Influence of nanosized CaCO3 content in tailoring the structure, the morphology and the thermal and mechanical properties of iPP/PA66/PP-g-MA alloy
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Date
2021-03-29
Journal Title
Journal ISSN
Volume Title
Publisher
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
Abstract
Nanocomposites of Polypropylene/Polyamide 66 (iPP/PA66) with a weight
ratio of (70/30) filled with stearic acid-treated nanosized CaCO3 were melt
compounded in the presence of a fixed amount of grafted polypropylene
maleic anhydride (PP-g-MA) in a Brabender mixer. The purpose of this
research is to obtain nanocomposites with high-performance structural,
morphological, and thermomechanical properties. The obtained properties
are discussed in light of the content of nano-CaCO3 and of the induced
interfacial bonding properties generated by the insertion of the compatibilizer.
The results confirmed that, according to the FTIR spectroscopy analysis,
the existence, on one hand of possible interactions between PP-g-MA
and PA66 and, on the other hand, between stearic acid and PA66. XRD
results show that nanosized CaCO3 particles play the role of nucleating
agents in the matrix and thus increasing the crystallinity of the blend. SEM
results revealed that the treated nanosized CaCO3 was more homogeneously
dispersed in the (iPP/PA66), and a refinement of the morphology
and better dispersion of the filler were detected after the addition of PP-g-
MA. From the mechanical point of view; the incorporation of CaCO3
increased appreciably the tensile strength at break and the tensile modulus
of (iPP/PA66) blend