteur Année de publication : 2005 Article en page(s) : p. 83-91 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Chimie analytique
Copolymères
Formulation (Génie chimique)
Hydrophobie
Polyacryliques
Polyaddition
Polymères ramifiés
Spectroscopie ultravioletteIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of free radical comb-type acrylic copolymers was prepared in a solution incorporating charged and/or neutral stabilising species on the backbone. The polymer solutions were formulated with cationic biocides to give physically stable formulations with a long shelf life. Furthermore, through the control of polymer architecture of both the side-chain and the backbone, hydrophobicity, a controlled release of a biocide could be achieved. This technology has resulted in the design of temporary coatings demonstrating a sustained surface disinfecting effect. In laboratory trials, coated surfaces with polymeric/biocidal formulations continued to show a disinfection effect after several washes. Note de contenu : - EXPERIMENTAL : Preparation of comb copolymers - Synthesis of comb copolymers - Formulation of comb copolymers with bactericide PHMB
- TEST PROTOCOLS : Acid Red 52 dye test (test protocol 1) - Preparation of comb copolymers and PHMB formulations (test protocol 2) - Coating for formulations (test protocol 3) - Release of PHMB from a dried coated formulation (test protocol 4) - Calibration of PHMB using Lambda 900 UV/VIS/NIR spectrometer (test protocol 5) - Calculation of minimum inhibitory concentrations (test protocol 6) - Residual bactericidal activity (test protocol 7) - Repeat inoculation test (test protocol 8à
- RESULTS AND DISCUSSION : Release of PHMB from formulationsusing test protocol N° 4 - Optimisation of PHMB loading - Residual bactericidal activity using test protocol N° 7DOI : 10.1007/BF02699538 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699538.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5420
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B2 (05/2005) . - p. 83-91[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001966 - Périodique Bibliothèque principale Documentaires Disponible 002343 - Périodique Bibliothèque principale Documentaires Disponible Thermotropic, side-chain ordered polymeric coatings : gas permeability switching via a thermal stimulus / James Goetz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)
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Titre : Thermotropic, side-chain ordered polymeric coatings : gas permeability switching via a thermal stimulus Type de document : texte imprimé Auteurs : James Goetz, Auteur ; Sergei Nazarenko, Auteur Année de publication : 2014 Article en page(s) : p. 123-139 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Cristaux liquides thermotropes
Fluoropolymères
Gaz
Membranes (technologie)
Perméabilité
Perméation
Polyacrylates
Polymères ramifiésIndex. décimale : 667.9 Revêtements et enduits Résumé : Rapid access to large areas of stimuli-responsive materials is attractive in the field of membrane science for purification systems and molecular valves. Thermotropic liquid crystalline (LC) systems show sharp property changes through the smectic–LC transition induced by temperature. Comparison of similar amorphous and liquid crystalline systems allows for the elucidation of the characteristics of the LC phase. Lightly crosslinked C6F13 and C8F17 perfluorinated side-chain acrylate networks were UV cured as thin films resulting in amorphous and thermotropic liquid crystalline thin films, respectively. Thermal and morphological characterization indicates a restructuring of the liquid crystalline phase through the isotropic transition giving rise to an increase in transport and free volume properties. The amorphous film showed no dramatic change in transport or free volume properties. Note de contenu : - EXPERIMENTAL : Material - Characterization
- RESULTS AND DISCUSSION : Solid state structure - Transport and free volume behaviorDOI : 10.1007/s11998-013-9518-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9518-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21147
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 2 (03/2014) . - p. 123-139[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16196 - Périodique Bibliothèque principale Documentaires Disponible Two-component high-solid polyurethane coating systems based on soy polyols / Vijay M. Mannari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 2 (04/2006)
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Titre : Two-component high-solid polyurethane coating systems based on soy polyols Type de document : texte imprimé Auteurs : Vijay M. Mannari, Auteur ; John L. Massingill, Auteur Année de publication : 2006 Article en page(s) : p. 151-157 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
Composés organiques volatils
Dureté (matériaux)
Haut extrait sec
Polymères ramifiés
Polyols
Polyuréthanes
Résistance à l'abrasion
Revêtements -- Propriétés mécaniques
Soja et constituants
UrethanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Soybean oil based polyols-soybean oil phosphate ester polyols (SOPEPs)-having varying hydroxyl content and viscosity were prepared as low cost and low-VOC polyols for coatings applications. These SOPEPs were used as the hydroxyl component of "two-component polyurethane (2K-PU)" coating compositions and their film properties were studied. Blends of commercial polyester polyol and SOPEP in varying proportions were also used to formulate PU coatings. Their film properties were studied and compared. We found that SOPEP can be used as the sole hydroxyl component or as the reactive diluent for polyester polyols in 2K-PU coating systems. SOPEP is derived from a relatively inexpensive and renewable resource and the use of SOPEP can substantially reduce VOC and cost ofPU coating formulations. DOI : 10.1007/s11998-006-0018-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0018-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3706
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 2 (04/2006) . - p. 151-157[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004551 - Périodique Bibliothèque principale Documentaires Disponible UV curable PSAs augment existing adhesive technologies / Tom Kauffman in ADHESIVES AGE, Vol. 41, N° 7 (07/1998)
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Titre : UV curable PSAs augment existing adhesive technologies Type de document : texte imprimé Auteurs : Tom Kauffman, Auteur ; Jim Chappell, Auteur ; Marga Acevedo, Auteur ; Mark Mitry, Auteur Année de publication : 1998 Article en page(s) : p. 29-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Adhésifs en phase solvant
Adhésifs sensibles à la pression
Copolymère ester acrylique
Monomères
Polymères ramifiés
Réseaux neuronaux (informatique)
Réticulation (polymérisation)
Tackifiant (adhésifs)Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Solvent-based, water-based and hot melt adhesives have a long history of success for pressure sensitive adhesive (PSA) tape and label applications. These technologies are seemingly well entrenched with adequate performance and low cost. Several market trends, however, are opening up new opportunities for UV curable PSAs.
In contrast to solvent-based adhesives, UV curable PSAs contain no fugitive solvent and are therefore VOC compliant. In contrast to hot melts, UV curable adhesives offer a crosslinked network upon cure and therefore are capable of higher heat resistance and plasticizer resistance. Finally, in contrast to water-based technologies, UV curable PSAs offer immediate cure and can be formulated to exhibit much better blushing resistance upon exposure to water. The lack of a need for drying capability is also a significant advantage of UV curable adhesives over water-based technology.Note de contenu : - Market drivers
- In-house coating of PSAs
- Unique applications
- Low VOC
- UV curable warm melt adhesives
- Room temperature applied UV PSAs
- Experimental design techniques
- Use of neural networks
- Development of room temperature applied PSAsEn ligne : https://drive.google.com/file/d/16Xy1FKRQ4JkQJB4aunNXyziUJg8fznaA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20312
in ADHESIVES AGE > Vol. 41, N° 7 (07/1998) . - p. 29-33[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001435 - Périodique Bibliothèque principale Documentaires Exclu du prêt Water dispersible hot melt adhesive raw material / Richard A. Miller in ADHESIVES AGE, Vol. 38, N° 13 (12/1995)
PermalinkWater-dispersible raw materials for adhesives / Richard A. Miller in ADHESIVE TECHNOLOGY, Vol. 15, N° 3 (09/1998)
PermalinkWater-dispersible raw materials for hot melt adhesives / Richard A. Miller in ADHESIVES AGE, Vol. 39, N° 12 (11/1996)
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