Polypropylene/talc/graphene nanoplates (GNP) hybrid composites: Effect of GNP content on the thermal, rheological, mechanical, and electrical properties

Polypropylene/talc/graphene nanoplates (GNP) hybrid composites: Effect of GNP content on the thermal, rheological, mechanical, and electrical properties

Polypropylene (PP)/talc composites are used extensively in the automotive, aeronautical, and consumer goods industries; however, the increasing demand for more efficient, safe, and less environmentally impact materials makes it necessary to include new reinforcements. In this way, the use of graphen...

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Bibliographic Details
Published in:Journal of applied polymer science Vol. 140; no. 12
Main Authors: Sarturato, Ana Carolina Prataviera, Dos Anjos, Erick Gabriel Ribeiro, Marini, Juliano, Morgado, Guilherme Ferreira De Melo, Baldan, Maurício Ribeiro, Passador, Fabio Roberto
Format: Journal Article
Language:English
Published: Hoboken, USA John Wiley & Sons, Inc 20-03-2023
Wiley Subscription Services, Inc
Subjects:
composites
Electrical properties
Electrical resistivity
Electromagnetic properties
Extrusion molding
Graphene
graphene and fullerenes
Hybrid composites
Injection molding
Materials science
mechanical properties
Melt flow index
Modulus of elasticity
Nanocomposites
nanotubes
Optimization
Percolation
Polymer matrix composites
Polymers
Polypropylene
Rheological properties
Rheology
Talc
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Summary:Polypropylene (PP)/talc composites are used extensively in the automotive, aeronautical, and consumer goods industries; however, the increasing demand for more efficient, safe, and less environmentally impact materials makes it necessary to include new reinforcements. In this way, the use of graphene nanoplates (GNP) is a good alternative because this carbon‐based material allows the achievement of new multifunctional nanocomposites with improved properties and process optimization. In this work, PP/talc (80/20) composites were prepared with the addition of 1, 3, 5, and 7 wt% of GNP using the extrusion process and injection molding. Morphological, thermal, rheological, mechanical, electrical, and electromagnetic characterizations were performed. The addition of GNPs led to a linear reduction in the melt flow index (MFI) of the samples. A rheological percolation was observed in the sample with the addition of 7 wt% of GNP. The addition of 5 and 7 wt% of GNP led to significant increases in elastic modulus and Shore D hardness. The electrical and electromagnetic evaluation showed that the increase of GNP in the compositions contributed to improvements in electrical conductivity and permittivity, resulting in a proportional increment in the total attenuation component (SET).
Bibliography:Funding information
FAPESP, Grant/Award Number: 2020/12501‐8; CNPq, Grant/Award Numbers: 307933/2021‐0, 440132/2021‐3
ISSN:0021-8995
1097-4628
DOI:10.1002/app.53657