PHENOMENE D'HYSTERESE DE MOUILLAGE SUR LES FILMS DE POLYMERES TRAITES PAR DECHARGE COURONNE PDF Download
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Author: ABDELHAQ.. AOUINTI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
LA STRUCTURE PHYSIQUE ET CHIMIQUE DES SURFACES DES POLYMERES PEUT ETRE MODIFIEE PAR DIFFERENTS PROCEDES AFIN DE LEUR DONNER DES PROPRIETES SPECIFIQUES TELLES QUE LA MOUILLABILITE, LA CONDUCTIVITE ELECTRIQUE SUPERFICIELLE... POUR MODIFIER D'UNE MANIERE CONTINUE LA SURFACE DES POLYMERES ETUDIES (PE, PET, PP, PMMA) NOUS AVONS ADOPTE LE TRAITEMENT PAR DECHARGE ELECTRIQUE COURONNE EN ATMOSPHERE LIBRE, QUI PRESENTE COMME AVANTAGE ESSENTIEL LA RAPIDITE DE TRAITEMENT, LA REPRODUCTIBILITE, ET LA FAIBLE CONSOMMATION D'ENERGIE. DANS LE CAS OU L'ENERGIE DE TRAITEMENT EST INFERIEURE A UNE VALEUR CRITIQUE W#C, LA CONCENTRATION DE GROUPEMENTS POLAIRES (OXYDES) CREES EN SURFACE CROIT LINEAIREMENT AVEC W. CE MODE DE TRAITEMENT PERMET DONC UNE OXYDATION CONTROLEE DE LA SURFACE DU POLYMERE. LES PROPRIETES DE MOUILLABILITE DE TELLES SURFACES ONT ETE ETUDIEES EN FONCTION DE L'ENERGIE DE TRAITEMENT W, C'EST-A-DIRE LA POLARITE DE LA SURFACE SOLIDE ET EN FONCTION DE LA POLARITE DU LIQUIDE. NOUS MONTRONS QUE L'HYSTERESE DE MOUILLAGE H DES DIFFERENTS POLYMERES EST PROPORTIONNELLE A LA RACINE CARREE DU PRODUIT DE LA COMPOSANTE POLAIRE DE LA TENSION DE SURFACE DU LIQUIDE ET DE L'ENERGIE DE TRAITEMENT. DE CES RESULTATS, ON DEDUIT UNE METHODE POUR DETERMINER LA COMPOSANTE POLAIRE DE L'ENERGIE DE SURFACE DES POLYMERES. L'INTERET DE CETTE METHODE EST DE DONNER UNE VALEUR INDEPENDANTE DU LIQUIDE EMPLOYE, CE QUI N'EST PAS LE CAS DE LA METHODE DITE A DEUX LIQUIDES. LA LOI DONNANT L'HYSTERESE EN FONCTION DES COMPOSANTES POLAIRES DES TENSIONS DE SURFACE EST EXPLIQUEE PAR UNE RESTRUCTURATION DE LA SURFACE SOLIDE EN CONTACT D'UN LIQUIDE POLAIRE
Author: ABDELHAQ.. AOUINTI
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
LA STRUCTURE PHYSIQUE ET CHIMIQUE DES SURFACES DES POLYMERES PEUT ETRE MODIFIEE PAR DIFFERENTS PROCEDES AFIN DE LEUR DONNER DES PROPRIETES SPECIFIQUES TELLES QUE LA MOUILLABILITE, LA CONDUCTIVITE ELECTRIQUE SUPERFICIELLE... POUR MODIFIER D'UNE MANIERE CONTINUE LA SURFACE DES POLYMERES ETUDIES (PE, PET, PP, PMMA) NOUS AVONS ADOPTE LE TRAITEMENT PAR DECHARGE ELECTRIQUE COURONNE EN ATMOSPHERE LIBRE, QUI PRESENTE COMME AVANTAGE ESSENTIEL LA RAPIDITE DE TRAITEMENT, LA REPRODUCTIBILITE, ET LA FAIBLE CONSOMMATION D'ENERGIE. DANS LE CAS OU L'ENERGIE DE TRAITEMENT EST INFERIEURE A UNE VALEUR CRITIQUE W#C, LA CONCENTRATION DE GROUPEMENTS POLAIRES (OXYDES) CREES EN SURFACE CROIT LINEAIREMENT AVEC W. CE MODE DE TRAITEMENT PERMET DONC UNE OXYDATION CONTROLEE DE LA SURFACE DU POLYMERE. LES PROPRIETES DE MOUILLABILITE DE TELLES SURFACES ONT ETE ETUDIEES EN FONCTION DE L'ENERGIE DE TRAITEMENT W, C'EST-A-DIRE LA POLARITE DE LA SURFACE SOLIDE ET EN FONCTION DE LA POLARITE DU LIQUIDE. NOUS MONTRONS QUE L'HYSTERESE DE MOUILLAGE H DES DIFFERENTS POLYMERES EST PROPORTIONNELLE A LA RACINE CARREE DU PRODUIT DE LA COMPOSANTE POLAIRE DE LA TENSION DE SURFACE DU LIQUIDE ET DE L'ENERGIE DE TRAITEMENT. DE CES RESULTATS, ON DEDUIT UNE METHODE POUR DETERMINER LA COMPOSANTE POLAIRE DE L'ENERGIE DE SURFACE DES POLYMERES. L'INTERET DE CETTE METHODE EST DE DONNER UNE VALEUR INDEPENDANTE DU LIQUIDE EMPLOYE, CE QUI N'EST PAS LE CAS DE LA METHODE DITE A DEUX LIQUIDES. LA LOI DONNANT L'HYSTERESE EN FONCTION DES COMPOSANTES POLAIRES DES TENSIONS DE SURFACE EST EXPLIQUEE PAR UNE RESTRUCTURATION DE LA SURFACE SOLIDE EN CONTACT D'UN LIQUIDE POLAIRE
Author: Biodiesel Production Technologies Challenges and Future Prospects Task Committee
Publisher:
ISBN: 9780784415344
Category : Biodiesel fuels
Languages : en
Pages : 848
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Book Description
Biodiesel Production: Technologies, Challenges, and Future Prospects provides in-depth information on fundamentals, approaches, technologies, source materials and associated socio-economic and political impacts of biodiesel production.
