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Titre :
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Etude des propriétés des mélanges composites a base de polypropylene /PP-g-MAH/ polyamide 66 renforce par les fibres de verre, influence de la modification interfaciale
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Auteurs :
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Safidine Zitouni ;
Said Fellahi, Directeur de thèse
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Type de document :
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document électronique
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Editeur :
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Sétif : Université Ferhat Abbas faculté des sciences de l’Ingénieur département de génie des procédés, 2008
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ISBN/ISSN/EAN :
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E-TH/0273
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Format :
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1 vol. (VII-185 f.) / ill.
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Note générale :
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Bibliogr. Annexes
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Langues:
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Français
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Catégories :
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Thèses (en français - en anglais) > Document électronique
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Résumé :
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The Study of the crystallization under nonisothermalconditions of reinforced polymer blends evidenced the influence of the thermomechanical history as well asthe effect of a compatibilizer on the crystallization behavior of the blend constituents, namely, PP andGFRPA66. The holding time and temperature are found to be 5 min and 2908C, respectively. The pres-ence of PP-g-MAH as a compatibilizing agent for PP/ GFRPA6 blends caused an increase in the crystalliza-tion temperature of PP in PP/GFRPA66 blends. The CCT curves established from the determination of no-isothermal kinetics give evidence for the changes in the crystallized fraction versus cooling rate. The CCT diagrams show a decrease in the crystallizationability of both PP and GFR PA 66 components with increasing cooling rate. CCT diagrams evidence the ex-istence of a temperature domain between 60 and 808C and 175–1958C where the crystallization rate is maxi-mal for PP and GFRPA66, respectively. Such diagrams have also evidenced the existence of an abrupt changeat the concentration of 2.5 wt % of compatibilizer and then levels off. However the concurrent crystallization behavior of GFRPA66 was not observable even thoughthe amount of PP-g-MAH was high. Finally, such crys-tallization diagrams are useful to evidence the role ofeach components and the effect of PP-g-MAH as a compatibilizer on the crystallization behavior of both components in PP/GFR PA 66 reinforced blends.
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En ligne :
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http://dspace.univ-setif.dz:8888/jspui/bitstream/123456789/1820/1/full%20thesis.pdf
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Exemplaires (1)
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| E-TH/0273 | Thèse | Bibliothèque centrale | Disponible |
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