Insights on the processing and thermal degradation kinetics of PA6/PE‐g‐AA blends

Author:

Araújo Amanda1,Franco Luiz1,Barreto José1,Barros Ana2,Bezerra Elieber2,Luna Carlos2,Ferreira Eduardo2,Silva Ingridy1,Souza Matheus1,Araújo Edcleide2,Wellen Renate12ORCID

Affiliation:

1. Materials Engineering Department Federal University of Paraíba João Pessoa Brazil

2. Academic Unit of Materials Engineering Federal University of Campina Grande Campina Grande Brazil

Abstract

AbstractBlends of polyamide 6 (PA6) and polyethylene‐grafted acrylic acid (PE‐g‐AA) in contents 90/10, 80/20, and 70/30 were processed in a torque rheometer. Fourier transform infrared spectroscopy spectra showed secondary hydrogen bond interactions between COOH (PE‐g‐AA) and NCOH (PA6) groups. Addition of PE‐g‐AA did not promote significant changes in the thermal stability of the blends, as evidenced in the torque curves and thermogravimetric plots, which showed weight loss in a single stage for PA6 and PE‐g‐AA, with T0.01 343 and 409°C, and predominant release of CO2, according to thermogravimetric analysis coupled to infrared spectra. The degradation kinetics were adequately modeled using Friedman, Ozawa—Flynn—Wall, and Vyazovkin, with R2 > 0.99, showing a higher value for PE‐g‐AA, occurring in a complex way with three competitive degradation mechanisms, F1, R3, and An.

Funder

Fundação de Apoio à Pesquisa do Estado da Paraíba

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Publisher

Wiley

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