Electrografting of mixed organophosphonic monolayers for SI-ATRP of 2-methacryloyloxyethyl phosphorylcholine / Bastien Arrotin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1121-1132 Titre : Electrografting of mixed organophosphonic monolayers for SI-ATRP of 2-methacryloyloxyethyl phosphorylcholine Type de document : texte imprimé Auteurs : Bastien Arrotin, Auteur ; Jean-Marc Noël, Auteur ; Joseph Delhalle, Auteur ; Laetitia Mespouille, Auteur ; Zineb Mekhalif, Auteur Année de publication : 2019 Article en page(s) : p. 1121-1132 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages Greffage (chimie) Nitinol Le nickel-titane, connu aussi sous le nom de Nitinol est un alliage de nickel et de titane, dans lequel ces deux éléments sont approximativement présents dans les mêmes pourcentages. Poly(2-méthacryloyloxyéthyl phosphorylcholine) Polymérisation radicalaire par transfert d'atome Revêtement monocouche Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Nitinol (NiTi), one of the most important alloys for biomedical applications, is still hampered by its surface nickel inclusions, making it sensitive to pitting corrosion and leading therefore to the release of potentially carcinogenic Ni2+ ions. In this work, we assess the impact of the combination of electrografted mixed self-assembled monolayers (SAMs) on NiTi followed by a polymer coating formed by surface-initiated atom transfer radical polymerization (SI-ATRP). The molecular ratio of 11-(2-bromoisobutyrate)-undecyl-1-phosphonic acid (BUPA) to 11-decylphosphonic acid (C10P) on the electroassisted elaboration of the (BUPA/C10P)-NiTi-SAMs has been optimized. A small amount of BUPA (20%) appears to be the most promising condition, as it provides an efficient corrosion resistance and promotes the SI-ATRP of 2-methacryloyloxyethyl methacrylate (MPC). This confers to the surface hydrophilic properties and corrosion resistance close to those NiTi-SAMs when long polymerization times are used (≥ 6 h). Note de contenu : - EXPERIMENTAL SECTION : Chemicals - Nitinol substrates preparation - Electroassisted grafting of mixed initiating monolayers on nitinol - SI-ATRP of MPC - Substrate characterization - RESULTS AND DISCUSSION : Electroassisted grafting BUPA/C10P mixed monolayers - Surface-initiated atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine on BUPA/C10P-NiTi DOI : 10.1007/s11998-019-00186-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00186-6.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32867 [article]

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Grafting of functional monomers through atom transfer radical polymerisation (ATRP) / Ega Shivakumar in PAINTINDIA, Vol. LXV, N° 11 (11/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 11 (11/2015) . - p. 62-70 Titre : Grafting of functional monomers through atom transfer radical polymerisation (ATRP) Type de document : texte imprimé Auteurs : Ega Shivakumar, Auteur ; Vinayak Chopde, Auteur ; Kumar Ghosh Swapan, Auteur ; Sisir Mandal, Auteur ; Rohit Karande, Auteur Année de publication : 2015 Article en page(s) : p. 62-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyseurs au cuivre Copolymères greffés Ligands Monomères Polymères -- Synthèse Polymérisation Polymérisation radicalaire par transfert d'atome Index. décimale : 667.9 Revêtements et enduits Résumé : The pre-polymer (ATRP macro-initiator) was prepared by the copolymerisation of methyl methacrylate (MMA), 2-ethyl hexylacrylate (2-EHA) and ATRP monomer (synthesized in the laboratory) via conventional free radical polymerisation technique. The pre-polymer contains a halide functionality, which was further used for surface grafting of styrene and hydroxyethyl methacrylate via ATRP polymerisation. The effect of the catalyst and temperature on the rate of polymerisation was investigated. The percentage conversion and molecular weight was increased with increase in catalyst concentration and temperature. The synthesized graft copolymers were dissolved in butyl acetate catalyst dosage of 5000 ppm with temperature at 90°C. The synthesized products were then characterized by differential scanning calorimetry (DSC), gel permeation chromatography (GPC) and infra-red (IR) spectroscopy techniques. Complete conversion of monomer was confirmed from gas chromatography (GC) analysis. The variation in Tg for the graft copolymer confirmed the grafting of desired polymer onto the pre-polymer. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Synthesis of acrylic resin - Synthesis of ATRP monomer - Synthesis of pre-polymer (ATRP macro-initiator) - Synthesis of graf copolymer through ATRP - RESULTS & DISCUSSIONS : Effect of catalyst on ATRP monomer conversion - Effect of molecular weight on grafting - Effect of temperature on styrene conversion through grafting - Effect of concentration on styrene conversion through grafting - Glass transition temperature (Tg) - FTIR spectra En ligne : https://drive.google.com/file/d/1kRwgGVWdJZiErOGePRSoi9ebjt8JNZ0Z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25266 [article]

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Methyl acrylate polymers as suitable materials for the conservation of stone : performance improvements through atom transfer radical polymerization / Barbara Sacchi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 5 (09/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 5 (09/2013) . - p. 649-657 Titre : Methyl acrylate polymers as suitable materials for the conservation of stone : performance improvements through atom transfer radical polymerization Type de document : texte imprimé Auteurs : Barbara Sacchi, Auteur ; Laura Giannini, Auteur ; Marco Frediani, Auteur ; Luca Rosi, Auteur ; Piero Frediani, Auteur Année de publication : 2013 Article en page(s) : p. 649-657 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymérisation Fluoropolymères Polyacrylate de méthyle Polymérisation radicalaire par transfert d'atome Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic polymers are a suitable category of materials for application in building stone conservation mainly due to their peculiarities (i.e., easy to apply, low cost, good adhesive and cohesive properties, and high solubility in many organic solvents). The performances of polyacrylates have been improved through atom transfer radical polymerization (ATRP). Polymers were obtained with low polydispersity, controlled molecular weight, and showing better stability to UV irradiation than products obtained by radical polymerization. New poly(methyl acrylate-co-perfluoropolyethers) were also prepared via ATRP, using a perfluoropolyether derivative as initiator, showing the possibility of synthesizing copolymers between acrylates and perfluoropolyethers in common solvents. Protective efficiency of poly(methyl acrylate-co-perfluoropolyether) was close to that of commercially available products. Note de contenu : - EXPERIMENTAL : Instruments - Solvents and reagents - Synthesis of the monomers - Synthesis of polymers - Stone material - Performances of the polymers applied on stone materials - RESULTS AND DISCUSSION : Synthesis and characterization of polymers - Stability of polymers - Protective performances of polymers DOI : 10.1007/s11998-013-9495-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9495-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19799 [article]

