Title of article :
Using an organically-modified montmorillonite to compatibilize a biodegradable blend
Author/Authors :
Magalhمes، نويسنده , , Natلlia F. and Dahmouche، نويسنده , , Karim and Lopes، نويسنده , , Gisela K. and Andrade، نويسنده , , Cristina T.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
8
From page :
1
To page :
8
Abstract :
Glycerol-plasticized cornstarch and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) blends were prepared by melt-extrusion at a constant 70:30 (mass/mass) ratio in the presence of a commercial organoclay. The effect of increasing the organoclay content on the morphology and physical properties of the blends was investigated soon after processing and after aging for 12 months. After processing, the materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and dynamic mechanical analysis (DMA). The results indicated that increasing clay mineral contents promoted significant improvements in the compatibility between the components. After aging, the samples were characterized by SEM, XRD and small-angle X-ray scattering (SAXS). Unexpectedly, the reduced size of the PHBV dispersed phase and the decreased crystallinity of both phases in the hybrids were maintained. XRD and SAXS results unambiguously proved the presence of both exfoliated layers and a small volume fraction of organoclay aggregates in the aged clay polymer nanocomposites.
Keywords :
Modified montmorillonite , Starch , poly(3-hydroxybutyrate-co-3-hydroxyvalerate) , SAXS , Physical Properties , Clay polymer nanocomposite
Journal title :
Applied Clay Science:an International Journal on the Application...
Serial Year :
2013
Journal title :
Applied Clay Science:an International Journal on the Application...
Record number :
2224324
Link To Document :
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