Non-Isothermal Crystallization Kinetics of Polyamide 6/Graphene Nanoplatelets Nanocomposites Obtained via In Situ Polymerization: Effect of Nanofiller Size

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abstract

Thermoplastic resin transfer molding (T-RTM) technology was applied to synthesize graphene nanoplatelets-based nanocomposites via anionic ring-opening polymerization (AROP). Polyamide 6 (PA6) was obtained by AROP and was used as the polymeric matrix of the developed nanocomposites. The non-isothermal crystallization behavior of PA6 and nanocomposites was analyzed by differential scanning calorimetry (DSC). Nanocomposites with 0.5 wt.% of graphene nanoplatelets (GNPs) with two different diameter sizes were prepared. Results have shown that the crystallization temperature shifted to higher values in the presence of GNPs. This behavior is more noticeable for the nanocomposite prepared with smaller GNPs (PA6/GN). The crystallization kinetic behavior of all samples was assessed by Avrami and Liu's models. It was observed that GNPs increased the crystallization rate, thus revealing a nucleating ability, and also validated the reduction of half-time crystallization values. Such tendency was also supported by the lower activation energy values determined by Friedman's method.

keywords

THERMOPLASTIC COMPOSITES; ELECTRICAL-CONDUCTIVITY; GRAPHITE NANOPLATELETS; ANIONIC POLYAMIDE-6; FILLED POLYAMIDE-6; VACUUM INFUSION; MELT; BEHAVIOR; POLYPROPYLENE; OPTIMIZATION

subject category

Polymer Science

authors

Lagarinhos, J; da Silva, SM; Oliveira, JM

our authors

foto J. Martinho Oliveira

J. Martinho Oliveira

Coordinator Professor
foto Joana Nogueira Lagarinhos

Joana Nogueira Lagarinhos

PhD Student
no photo

Sara Patrícia Magalhães da Silva

Junior Researcher

Groups

G4 - Renewable Materials and Circular Economy

Projects

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

acknowledgements

The authors would like to acknowledge Simoldes Group for funding this research. This isa project in collaboration with Simoldes Plasticos, S.A. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 and LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC)

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Publication Details

type
Journal Article
year
2023
journal
POLYMERS
volume
15
article number
4109
publisher
MDPI
issue
20
digital object identifier
10.3390/polym15204109
web of science article identifier
WOS:001095338300001

Journal Metrics (JCR 2019)

Journal Impact Factor
3.426
Journal Impact Factor (5 yrs)
3.636
category normalized journal percentile
82.584

Citations

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