Influence of Carbon Nanoparticles on Thermal, Mechanical and Rheological Properties of Polypropylene Nanocomposites Modified with Vinyl Trimethoxysilane

Summary In the present study, masterbatch of polypropylene and graphene nanocomposite was obtained by in situ polymerization. Afterwards, this masterbatch was diluted in commercial PP matrix previously treated with dicumyl peroxide (DCP) and vinyl trimethoxysilane (VTMS), originating grafted and rei...

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Bibliographic Details
Published in:Macromolecular symposia. 2016-10, Vol.368 (1), p.107-115
Main Authors: Araújo, Rafael S., Oliveira, Renato J. B., Libório, Patrícia, de Fátima V. Marques, Maria
Format: Article
Language:English
Subjects:
Carbon
crosslinked polypropylene
Crosslinking
grafted polypropylene
Grafting
Graphene
Nanocomposites
oscillatory rheometry
Polymerization
polypropylene
Polypropylenes
Rheological properties
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Summary:Summary In the present study, masterbatch of polypropylene and graphene nanocomposite was obtained by in situ polymerization. Afterwards, this masterbatch was diluted in commercial PP matrix previously treated with dicumyl peroxide (DCP) and vinyl trimethoxysilane (VTMS), originating grafted and reinforced filaments. Then, this material was crosslinked in water at 90 °C through condensation of hydroxyl groups derived from grafted PP chains. These materials were evaluated according to their thermal, mechanical and rheological properties. The results showed that it was possible to graft and crosslink PP, however, crosslinking was hindered by the presence of graphene sheets in the polymer matrix. In non‐reinforced crosslinked polymer, an increase in complex viscosity was observed, showing that actually occurred crosslinking. Furthermore, the grafted sample has lower molecular weight compared to the commercial PP. The crosslinked sample reduced its Newtonian plateau.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.201600011