Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Synthesis and curing of cardanol-based vinyl ester resins for applications in surface coatings - I / Minakshi Sultania in PAINTINDIA, Vol. LIX, N° 12 (12/2009)
[article]
Titre : Synthesis and curing of cardanol-based vinyl ester resins for applications in surface coatings - I Type de document : texte imprimé Auteurs : Minakshi Sultania, Auteur ; J. S. P. Rai, Auteur ; Deepak Srivastava, Auteur Année de publication : 2009 Article en page(s) : p. 89-108 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Cardanol
Chromatographie sur gel
Esters de polyvinyle
Fourier, Spectroscopie infrarouge à transformée de
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Resins - Cardanol-based vinyl ester resin was synthesized by reacting the epoxy resin and methacrylic acid at an equivalent ratio of 1.0/0.9 in presence of triphenylphosphine (TPP) catalyst (1% by weight of the epoxy resin) and hydroquinone (200ppm as inhibitor) at 85°C in nitrogen atmosphere. The structural changes during the synthesis of VER were studied by Fourier-transform infrared spectroscopic (FT-IR) analysis. Gel permeation chromatographic (GPC) analysis gave the number - average molecular weight of cardanol-based epoxy resin (CNE) to be 780 gmole-1. A structure of synthesized cardanol-based VER was also proposed. A comparative study of vinyl ester resins (VERs), synthesized by using two different epoxy resins i.e. indigenous synthesized cardanol-based epoxidized novolac resin (CNE) and market procured 1138 EPN epoxy resin (EPN), was also proposed. A comparative study of vinyl ester resins (VERs), synthesized by using two different epoxy resins i.e. indigenous synthesized cardanol-based epoxidised novolac resin (CNE) and market procured 1138 EPN epoxy resin (EPN), was done in the present investigation. The resins were cured by using the mixture of resin, styrene and benzoyl peroxide in the ratio of 10:4:0.2 (w/w). Differential scanning calorimetric (DSC) technique was used to investigate the curing behaviour. It was found that the maximum peak temperatures for curing, in both the cases, were almost same. So, the cardanol-based VER may prove an alternative to EPN based VERs. Also, these resins may be environmentally friendly. Note de contenu : EXPERIMENTAL : Materials - Synthesis of vinyl ester resin from cardanol - Synthesis of phenol-based epoxidized novolac vinyl ester resin (PNEVER) - Curing of vinyl ester resins - Characterization of samples.
RESULTS AND DISCUSSION : Synthesis of cardanol-formaldehyde novolac resin (CFN) - FT-IR analysis of cardanol-formaldehyde novolac resin - Determination of molecular weight and average chain length of novolac prepolymer - Synthesis of cardanol-based epoxidized novolac resin (CNE) - Synthesis of cardanol-based epoxidized novolac vinyl ester resin (CNEVER) - Synthesis of phenol-based epoxidized novolac vinyl ester resin (PNEVER) - Curing of vinyl ester resin - Thermogravimetric analysis.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9048
in PAINTINDIA > Vol. LIX, N° 12 (12/2009) . - p. 89-108[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 012075 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1353-1364 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Caractérisation
Cardanol
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Oligomères
Polymères -- Synthèse
