Accueil
Résultat de la recherche
5 résultat(s) recherche sur le tag 'novolaque'
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Studies of degradation kinetics of novalac epoxy polyamide system / Madhu Bajpai in PAINTINDIA, Vol. L, N° 7 (07/2000)
[article]
Titre : Studies of degradation kinetics of novalac epoxy polyamide system Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; Sunita Seth, Auteur Année de publication : 2000 Article en page(s) : p. 47-50 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Epoxyde résine' Novolaque 'Polymère réticulé' 'Stabilité thermique' 'Dégradation Cinétique 'Energie activation' 'Ordre réaction' 'Etude expérimentale' novolaque' Index. décimale : 667.9 Revêtements et enduits Résumé : The novolac epoxies of different phenol formaldehyde ratios were cured with a polyamide adduct having amine value 226.5 mg/KOH. The thermogravimetric analysis of these resins were carried out to study degradation kinetics. The order of reaction was found to be one. The activation energy of the resins was found to be in increasing order (127-217) Joule mol') with the increase in molecular weight. The glass transition temperature (Tg) ranged from 97° to 224°C determined by Differential Scanning Calorimetry.
Revue / Journal TitlePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12750
in PAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 47-50[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001255 - Périodique Bibliothèque principale Documentaires Disponible Film characteristics of novolac based epoxy ester films - I / Madhu Bajpai in PAINTINDIA, Vol. XLVI, N° 5 (05/1996)
[article]
Titre : Film characteristics of novolac based epoxy ester films - I Titre original : Nigerseed oil epoxy esters Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; Arti Sharma, Auteur Année de publication : 1996 Article en page(s) : p. 27-32 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Epoxyde résine' Novolaque 'Corps gras végétal' Préparation 'Propriété physique' chimique' Feuil 'Résistance eau' base' 'Etude expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy esters were prepared from nigerseed oil fatty and novolac based epoxy resins. the novolac used for preparing the epoxy resins were prepared using different proportions of phenol and formaldehyde. The film characteristics of novolac based epoxy esters of different oil length were studied and comparison was made with the film characteristics of epoxy esters prepared from bisphenol-A based epoxy resin.
It was observed that all the films had dried within 24 hours and were tack-free the desired film forming characteristics. All the epoxy ester films passed the flexibility test on 1/4 inch mandrel. The scratch hardness of the films decreased with the increasing oil length irrespective of the phenolic source of the epoxy resin. The water resistance and alkali resistance of the epoxy ester films showed a definite pattern vis a vis the epoxy esters prepared from novolac and bisphenol-A. While the water resistance of the epoxy esters improved with the increasing oil length of the esters, yhe alkali resistance decreased with the increasing oil length. Both alkali resistance and water resistance improved with the higher proportion of formaldehyde in the novolac used as starting a material for the preparation of epoxy ester. Both the alkali and water resistance of the novolac based epoxy esters were superior to the epoxy esters based on bisphenol-A. All the epoxy ester films showed very goog acid-resistance.Note de contenu : - Experimental : Preparation of novolac resins - Preparation of epoxy resins - Preparation of epoxy esters - Preparation of coatings - Evaluation of film characteristics
- Results and Discussion : Drying time - Scratch hardness - Flexibility - Water rsistance - Alkali resistance - Acid resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13483
in PAINTINDIA > Vol. XLVI, N° 5 (05/1996) . - p. 27-32[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006504 - Périodique Bibliothèque principale Documentaires Disponible Film characteristics of novolac based epoxy ester films-II / Madhu Bajpai in PAINTINDIA, Vol. XLVII, N° 8 (08/1997)
[article]
