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Polymer Bulletin
Published in: Polymer Bulletin 6/2009

01-12-2009 | Original Paper

Polypropylene-organoclay nanocomposites containing nucleating agents

Authors: S. V. Ghugare, P. Govindaiah, C. V. Avadhani

Published in: Polymer Bulletin | Issue 6/2009

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Abstract

Polypropylene/organoclay nanocomposites containing nucleating agents, viz., aluminum hydroxybis[2,2-methylenebis(4,6-di-tert-butylphenyl) phosphate (NA21) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol (Millad 3988), were prepared by direct melt intercalation in a twin-screw extruder. Nucleating agents were added to polypropylene during compounding and their effect on the properties of the nanocomposites was studied. X-ray diffraction (XRD) and transmission electron microscopy (TEM) exhibited clay layers to be intercalated and partially exfoliated. The expansion of inter-gallery distance of the clay layers was governed by the interaction between polypropylene, compatibilizer, and different nucleating agents. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) indicated higher thermal stability and crystallization temperature for nanocomposites compared to virgin polymer. Even a small addition of the nanoscale filler with 0.2% nucleating agents was found to promote concurrently several PP material properties, including improved tensile characteristics, higher Young’s modulus, increased thermal stability and rate of crystallization.
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Metadata
Title
Polypropylene-organoclay nanocomposites containing nucleating agents
Authors
S. V. Ghugare
P. Govindaiah
C. V. Avadhani
Publication date
01-12-2009
Publisher
Springer-Verlag
Published in
Polymer Bulletin / Issue 6/2009
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-009-0184-2

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