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Microwave synthesis - Magical tool for scientist & the future of resin synthesis / Savita S. Patil in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 53-61 Titre : Microwave synthesis - Magical tool for scientist & the future of resin synthesis Type de document : texte imprimé Auteurs : Savita S. Patil, Auteur Année de publication : 2013 Article en page(s) : p. 53-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Macromolécules -- Synthèse Micro-ondes Polyaddition Polymères Index. décimale : 667.9 Revêtements et enduits Résumé : High speed Microwave synthesis has attracted a considerable amount of attention in the last two decades. It represents a major breakthrough in synthetic chemistry methodology, a dramatic way in the chemical synthesis is performed & in the way it is perceived in the scientific community. Conventional heating, long known to be inefficient & timeconsum ing, has been recognized to be creatively limiting as well. Microwave synthesis give organic chemists more time to expand their scientific creativity, test new theories & develop new processes. Microwave enhanced chemistry represents a fundamental step forward in capabilities of synthetic chemists. Since it allows to run reactions (aster than ever before, with higher yields and reliably from mi I ligrams to much larger quantities, without the need of reaction re-optimization. The current study uses the Microwave Synthesis Technology to become the benchmark technology in conducting a number of experiments in shortest possible time, which is one of the obvious reasons associated with Microwave synthesis compared to Conventional heating technique. lnspired by this enormous success, the use of Microwave Technology studied for polymerization reactions. This is an overview of Micro molecular Rapid Communicator Technology and its Future use. Note de contenu : - MICROWAVE HEATING MECHANIM : Ionic polarization - Dipole rotation - WORKING PRINCIPLE - REACTIONS POSSIBLE BY MICROWAVE SYNTHESIS - DIFFICULT IS EASY NOW - GREEN CHEMISTRY - MICROWAVE SYNTHESIS : how the magical tools for scientist - CURRENT STATUS OF THIS EMERGING FIELD IN MARKET - LIMITATIONS En ligne : https://drive.google.com/file/d/1kMGAJm7n8ybD2yAVDkn7zpzNVz52ieYZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18974 [article]

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Anti-reflective smart coatings on glasses / Praful Sanjay Dahatonde in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 62-66 Titre : Anti-reflective smart coatings on glasses Type de document : texte imprimé Auteurs : Praful Sanjay Dahatonde, Auteur Année de publication : 2013 Article en page(s) : p. 62-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matériaux intelligents Polymérisation sous plasma Revêtement antireflet:Peinture antireflet Verre Index. décimale : 667.9 Revêtements et enduits Résumé : Our eyes are very complex organs. In order for our eyes to see, there must be light. Light rays reflect off of an object and enter the eye through the cornea. At the back of the eye the light is focused by the retina, and then it is converted into electric signais to be sent to the brain. Once the brain receives the signais, vision occurs. If the eye cannot properly focus an image it is said to have a refractive error. An eye doctor can determine the type of refractive error by a test cal led refraction. Correcting a refractive error is achieved by glasses, contacts or refractive surgery. A type of optical coating applied to the surface of lenses and other optical devices to reduce reflection. Anti-reflective coating (AR coating) is made of several layers of film metal oxides that are layered on the surface of the lens. Each layer is chemically engineered to block reflected light. This causes the intensity of the light reflected from the inner surface and the light reflected from the outer surface of the film to be nearly equal, canceling each other out and el iminating glare. Antireflection coatings are used to reduce reflection from surfaces. Whenever a ray of light moues from one medium to another (such as when light enters a sheet of glass alter travelling through air), some portion of the light is reflected from the surface (known as the interface) between the two media. AR was first developed to enhance and improve the view on high powered telescopes, microscopes and camera lenses. AR coating is composed of multiple layers of metal oxides applied to the front and sometimes the back surface of the lens. This layeringeffect reduces reflected light and aliows more I ight to betransmitted through the lens. What does this do for eyeglasses? First, it improves the appearance of your eyes to the outside world. AR coating makes the lenses appear almost invisible. It also vastly improves the cosmetic appearance of wearing the lenses by reducing internai reflections in the lens, making your lenses appear much thinner. Secondly, it improves the quality of your vision by reducing reflected lights. This cuts down on glare and halos around lights, and improves the quality of your vision at night and when us ing the computer in certain work environments. While AR coating is beneficial to everyone, it is found almost universally on high index lenses. High index lenses are made out of a type of plastic that can make your lenses much thinner than regular plastic lenses. However, to achieve th is thinness, sometimes the lens material can cause unwanted reflections. As a result, manufacturers who produce very high index lenses make AR a part of the complete lens price and do not separate the lens from the AR coating because they bel ieve a very high index lens should never be worn without an AR coating. Note de contenu : - EXPERIMENTAL : PLASMA POLYMERIZATION DEPOSITION SYSTEM - THEORY OF AR COATINGS - TYPES OF AR COATINGS : A) Index-matching - B) Single-layer interférence - C) Multi-layer interference - D) Absorbing - WHY CHOOSE AN ANTI-REFLECTION COATING ? - HOW DOES AN ANTI-REFLECTION COATING WORK ? : Tinted - Polarized - Photochromic - Mirrored En ligne : https://drive.google.com/file/d/1C0S7vtYpnVDIXciVtNXd6eamJ-uaBkTm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18975 [article]

