Mixing homologous high viscosity ratio polymer blends in converging flow / M. Meller in INTERNATIONAL POLYMER PROCESSING, Vol. XIV, N° 3 (09/1999)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XIV, N° 3 (09/1999) . - p. 221-227 Titre : Mixing homologous high viscosity ratio polymer blends in converging flow Type de document : texte imprimé Auteurs : M. Meller, Auteur ; André Luciani, Auteur ; Jan-Anders E. Manson, Auteur Année de publication : 1999 Article en page(s) : p. 221-227 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : Several studies have shown that deformation and breakup of dispersed droplets is easier in extensional than in shear flow field and this is particularly true for systems with high viscosity ratios. The simplest way to generate a significant extensional flow field in compounding equipment is to use converging flow conditions. In this work, the mixing efficiency of converging flow has been investigated as a function of the entry profile and the flow rate by using a capillary rheometer equipped with dies of different geometries. The material used for this study was a bimodal polyethylene presenting inhomogeneities due to the high viscosity ratio between the low and high molecular weight fractions. The results indicated that the mixing performance depended strongly on the die geometry and flow rate. A critical flow rate was observed for each particular entry profile at which the highest efficiency was observed. This critical flow rate was found to correspond to the onset of melt flow instabilities. Note de contenu : - EXPERIMENTAL PART : Rheological characterization - Converging flow experiments - Characterization- Materials - procedure - RESULTS AND DISCUSSION : Model bimodal blends - Converging flow DOI : 10.3139/217.1549 En ligne : https://drive.google.com/file/d/1jn5TpIji956nOtujlJtIeSNxNMHYKgEB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16132 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001009	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Surface pattern formation in UV-curable coatings / André Luciani in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 909 (10/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 909 (10/2000) . - p. 161-163 Titre : Surface pattern formation in UV-curable coatings Type de document : texte imprimé Auteurs : André Luciani, Auteur ; Christopher J. C. Plummer, Auteur ; Rudolf Gensler, Auteur ; Jan-Anders E. Manson, Auteur Année de publication : 2000 Article en page(s) : p. 161-163 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau  revêtement  Peinture  Durcissement  Rayonnement  UV  Formation  film  Texturation  motif Index. décimale : 667.9 Revêtements et enduits Résumé : Some UV curable coatings display matte surfaces after cure if they have undergone a certain period of leveling at a temperature above their glass transition temperature and the melting point of any crystalline co-reagents present in the formation. The matte finish of these coatings is due to the presence of coherent surface wrinkles after cure, which are similar in appearance to those induced by differential thermal contraction, when a metal layer is sputtered onto a rubbery or viscous substrate. However, the wrinkles in the UV-cured coatings appear under isothermal conditions, and it is, therefore, inferred that they are due to the dynamics of internal stresses induced by through-thickness variations in the extent of curing. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5787 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001214	-	Périodique	Bibliothèque principale	Documentaires	Disponible
001215	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)