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Description of the dynamic moduli of poly(trimethylene terephthalate)/polyamide‐12 blends in molten state
Author(s) -
Asadinezhad A.,
Yavari A.,
Jafari S.H.,
Khonakdar H.A.,
Böhme F.
Publication year - 2005
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20413
Subject(s) - materials science , rheology , viscoelasticity , composite material , polyamide , rheometer , dynamic mechanical analysis , rheometry , scanning electron microscope , shear rate , viscosity , polymer
Binary melt blends of two thermoplastics—poly(trimethylene terephthalate) (PTT) and polyamide‐12 (PA12)—having a large difference in zero‐shear viscosity values, were prepared in different blending ratios (PTT/PA12 90/10, 75/25, 25/75, 10/90) by means of a twin‐screw extruder. Scanning electron microscopy (SEM) confirmed droplet morphology subsequently quantified using image analysis. Dynamic rheological behavior at blending temperature (230°C) was also recorded on a parallel plate oscillatory rheometer within the linear viscoelastic range. The applicability of two emulsion models, the Palierne analysis plus the Gramespacher and Meissner model, as well as a micromechanical model, the Coran analysis, to describe the dynamic moduli of the system in different compositions was investigated and also a comparison on these models was presented. POLYM. ENG. SCI., 45:1401–1407, 2005. © 2005 Society of Plastics Engineers