Thermal, mechanical, and rheological characterization of polypropylene/layered double hydroxide nanocomposites

Polypropylene (PP)/organomodified layered double hydroxide (LDH) nanocomposites were prepared in order to examine the influence of LDH content on thermal, mechanical, and rheological properties. The nanostructure examinations by X‐ray diffraction (XRD) and transmission electron microscopy (TEM) conf...

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Bibliographic Details
Published in:Polymer engineering and science 2012-09, Vol.52 (9), p.2006-2014
Main Authors: Lonkar, Sunil P., Therias, Sandrine, Leroux, Fabrice, Gardette, Jean-Luc, Singh, Raj Pal
Format: Article
Language:English
Subjects:
Applied sciences
Chemical properties
Composition
Diffraction
Exact sciences and technology
Hydroxides
Identification and classification
Mechanical properties
Nanocomposites
Physicochemistry of polymers
Polymer industry, paints, wood
Polymeric composites
Polymers
Polypropylene
Rheology
Technology of polymers
Thermal properties
Transmission electron microscopy
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Summary:Polypropylene (PP)/organomodified layered double hydroxide (LDH) nanocomposites were prepared in order to examine the influence of LDH content on thermal, mechanical, and rheological properties. The nanostructure examinations by X‐ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed the exfoliated/intercalated dispersion of LDH. Incorporation of the LDH resulted in a noteworthy improvement in the thermal stability of PP. It was shown that the addition of LDH contributed to the reinforcement effect by increasing the elastic modulus. The mechanical performance, as evaluated by stress–strain curves, reveal that PP/LDH hybrid materials showed significant contribution toward increment in elastic modulus, tensile strength but at the expense of impact strength. The rheological response showed a strong influence of LDH particles on the flow behavior of the PP/LDH melt which resulted in enhancement of storage, loss of moduli, and complex viscosity of nanocomposites. Therefore, the nanocomposites have higher moduli but better processibility compared with pure PP. Overall, the results indicated that the LDH particles in nanometer size might act as potential reinforcing agent for polypropylene. POLYM. ENG. SCI., 52:2006–2014, 2012. © 2012 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.23147