Results 21 to 30 of about 30,925 (146)

Vinyl Sulfonate/Vinyl Amide Copolymers and Different Surfactants As Suitable Systems in Eorat Higher Temperatures and Salinities Utilisation de mélanges de copolymères vinyl sulfonate/vinyl amide et de différents tensio-actifs en RAP dans des conditions de fortes salinités et de températures élevées

Oil & Gas Science and Technology, 2006
For enhanced oil recovery flooding processes there will be an increasing demand for polymers having high temperature and electrolyte stability. High molecular weight copolymers based on vinyl sulfonate, vinyl amide, and acryl amide show high performances
Von Halasz S. P.
doaj   +1 more source

Probing Achiral Benzene‐1,3,5‐tricarboxamide Monomers as Inducers of Homochirality in Supramolecular Helical Catalysts**

ChemistryEurope, 2023
Adding a complementary achiral monomer to polymers embedding a mixture of enantiopure monomers (the “sergeants”) and achiral monomers (the “soldiers”) is expected to decrease the optical purity of the polymer main chain.
Huanjun Kong, Dr. Yan Li, Dr. Ahmad Hammoud, Ludovic Dubreucq, Claire Troufflard, Régina Maruchenko, Dr. Laurent Bouteiller, Dr. Matthieu Raynal   +7 more
doaj   +1 more source

C29 Nanogels obtenus par interactions électrostatiques ; Formulation, caractérisations et études de libérations

Journal Africain de Technologie Pharmaceutique et Biopharmacie, 2023
Introduction : Le domaine de la nanoformulation connaît un essor continu depuis l'avènement de vecteurs permettant d'encapsuler des molécules à la fois hydrosolubles, liposolubles et amphiphiles pour la délivrance de médicaments.
Sidy Mouhamed Dieng, Ahmédou Bamba Koueimel Fall, Papa Mady Sy, Alphone Rodrigue Djiboune, Mamadou Niass, Moussa Diop, Louis Augustin Diagua Diouf, Gora Mbaye, Oumar Thioune, Mounibé Diarra   +9 more
doaj   +1 more source

Aspects récents de la thermodynamique des solutions de polymères Recent Aspects of the Thermodynamics of Polymer Solutions

Oil & Gas Science and Technology, 2006
On examine dans cet article différentes approches de la thermodynamique des solutions de polymères placées dans leur contexte historique. On rappelle d'abord le modèle du réseau de Flory-Huggins et on en souligne les déficiences.
Dayantis J.
doaj   +1 more source

Improvement of Barrier Properties of Biodegradable Polybutylene Succinate/Graphene Nanoplatelets Nanocomposites Prepared by Melt Process

Membranes, 2021
Polybutylene Succinate (PBS)/Graphene nanoplatelets (GnP) nanocomposites over a range of GnP from 0 to 1.35 wt.%. were prepared by a melt process. A mixture of individual graphene nanosheets and aggregates was obtained by the addition of GnP in the PBS ...
Raphaël Cosquer, Sébastien Pruvost, Fabrice Gouanvé   +2 more
doaj   +1 more source

A capacitive humidity sensor using cross-linked cellulose acetate butyrate [PDF]

, 2005
This paper reports on the fabrication of a new capacitive humidity sensor having good characteristics and being robust enough to be considered as a component in industrial processes.This sensor is manufactured using a mixture of three cellulose acetate ...
Bernès, Alain, Ducéré, Vincent, Labanne, Colette   +2 more
core   +3 more sources

Influence of Low Molecular Weight Polymers on the Rheology of Bentonite Suspensions Influence de polymères de faible masse moléculaire sur la rhéologie de suspensions de bentonite

Oil & Gas Science and Technology, 2006
In this communication we demonstrate how relatively low molecular weight synthetic polymers significantly alter the rheological properties of Bentonite/water suspensions depending upon the polymer dosage and/or degree of surface coverage on the clay ...
Rossi S., Luckham P. F., Zhu S., Briscoe B. J., Tadros T. F.   +4 more
doaj   +1 more source

Synthesis and Characterization of Vanillin-Based π-Conjugated Polyazomethines and Their Oligomer Model Compounds

Molecules, 2022
The synthesis of π-conjugated polymers via an environmentally friendly procedure is generally challenging. Herein, we describe the synthesis of divanillin-based polyazomethines, which are derived from a potentially bio-based monomer.
Lauriane Giraud, Stéphane Grelier, Etienne Grau, Laurent Garel, Georges Hadziioannou, Brice Kauffmann, Éric Cloutet, Henri Cramail, Cyril Brochon   +8 more
doaj   +1 more source

Evolution of polymer blend morphologies during extrusion in a flat die [PDF]

, 2009
The control of blend morphologies during process is of prime importance in order to predict the final properties of polymer blends. A coextrusion technique combined with static mixers was developed in order to smartly blend polymeric melts and to ...
GUINAULT, Alain, SOLLOGOUB, Cyrille
core   +5 more sources

Polymer-Surfactant Mono and Bilayers Monocouches et bicouches de polymères et de tensioactifs

Oil & Gas Science and Technology, 2006
Although there are many studies of association of polymers and surfactants in solution, much less is known about their association at surfaces. In this paper, several examples will be presented : water insoluble polymers spread at the surface of ...
Langevin D.
doaj   +1 more source