Journal
RHEOLOGICA ACTA
Volume 48, Issue 9, Pages 993-1004Publisher
SPRINGER
DOI: 10.1007/s00397-009-0381-9
Keywords
Polypropylene/EVOH blends; Extensional rheology; Nonlinear viscoelastic behavior; Compatibilization; Mechanical properties; Barrier properties
Categories
Funding
- Secretar a Xeral de Investigacion e Desenrolo, Xunta de Galicia [XUGA-PGIDT02TM17201PR]
- Portuguese government through FCT-Foundation for Science and Technology [BD/12833/2003]
Ask authors/readers for more resources
In order to find the relationships between processibility and properties of the polypropylene/ethylene vinyl alcohol copolymer (PP/EVOH) blends, their rheological behavior, in both shear and extensional flows, was studied and related with mechanical, morphological, and barrier properties of the materials. The nonlinear viscoelastic behavior in shear was also analyzed. The data showed that the rheological parameters (viscosity, loss modulus, storage modulus, extensional viscosity, and Trouton ratio) improved with the addition of low quantities of sodium ionomer copolymer used as compatibilizer. At the same time, the overall properties of the PP/EVOH blends improved as a result of the compatibilizer addition. The morphological analysis showed that the changes in the material properties were related with a more uniform distribution of EVOH particles in the PP matrix. The rheological data obtained allowed us to choose the optimal range for EVOH and ionomer contents, especially in terms of combining good processing characteristics with the good final properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available