| Titre : | Etude des proprietes des melanges composites a base de polypropylene /PP-g-MAH/ polyamide 66 renforce par les fibres de verre, influence de la modification interfaciale |
| Auteurs : | Safidine Zitouni ; Said Fellahi, Directeur de thèse |
| Type de document : | texte imprimé |
| Editeur : | Sétif : Université Ferhat Abbas faculté des sciences de l’Ingénieur département de génie des procédés, 2008 |
| ISBN/ISSN/EAN : | TS4/7545 |
| Format : | 1 vol. (VII-185 f.) / ill. |
| Note générale : | Bibliogr. Annexes |
| Langues: | Français |
| Catégories : | |
| Résumé : |
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. |
Exemplaires (1)
| Cote | Support | Localisation | Disponibilité |
|---|---|---|---|
| TS4/7545 | Thèse | Bibliothèque centrale | Disponible |
Accueil
