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Developments in polymer architecture and design applicable to surface coatings / S. Perrier in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B4 (12/2004)
[article]
Titre : Developments in polymer architecture and design applicable to surface coatings Type de document : texte imprimé Auteurs : S. Perrier, Auteur Année de publication : 2004 Article en page(s) : p. 235-239 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Copolymères greffés
Copolymères séquencés
Emballages
Encre
Pigments
Polyaddition
Polymérisation par transfert de chaîne réversible par addition fragmentationLa polymérisation radicalaire contrôlée par transfert de chaîne réversible par addition-fragmentation (en anglais Reversible Addition-Fragmentation Chain Transfer (RAFT)) est une technique de polymérisation radicalaire contrôlée.
Au même titre que la polymérisation radicalaire contrôlée par transfert d'atome (en anglais Atom Transfert Radical Polymerization (ATRP)) et la polymérisation radicalaire en présence de nitroxydes (en anglais Nitroxide Mediated Polymerization (NMP)), la polymérisation de type RAFT permet de synthétiser des polymères d'architecture contrôlée (polymères à blocs, étoiles, peignes, etc) de faible polydispersité et de haute fonctionnalité. Les applications de ces polymères sont, parmi d'autres, l'encapsulation de principes actifs de médicaments, la production de revêtements et peintures de nouvelles génération, la microfluidique, les tensioactifs, les adhésifs et les membranes.
Revêtements organiques
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : In order to improve existing polymeric materials, or to design new polymer-based products, one needs to be able to control the polymeric chains. Historically, ionic living and group transfer polymerisations have allowed the design of polymeric architectures with predictable molecular weights and narrow molecular-weight distributions. However, these methods are difficult to undertake as they demand complex experimental conditions. Recently, living radical polymerisation (LRP) has been reported as an efficient living polymerisation process, based on free radical polymerisation chemistry. The wide range of monomers which have been successfully polymerised, the ease of scaling up a reaction, and the high tolerance to functional groups makes it the most suitable process to obtain well-defined architectures (eg polymers with well-known degrees of polymerisation, molecular-weight distribution, end functionalities, chain architectures and composition). LRP is more cost-effective and easier to manipulate than other existing living polymerisation methods, and is therefore the most viable process for industrial development. This paper presents the recent developments in this technique with potential for use in the surface coatings industry. Note de contenu : - Near monodispersed polymers : Lower VOC with better viscosity - Cheaper materials - Pigment dispersant
- End-functional polymers
- Block copolymers
- Comb (co)polymers
- Graft (co)polymers
- Other polymeric architectures
- Novel micro/nano structures from LRPDOI : 10.1007/BF02699670 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699670.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5442
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B4 (12/2004) . - p. 235-239[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000718 - Périodique Bibliothèque principale Documentaires Disponible Developments in silicone based fouling-release (FR) and anti-fouling (AF) coatings for marine application : a review / S. Kowshikraman in PAINTINDIA, Vol. LXV, N° 5 (05/2015)
[article]
Titre : Developments in silicone based fouling-release (FR) and anti-fouling (AF) coatings for marine application : a review Type de document : texte imprimé Auteurs : S. Kowshikraman, Auteur ; Mishra Ankit, Auteur ; Belhekar Neha, Auteur Année de publication : 2015 Article en page(s) : p. 59-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères séquencés
Marines (peinture)
Revêtements antisalissures:Peinture antisalissures
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 667.9 Revêtements et enduits Résumé : With emerging regulations and restrictions concerning the protection of environment and human health a great transformation is taking place in the coating industry for marine application with research focused on reducing the VOC content and the use of carcinogenic and toxic components in the coating. This review focuses on recent developments in non-toxic antifouling coating for marine application based on silicones and thus summarizes potential substitutes for the conventionally used eroding paints which effect the ecological system. Coating systems like polyorganosilazane—silicone, PDMS/PMMA copolymer, amphiphilic surface coating based on PEO-silane tether segments and PDMS and Zwitterionic siloxane-polyurethane are discussed in this article. The Zwitterionic siloxane- polyurethane system mentioned includes poly(SBMA)-block-PDMS-block-poly(SBMA) triblock polymer incorporated in a polyurethane formulation and carboxybetaine functionalized polysiloxanes (PDMS-g-CB). The characterization and properties of the coating systems are discussed in detail along with comparison and reasoning for their potential use as anti-fou ling or fouling-release coating for marine application. Note de contenu : - Coating based on polyorganosilazane and silicone polymer
- Discussion
- Coatings based on zwitterionic-siloxane polymer
- PDMS/PMMA block copolymer based antifouling coating
- Coating based on hyperbranched fluoropolymer-polymethylsiloxane-poly(ethylene glycol) crosslinked terpolymer
- Foul resistant PEO/silanes modified silicone coatingEn ligne : https://drive.google.com/file/d/1OeCHmZ7LMUtry30HVcLwtqAdTVOyb_-O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24461
in PAINTINDIA > Vol. LXV, N° 5 (05/2015) . - p. 59-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17393 - Périodique Bibliothèque principale Documentaires Disponible Double-hydrophilic block copolymer as an effective and environmentally friendly inhibitor for phosphate and carbonate scales in cooling water systems / Lei Ling in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 50, N° 1 (01-02/2013)
[article]