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Novel dispersants / Dave Haddleton in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4485 (02/2005)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4485 (02/2005) . - p. 42-44 Titre : Novel dispersants Type de document : texte imprimé Auteurs : Dave Haddleton, Auteur ; Andrew Steward, Auteur Année de publication : 2005 Article en page(s) : p. 42-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Agents dispersants (chimie) -- Synthèse Caoutchouc Copolymères séquencés Méthacrylates Monomères Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Polyéthylène glycol Polymérisation Polymérisation radicalaire par transfert d'atome Revêtements -- Additifs:Peinture -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : The authors explain why the drive to reduce VOC content of formulations and the need to increase loads while reducing resin levels is necessitating the development of improved dispersants. The combination of the constant drive to reduce volatile organic compound (VOC) content of formulations and the need to increase pigments loads while reducing resin levels in pigment concentrates, is necessitating the development of improved dispersants. A great deal of effort has centred on new polymeric dispersants with novel polymer architecture and composition of both the pigment anchoring groups and the stabilising moieties. Traditionally, free radical polymerisation (FRP) has been used to polymerise functional monomers which are required to make good pigment dispersants. FRP is robust with tolerance towards many impurities such as oxygen and heteroatoms. However, FRP has limitations arising from non-selectivity, i.e. little control over polymer topology or architecture and limited control over molecular weight. It has beenf ound that block copolymers are generally more efficient dispersants than their random copolymer analogues, therefore, new polymerisation techniques are being investigated to develop a new range of dispersants to meet the increasingly demanding requirements of modern pigment dispersants. Transition metal mediated living radical polymerisation (TMM-LR°) also known as atom transfer radical polymerisation (ATRP) allows a level of control un paralleled in polymer synthesis enabling the formation f well-defined polymer structures including block, grafs and hyperbranched copolymers as well as controlling alpha therminal functionality. Unlike many other living polymerisation techniques TMM-LRP is robust and tolerant to most impurities with the exception of acids. This makes the technology applicable to a wide range of monomers inlcuding, but no limited to, alkyl methacrylate, diethylaminoethylmethacrylate, PEG methacrylate, glycerol methacrylate, hydroxyethyl methacrylate, protected acid functional methacrylates and many styrenics. Note de contenu : - polymerisation technology - Dispersant synthesis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27663 [article]

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Synthesis of electroactive tetraaniline-based acrylic polyol by atom transfer radical polymerization for anticorrosive coating application / Gunawant P. Lokhande in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 6 (11/2018) . - p. 1293-1309 Titre : Synthesis of electroactive tetraaniline-based acrylic polyol by atom transfer radical polymerization for anticorrosive coating application Type de document : texte imprimé Auteurs : Gunawant P. Lokhande, Auteur ; Ramanand N. Jagtap, Auteur Année de publication : 2018 Article en page(s) : p. 1293-1309 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Conducteurs organiques Copolymères séquencés Polyacrylate de butyle Polymères -- Synthèse Polymérisation radicalaire par transfert d'atome Polyméthacrylate de glycidyle Polyols Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, block copolymers of butyl acrylate and glycidyl methacrylate (GMA) having molecular weights 10,000 Da were synthesized with varied GMA block lengths by 10%, 20%, and 30% using atom transfer radical polymerization. The synthesized copolymers were further reacted with tetraaniline to formulate conductive polyol and further characterized by mass spectroscopy, UV–visible spectroscopy, 1HNMR, and FTIR. The block copolymers formed were evaluated by gel permeation chromatography, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry, and nuclear magnetic resonance (NMR) techniques for structural elucidation. These polyols were formed with 10, 20, and 30 wt% with isocyanate (HDI N-3300) to form a polyurethane. The effect of concentration of conducting polyol on anticorrosive coating performance properties, namely mechanical and optical properties, was further studied. The anticorrosive performance was evaluated by salt spray test and electrochemical impedance spectroscopy. Note de contenu : - EXPERIMENTAL : Materials - Methods - CHARACTERIZATION : Physicochemical analysis of copolymer - UV-visible spectroscopy - Mass spectroscopy - Fourier transform infrared spectroscopy - 1H Nuclear magnetic resonance spectroscopy - GPC - Differential scanning calorimetry - Thermogravimetric analysis - Electrochemical impedance spectroscopy (EIS) - Electrical conductivity measurement - Gloss of paint - Water absorption behavior - Mechanical properties of coating - RESULTS AND DISCUSSION : Physicochemical analysis - FTIR - Mass spectroscopy of tetraaniline - UV-visible spectroscopy of tetraaniline and polyol (MPBGCP) - HNMR spectroscopy - Molecular weight determination by gel permeation chromatography - Differential scanning calorimetric analysis - Anticorrosive properties - Conductivity measurements - GLOSS OF COATINGS : Water absorption - Mechanical properties of coatings DOI : 10.1007/s11998-018-0077-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0077-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31344 [article]

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