Revêtements -- Propriétés thermiques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, two kinds of phosphorus-containing cardanol-based acrylates were designed and synthesized. Firstly, a pre-polymer (PT-HCE) with three arms was synthesized using hydroxyethyl cardanol ether (HCE) and phosphorus oxychloride (POCl3) as raw materials. Then, the PT-HCE was acrylated to synthesize phosphate tris-hydroxyethyl cardanol epoxy acrylate resin (AEPT-HCE) and phosphate tris-hydroxyethyl cardanol photosensitive resin (APT-HCE). The structures of PT-HCE, AEPT-HCE and APT-HCE were characterized and the results showed that the photosensitive resins were successfully synthesized. In addition, AEPT-HCE and APT-HCE were used to prepare the flame-retardant UV/EB curing coatings. The properties of the coatings were tested, and the results revealed that different structures have a certain effect on Tg and tensile properties of the coatings. The cured films demonstrated excellent flame-retardant properties, showing flammability rating of V-0 in UL-94 test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phosphorus-containing cardanol-based oligomer - Synthesis of phosphate tris-hydroxyethyl cardanol epoxy acrylate resin - Synthesis of phosphate tris-hydroxyethyl cardanol acrylate resin - Preparation of UV/EB-cured coatings - Characterization
- RESULTS AND DISCUSSION : Structure characterization of cardanol-based resin - Double bond conversion ratio of coatings - Analysis of curing and conversion rate - Thermal stability of the coatings - Dynamic thermomechanical analysis of UV/EB-cured films - Properties of the UV/EB-cured coatings - Stress–strain curves of cured films - Flame retardancy of the cured films
- Table 1 Thermal properties of UV/EB-cured coatings
- Table 2 The properties of UV/EB-cured coatings
- Table 3 Refer to American society for testing and materials standard ASTM D3801-10DOI : https://doi.org/10.1007/s11998-021-00500-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00500-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36438
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1353-1364[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of UV-curable cardanol-based acrylate oligomers with cyclotriphosphazene core / Yan Yuan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
[article]
Titre : Synthesis and properties of UV-curable cardanol-based acrylate oligomers with cyclotriphosphazene core Type de document : texte imprimé Auteurs : Yan Yuan, Auteur ; Qiaohua Zhou, Auteur ; Ren Liu, Auteur Année de publication : 2019 Article en page(s) : p. 179-188 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Caractérisation
Cardanol
Cinétique chimique
Composés organiques -- Synthèse
Epoxydes
PhosphazèneLes phosphazènes sont une classe de composés chimiques comportant au moins une double liaison entre un atome de phosphore pentavalent et un atome d'azote, d'où les synonymes d'iminophosphoranes ou d'imides de phosphine.
En synthèse organique, le terme phosphazène est souvent utilisé pour désigner une sous-classe de composés dans lesquels l'atome de phosphore est lié à trois autres atomes d'azote. Ces composés sont étonnamment stables et montrent une remarquable basicité, ce qui en fait un des plus remarquables exemples de superbase organique neutre.Les bases phosphazène sont des bases peu nucléophiles plus fortes que les amines ou les amidines couramment utilisées comme la triéthylamine ou le DBU. La protonation n'a pas lieu sur l'atome de phosphore mais sur l'atome d'azote de la liaison iminophosphorane contrairement aux bases de Verkade dont la structure est assez proche.
Les phosphazènes sont devenus des réactifs appréciés en chimie organique.
L'un des plus connus est le BEMP avec un pKa de l'acide conjugué de 27,6 dans l'acétonitrile et la base de Schwesinger t-Bu-P4 (pKBH+ = 42,7).
Les bases phosphazène peuvent également permettre la titration des acides dans les solvants non-aqueux, leurs avantages étant qu'elles restent très fortes dans de nombreux solvants, que leur acide conjugué est inerte et qu'il ne forme pas de liaison hydrogène.