Titre : Double-hydrophilic block copolymer as an effective and environmentally friendly inhibitor for phosphate and carbonate scales in cooling water systems Type de document : texte imprimé Auteurs : Lei Ling, Auteur ; Guangqing Liu, Auteur ; Jingyi Huang, Auteur ; Huchuan Wang, Auteur ; Yuming Zhou, Auteur ; Qingzhao Yao, Auteur ; Ke Cao, Auteur ; Yahui Liu, Auteur ; Ying Tu, Auteur ; Xingkai Zhou, Auteur ; Wei Sun, Auteur ; Wendao Wu, Auteur Année de publication : 2013 Article en page(s) : p. 14-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Copolymères séquencés
Hydrophilie
Inhibiteurs (chimie)
Phosphate de calcium
Polyéthylène glycol d'AllyloxyIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : In this paper, a series of linear-dendritic block copolymers allyloxy poly(ethylene glycol) polyglycerol (APEG-PG-(OH)n) copolymer, was synthesized by anionic polymerization of glycerol using allyloxy poly(ethylene glycol) (APEG). The polymers were characterized by FT-IR and 1H NMR. The polymers were tested as novel environment-friendly inhibitors for industrial cooling water circulation. The performance of AA/APEG-PG-(OH)n on inhibition of calcium phosphate and calcium carbonate precipitation was studied by static scale inhibition tests. It was shown that AA/APEG-PG-(OH)n exhibited excellent ability to control inorganic minerals, with approximately 99% calcium phosphate inhibition and 85% calcium carbonate inhibition at levels of 4 and 10 mg/L AA/APEG-PG-(OH)n, respectively. The effect on formation of calcium phosphate and calcium carbonate was investigated with combination of scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) analysis, respectively. Note de contenu : - EXPERIMENTAL : Materials and characterization - Measurements - Synthesis - Precipitation conditions
- RESULTS AND DISCUSSION : Characterization of APEG-PG-(OH)n - Characterization of AA/APEG-PG-(OH)n - Effect of inhibitor on calcium phosphate scales - Effect on inhibitor on calcium carbonates scales - Inhibition mechanism toward calcium phosphate and calcium carbonate scales -DOI : 10.3139/113.110225 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17144
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 50, N° 1 (01-02/2013) . - p. 14-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14537 - Périodique Bibliothèque principale Documentaires Disponible Effect of random and block copolypropylenes on structure and properties of uniaxially and biaxially oriented PP films / S. H. Tabatabaei in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 1 (03/2011)
[article]
Titre : Effect of random and block copolypropylenes on structure and properties of uniaxially and biaxially oriented PP films Type de document : texte imprimé Auteurs : S. H. Tabatabaei, Auteur ; Abdellah Ajji, Auteur ; H. Ghasemi, Auteur Année de publication : 2011 Article en page(s) : p. 82-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Copolymères séquencés
Films plastiques -- Propriétés mécaniques
Microscopie en lumière polarisée
Polypropylène
RhéologieIndex. décimale : 668.9 Polymères Résumé : Cast films of two linear polypropylenes (PP) having different molecular weights and their blends with 5, 20, and 40 wt.% random and block copolymers were prepared. The produced cast films were uniaxially and biaxially hot drawn at T = 155ºC using a biaxial stretcher and the changes in structure and morphology were examined and related to barrier, mechanical, haze, and tear properties. The crystallinity and crystal size distribution of the films were studied using differential scanning calorimetry (DSC). The uniaxial drawing generated a highly oriented fibrillar structure, resulting in an increase in the melting point of the films. A significant effect of the random copolymer on the size of crystallites was found using DSC, which was also confirmed from polarized optical microscopy (POM). Compared to the neat homopolymers, finer and numerous spherulites were observed for the blends. During drawing, the applied loads in the machine and transverse directions (MD and TD, respectively) were recorded and related to breaking up and tilting of the crystal lamellae. Adding the random copolymer appreciably decreased the haze of the films and hence drastically improved the clarity. Tensile properties and tear resistance of the cast films in MD and TD were evaluated. The addition of the random copolymer slightly reduced the Young modulus and tensile strength, but increased the elongation at break. A slight increase in the oxygen transmission rate (OTR) of the biaxially drawn films were observed by adding the copolymer. DOI : 10.3139/217.2404 En ligne : https://drive.google.com/file/d/1Wu4KRz4nPjaAKjV4g9qq6NTTQtVcnsce/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11053
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Code-barres Cote Support Localisation Section Disponibilité 012871 - Périodique Bibliothèque principale Documentaires Disponible Effect of the mandrel rotation speed and inner wall cooling Rate on the performance and structure of polypropylene block-copolymer pipe / R. Han in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 5 (11/2013)
[article]
Titre : Effect of the mandrel rotation speed and inner wall cooling Rate on the performance and structure of polypropylene block-copolymer pipe Type de document : texte imprimé Auteurs : R. Han, Auteur ; M. Nie, Auteur ; S.-B. Bai, Auteur ; Q. Wang, Auteur Année de publication : 2013 Article en page(s) : p. 496-505 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères séquencés
Matières plastiques -- Extrusion
Matières plastiques -- Propriétés mécaniques
Mouvement rotatoire
Polypropylène
TubesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Polypropylene block-copolymer (PP-B) pipes were prepared using a self-designed rotational extrusion processing system. The experimental results showed that though the crystal morphology in the prepared PP-B pipes did not change compared to conventional extrusion, the molecular chains in amorphous region apparently deviated from the axial direction. As a result, in comparison with the conventional extrusion pipes, the mechanical properties in hoop direction and the resistance to crack growth of rotation extrusion PP-B pipes were greatly improved. Furthermore, both the two mechanical properties improved monotonously with increasing mandrel rotation speed and inner wall cooling rate. DOI : 10.3139/217.2761 En ligne : https://drive.google.com/file/d/1yZG4O8sqa8HgUJ1z4PuX3wGPBhKoOPIP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19896
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