Author: Satinder Kaur Brar
Publisher: Springer Science & Business Media
ISBN: 1461480051
Category : Science
Languages : en
Pages : 500
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Book Description
Agro-industrial wastes are end-products emerging after industrial processing operations and also from their treatment and disposal e.g. solid fruit wastes and sludge. The agro-industrial wastes are often present in multiphase and comprise multicomponent. Nevertheless, these wastes are a goldmine as they possess valuable organic matter which can be diverted towards high value products ranging from polymers to antibiotics to platform chemicals. There have been plenty of books published on bioenergy, enzymes and organic acids, among others. However, this emerging field of biochemical has not yet been covered so far which is an important entity of the biorefinery model from waste biomass and needs to be understood from fundamental, applied as well as commercial perspective which has been laid out in this book.
Author: John Henry Lorentz
Publisher: Historical Dictionaries of Asia, Oceania, and the Middle East
ISBN:
Category : History
Languages : en
Pages : 570
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Book Description
Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Author:
Publisher:
ISBN:
Category :
Languages : fr
Pages : 172
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Book Description
Author: Satinder Kaur Brar
Publisher:
ISBN: 9781619428034
Category : Agricultural pests
Languages : en
Pages : 0
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Book Description
Agricultural and forest pests lead to many plant diseases resulting in poor yield and productivity. Traditionally, chemical pesticides have been used to control these pests. However, the adverse health impacts of chemical pesticides have triggered parallel research in safe biological options. Nevertheless, biocontrol has come a long way ever since the commercialisation of the first Bacillus thuringiensis based biopesticide (sporeine) in the 1940s, however, still there are research gaps. New knowledge and practical experiences have been added over the last few decades. This book reviews research on biological control agents, including bacterial, fungal and viral biopesticides along with their advanced formulation options.
Author: Malcolm D Bolton
Publisher: Universities Press
ISBN: 9788173714252
Category : Soil mechanics
Languages : en
Pages : 464
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Book Description
Covers all the soil mechanics and foundation engineering topics that are commonly included in civil engineering degree courses, and provides a number of springboards into related advanced topics. Although it is intended principally to satisfy the needs of student civil engineers, this guide should also prove useful to those practicing engineers who are unaware of the powerful and elegant reconstruction of the subject which has been made possible by the recent concepts of plasticity, dilatancy and critical states.
Author: Terry W. Sturm
Publisher: DIANE Publishing
ISBN: 1428995048
Category : Bridges
Languages : en
Pages : 147
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Book Description
Experimental results and analyses are given in this report on bridge abutment scour in compound channels. Experiments were conducted in a laboratory flume with a cross section consisting of a wide floodplain adjacent to a main channel. The embankment length, discharge, sediment size, and abutment shape were varied, and the resulting equilibrium scour depths were measured. Water-surface profiles, velocities, and scour-hole contours were also measured. In the report, a methodology is developed for estimating abutment scour that takes into account the redistribution of discharge in the bridge contraction, abutment shape, sediment size, and tailwater depth. The independant variables in the proposed scour formula are evaluated at the approach-channel cross section and can be obtained froma one-dimensional water-surface profile computer program such as the Water-Surface Profile Program (WSPRO). The proposed scour evaluation procedure is outlined and illustrated, including consideration of the time required to reach equilibrium scour. The proposed methodology is applied to two cases of measured scour in the field.
Author: Shahid Javed Burki
Publisher:
ISBN:
Category : History
Languages : en
Pages : 472
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Book Description
Pakistan is unlike most other countries in the emerging world. It is one of the two nations – the other being the state of Israel – founded on the basis of religion. Although it was created to provide a homeland for the Muslim community of British India, in its original form it was able to accommodate only about half of the people of Islamic faith who lived in the subcontinent. Pakistan’s birth in 1947 resulted in one of the largest movements of people in human history when some 14 million people left their homes, with 8 million Muslims leaving India for what is now Pakistan and 6 million Hindus and Sikhs moving in the opposite direction. This was the first large-scale incidence of ethnic cleansing the world was to witness. --
Author: Dominic A. Vargas
Publisher: Nova Science Publishers
ISBN: 9781621003533
Category : Citric acid
Languages : en
Pages : 0
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Book Description
In this book, the authors present topical research in the study of the synthesis, properties and applications of citric acid. Some of the topics discussed include fungal and yeast production of citric acid; mitochondrial production and applications in food and pharmaceutical industries; synthesis of the CuO/CeO2 catalytic system by polymerisation with citric acid; citric acid as a useful tool in artificial enamel formation and regeneration; the impact of citrate on glycolysis in brain tumours and applications of citrus fruits and their extracts for detection of food poisoning caused by bacteria.