Photoréticulation
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermomécaniques
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Multiarm cardanol-based oligomers with a cyclotriphosphazene core were prepared through a nucleophilic substitution reaction; the structures of oligomers were fully characterized and confirmed through Fourier transfer infrared spectrometry, 1H nuclear magnetic resonance (NMR), 31P NMR, and gel permeation chromatography. The designed multiarm bio-based acrylates (AECC) were successfully prepared by epoxidizing the unsaturated aliphatic chain of cardanol segments with m-chloroperoxybenzoic acid and acrylating epoxy groups. The synthesized oligomers contain rigid phosphazene/benzene rings as “hard cores” and long aliphatic chains as “flexible shells.” Compared with commercial hyperbranched polyurethane acrylate (CN2302) and acrylated epoxidized soybean oil, cured AECC coatings and films exhibited not only greater hardness, excellent adhesion, higher glass transition temperatures, and excellent mechanical properties but also good thermal stability and biodegradability. We successfully obtained a high-performance UV-curing resin that has a high biorenewable material content and can meet basic daily requirements. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of cardanol-based multiarm acrylates with a cyclophosphazene core - Synthesis of multiarm cardanol-based cyclophosphazene - Synthesis of epoxidized multiarm cardanol-based resin with a cyclophosphazene core - Synthesis of acrylated epoxidized cardanol-based multiarm resin with a cyclophosphazene core - Preparation of UV-curable formulations and coating
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Characterization of cardanol-based acrylates - Photopolymerization kinetics - Mechanical properties of UV-cured films - Dynamic thermomechanical properties of UV-cured films - Properties of UV-curable coating - Thermal behavior characterization of UV-cured films - Environmental degradation of AECC cured films
- Table 1 : Formulations of UV-curable coatings based on AECC, AESO, and CN2302
- Table 2 : Mechanical properties of UV-cured films
- Table 3 : Properties of UV-curable AECC, AESO, and CN2302 coatings
- Table 4 : Degradation of weight loss ratio of AECC cured filmsDOI : 10.1007/s11998-018-0112-1 En ligne : https://link.springer.com/article/10.1007/s11998-018-0112-1 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31983
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 179-188[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20659 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of cardanol based epoxy resin for high solids UV curable coatings using bio based reactive diluent : review / Rupanshu Rastogi in PAINTINDIA, Vol. LXIX, N° 1 (01/2019)
[article]
Titre : Synthesis of cardanol based epoxy resin for high solids UV curable coatings using bio based reactive diluent : review Type de document : texte imprimé Auteurs : Rupanshu Rastogi, Auteur ; Risbabh Dwivedi, Auteur Année de publication : 2019 Article en page(s) : p. 55-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cardanol
Diluants
Epoxydes
Haut extrait sec
Polymères -- Synthèse
Revêtements -- Additifs
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : With the increase in demand for petrochemical resources resulting in continuous depletion and increased price it's a great challenge for coating industry to look down palliatives based on renewable and sustainable materials which are ecofriendly and non-hazardous. The paper describes some important routes of developing liquid epoxy resin from Cardanol which can be made UV curable by converting into acrylates using bio based reactive diluent based on ricinolic acid(castor oil). Hence the developed product is solvent free and used for high solids coating minimizing the environmental pollution. This dark brown-colored viscous liquid obtained from shel Is of the cashew nut can be utilized fora number of polymerization reactions due to its reactive phenolic structure and a meta-substituted unsaturated al iphatic chain. The product can be implemented in primer coats of metal and wood replacing the conventional Bisphenol-A based epoxy system. The negative impact of BPA on human health and the environnent necessarily implies the el imination of BPA especially in food contact materials. Therefore there is an increasing interest within the chemical industry for non-harmful aromatic substituents to BPA, especially for the synthesis of epoxy polymers. Thus, cardanol could be an interesting substitute to BPA in some polymers such as epoxy polymers. Note de contenu : - Routes of cardanol epoxy synthesis