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Corrosion process / P. K. Kamani in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 78-84 Titre : Corrosion process Type de document : texte imprimé Auteurs : P. K. Kamani, Auteur Année de publication : 2013 Article en page(s) : p. 78-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biodégradation Climat Corrosion Microorganismes Produits chimiques Température Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : In the first part, we studied about the losses and damages due to corrosion. There are basically three areas where the impact of corrosion is significant. The first one is economic, which define the enormous material loss resulting from various type of corrosion damages. The second is safety and reliability of equipment and structure, which may lead to catastrophic consequences due to corrosion, resulting an incalculatable loss of life and money. For example, Guadalajara explosions took place on April 22, 1992, in the downtown district of Analco. Numerous gasoline explosions in the sewer system over four hours destroyed 8 kilometres of streets. Gante Street was the most damaged. Officially, by the Lloyd's of London accounting, 252 people were killed; nearly 500 injured and 15,000 were left homeless. The estimated monetary damage ranges between $300 million and $1 billion. Similarly the Silver Bridge in West Virginia collapsed due to pitting corrosion ki II ing 46 people on the bridge in December, 1967. The third area, which is also no lesser important, is depletion of limited material resources including wastage of energy, water, manpower etc. Though the development is fast enough in almost every sphere of I ife, including the designing of structure and process equipments but the complexity of corrosive environments is also keeping its pace parallel. The designers, engineers, chemists and technologists are therefore, facing an insurmountable problem. Evan a small improvement in the prevention of corrosion would lead to a significant gain to the nation. The corrosion losses would have been greater if during last couple of decade, the subject had not been given the considerable attention. The corrosion problem has well understood and taken up by structure and equipment manufacturers, research organisations, corrosion associations and other institutions. If we wish to mitigate the corrosion, we have to understand the root cause of corrosion. In this part, classification of corrosion process would be discussed. Note de contenu : - CLASSIFICATION OF CORROSION PROCESS : A. Mechanism of corrosion processes - Chemical corrosion - FUNDAMENTAL OF OXIDATION AND TRANISHING - GROWTH OF SURFACE LAYER : Cracking and spalling - Effect of metal properties - Composition - Surface conditions - Effect of environment - Effect of high temperature - Biochemical corrosion or bio-corrosion or microbiologically induced corrosion - THE INFLUENCE OF MICROORGANISMS ON CORROSION PROCESSES En ligne : https://drive.google.com/file/d/1OJ2pixZG_pTW0z8GdU4p5MOldd0W6vNc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18976 [article]

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Rehabilitation of mainline pipeline / Dhirendra Sharma in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 85-89 Titre : Rehabilitation of mainline pipeline Type de document : texte imprimé Auteurs : Dhirendra Sharma, Auteur Année de publication : 2013 Article en page(s) : p. 85-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion Caoutchouc Pipelines -- Entretien et réparations Pipelines -- Revêtements protecteurs Polymères Polyoléfines Une 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). Revêtement autoréparant:Peinture autoréparante Traîtements de surface Viscoélasticité Index. décimale : 667.9 Revêtements et enduits Résumé : Pipelines provide a safe, sustainable, reliable, and economic solution for the transport of oil, gas, and water. Most transmission fines today are buried and are protected from corrosion using high performance coatings backed-up with cathodic protection, they are therefore unseen and generally secure from third party interference. India has thousands of kilometers of pipelines which are nearing their design lifetime and were installed and coated over-the-ditch ; recoating these fines can greatly extend their useful lifetime and avoid costly leaks and failures. This paper details various methods of modern rehabilitation and reviews the different technologies and coating choices available, together with application methods and their associated costs. Note de contenu : - PARAMETERS FOR SELECTION OF REHABILITATION COATINGS : Type of external corrosion - Type of parent coating - Environmental, health and safety regulations - Field application - Surface preparation - Application process - Past track record - TYPE OF REHABILITATION COATINGS : Polyolefin tape with primer activated butyl rubber based adhesive coatings - Low preheat high shear strength butyl rubber based heat shrinkable sleeves - Liquids coatings - Visco-elastic self healing coatings En ligne : https://drive.google.com/file/d/1_WPbukQ-rzEFJC-lfgjQKjm0rT05E5aT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18977 [article]

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Pigments part - XI (f) / Mukund Hulyalkar in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 98 Titre : Pigments part - XI (f) Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2013 Article en page(s) : p. 98 Langues : Anglais (eng) Catégories : Photostabilité Pigments -- Propriétés chimiques Pigments -- Propriétés thermiques Index. décimale : 667.2 Colorants et pigments En ligne : https://drive.google.com/file/d/1cDZXEnR3k5TvwNtAv-f764TEAP-8ibYJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36315 [article]

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Road to road marking paints - II / Mukund Hulyalkar in PAINTINDIA, Vol. LXIII, N° 6 (06/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 6 (06/2013) . - p. 104 Titre : Road to road marking paints - II Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2013 Article en page(s) : p. 104 Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Marquage routier (peinture) Revêtement en phase solvant:Peinture en phase solvant Index. décimale : 667.6 Peintures Note de contenu : - Solvents based - A - Road marking paint, spirit based as per IS-164 - Solvents based - B - special formulation by author). Road marking paint, CR base (suitable for tar road also) En ligne : https://drive.google.com/file/d/1eCAkESvDEEvLkmG4RmpNW7Qq2YHGTnmx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36316 [article]

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