Titre : Film characteristics of novolac based epoxy ester films-II Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; Arti Sharma, Auteur Année de publication : 1997 Article en page(s) : p. 53-58 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Epoxyde résine' Novolaque 'Ester polymère' 'Corps gras végétal' 'Nicotiana tabacum' 'Propriété physique' chimique' mécanique' Feuil Solanaceae Dicotyledones Angiospermae Spermatophyta Index. décimale : 667.9 Revêtements et enduits Résumé : Tobacco seed oil fatty acids were used to esterify novolac based epoxy resins. The novolac epoxy resins werepreparedby using three different ratios ofphenol to formaldehyde. The films of prepared epoxy esters with different oil lengths, were evaluated for various performance tests and were compared with those of bisphenol-A based epoxy resin. All the films dried faster and took a maximum of 13 hrs to dry tack free. Epoxy esters prepared from novolac epoxy resins having higher phenol to formaldehyde ratios showed better scratch hardness than those with lower ratios. Also, epoxy esters with shortest oil length possessed best scratch hardness. All the films were highly flexible. The studies showed that alkali resistance of epoxy esters is slightly better than water resistance. The water resistance increased with the increase in the oil length and also with increase in the phenol to formaldehyde ratio in novolac epoxy resins. In the case of alkali resistance, it increased with the increase in phenol - formaldehyde ratio and it decreased with the increase in oil length. The acid resistance of all the samples were excellent. Note de contenu : - EXPERIMENTAL - Preparation of novolac resins - Preparation of epoxy resins - Preparation of epoxy esters - Preparation of coating samples - Evaluation of film characteristics
- RESULTS AND DISCUSSION - Drying time - Scratch hardness - Flexibility - Water resistance - Alkali resistance - Acid resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13312
in PAINTINDIA > Vol. XLVII, N° 8 (08/1997) . - p. 53-58[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 006466 - Périodique Bibliothèque principale Documentaires Disponible Innovative bio-based composites for automotive applications / Pietro Campaner in JEC COMPOSITES MAGAZINE, N° 56 (04/2010)
[article]
Titre : Innovative bio-based composites for automotive applications Type de document : texte imprimé Auteurs : Pietro Campaner, Auteur ; Daniele d'Amico, Auteur ; Luigia Longo, Auteur Année de publication : 2010 Article en page(s) : p. 49-50 Langues : Anglais (eng) Tags : Cardanol Phénoplaste 'Fibre naturelle' végétale' 'Matériau composite' 'Propriété mécanique' 'Tissu textile' Stratifié 'Etude expérimentale' 'Déchet agricole' Phénols Durcissant Novolaque Epoxy renforcé fibre' Jute Index. décimale : 668.4 Plastiques, vinyles Résumé : Cimteclab S.p.A. has developed innovative bio-based composites using jute fibres as reinforcement and a cardanol-based thermosetting resin as the matrix. The use of a matrix derived from a natural resource increases the renewable portion of natural-fibre-reinforced composite materials. Note de contenu : - Cardanol-based epoxy curing agents
- Innovative bio-based compositesEn ligne : http://www.jeccomposites.com/news/composites-news/innovative-bio-based-composite [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14247
in JEC COMPOSITES MAGAZINE > N° 56 (04/2010) . - p. 49-50[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 012099 - Périodique Bibliothèque principale Documentaires Disponible Innovative epoxy prepregs using bio-based curing agents / Daniele d'Amico in JEC COMPOSITES MAGAZINE, N° 63 (03/2011)
[article]
Titre : Innovative epoxy prepregs using bio-based curing agents Type de document : texte imprimé Auteurs : Daniele d'Amico, Auteur ; Franco Innocente, Auteur Année de publication : 2011 Article en page(s) : p. 87-90 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Cardanol dérivé' Phénoplaste Adhésif 'Fibre minérale' 'Etude expérimentale' Amine 'Propriété mécanique' rhéologique' 'Effet concentration' 'Origine végétale' Novolaque 'Durcissement (matière plastique)' Stratifié'Epoxyde résine' 'Matériau composite' fibre unidirectionnelle' renforcé fibre' carbone' Durcissant Préimprégné Index. décimale : 668.4 Plastiques, vinyles Résumé : Technologycom S.r.l. and Cimteclab S.p.A. have developed an innovative epoxy prepreg using a cardanol derivative as curing agent. Two different cardanol-based epoxy systems were studied by DSC. The system showing the highest Tg was chosen for the manufacture of a UD carbon fibre prepreg by the hot melt process. Preliminary rheological measurements were performed to find the correct process parameters. Finally, the properties of cardanol-based resins and composites were compared with those of systems based on traditional amines. Note de contenu : - EXPERIMENTAL : Materials
- MEASUREMENTS : DSC analysis - Rheological measurements - Izod impact testing - Mechanical testing
- RESULTS AND DISCUSSION : PREMIMINARY MATRIX CHARACTERIZATION : DSC analysis - Rheological measurements - Izod impact test - Prepreg manufacture - Results of the mechanical tests on the composite laminatePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13770
in JEC COMPOSITES MAGAZINE > N° 63 (03/2011) . - p. 87-90[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 013161 - Périodique Bibliothèque principale Documentaires Disponible