- UV curing
- Synthesis of cardanol epoxy acrylate (oligomer resin)
- Reactive diluent from ricinoleic acid
- Fig. 1 : CNSL origin
- Fig. 2 : Physical characteristics of CNSL
- Fig. 3 : Chemical composition of CNSL
- Fig. 4 : Chemical structure of cardanol
- Fig. 5 : Scheme for malenisation of cardanol
- Fig. 6 : Scheme for epoxidation of malenised cardanol
- Fig. 7 : Chemical structure of cardanol novolac resin
- Fig. 8 : Scheme for preparation of cardanol novolac epoxy
- Fig. 9 : Reaction scheme of cardanol and polycardanol solid line : reaction route A ; dotted line : reaction route B
- Fig. 10 : Synthesis of polyols form cardanol
- Fig. 11 : Coating process and schematic principle of UV curing
- Fig. 12 : Schematic representation of the chemical processes occurring in EB and UV curing (radical mechanism). B : backbone of the resin molecule or the reactive diluent ; PI : photo-initiator ; R. : radicals initiating the propagation reaction
- Fig. 13 : Reaction of cardanol epoxy novalac with acrylic acid to bring unsaturation in the molecule
- Fig. 14 : Trifunctional cardanol epoxy acrylate oligomer prepared by reaction of the product obtained from Fig. 6 with acrylic acid
- Fig. 15 : Reaction of epoxidied cardanol from Fig. 8 with acrylic acid
- Fig. 16 : Examples of "alpha-cleavage type" and non-cleavable "electron transfer-hydrogen abstraction type"
- Fig. 17 : Synthesis of biobased reactive diluentEn ligne : https://drive.google.com/file/d/1u05gduYzEnUrj_jxK3USXMPGtu5A3AyX/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31939
in PAINTINDIA > Vol. LXIX, N° 1 (01/2019) . - p. 55-63[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 20675 - Périodique Bibliothèque principale Documentaires Disponible Toughening of cardanol based epoxidized novolac resin with acrylonitrile butadiene liquid ruber / Ranjana Yadav in PAINTINDIA, Vol. LXII, N° 12 (12/2012)
[article]
Titre : Toughening of cardanol based epoxidized novolac resin with acrylonitrile butadiene liquid ruber Type de document : texte imprimé Auteurs : Ranjana Yadav, Auteur Année de publication : 2012 Article en page(s) : p. 55-59 Note générale : Bibliogr Langues : Anglais (eng) Catégories : Caoutchouc
Cardanol
Copolymère carboxyle terminé de Butadiène-acrylonitrile
Epoxydes
Morphologie (matériaux)
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy resins are considered as one of the most important classes of thermosetting polymers for many industrial applications, but unfortunately they are characterized by a relatively low toughness. An epoxy resin based on cardanol and varying content of carboxyl-terminated (poly)butadiene acrylonitrile copolymer was cured using polyamine as a hardener. The ultimate aim of the study was to modify the brittle epoxy matrix by the liquid rubber to improve toughness characteristics. In this respect, many efforts have been made to improve the toughness of cured epoxy resins by the introduction of rigid particles, reactive rubbers, interpenetrating polymer networks and thermoplastics within the matrix. Toughening of blend of cardanol based epoxidized novolac resin withvarying weight ration (0-25 wt%) of carboxyl terminated butadiene acrylonitrile (CTBN) copolymer have been investigated. Fourier transform infrared (FTIR) spectroscopic analysis established that the interaction between oxirane groups of epoxy and CTBN were responsible for characteristic peak shifts in the blends compared to their counterparts. Scanning electron microscopy of fracture surfaces indicates cavitation of the rubber particles to be a major deformation mechanism. Particle-particle interaction is also found. Note de contenu : -MATERIALS : Preparation of blend samples of cardanol-based epoxidized novolac resins and carboxyl-terminated butadiene acrylonitrile copolymer (CTBN)
- CHARACTERIZATION OF BLEND SAMPLES : Fourier transforms infrared spectroscopic analysis - Morphology
- RESULTS AND DISCUSSION : Studies on the FTIR spectroscopic analysis - Toughening of epoxy resin by liquid rubber - Chemistry - Morphology and fracturographyPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17165
in PAINTINDIA > Vol. LXII, N° 12 (12/2012) . - p. 55-59[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14545 - Périodique Bibliothèque principale Documentaires Disponible Utilising renewable resources to create radiation curable polymers / Firdous Habib in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4590 (11/2013)
PermalinkUtilization of agro waste (CNSL) in coatings / Deepti Shikha in PAINTINDIA, Vol. LXI, N° 9 (09/2011)
Permalink