降级(电信)
动力学
热稳定性
材料科学
化学工程
化学
物理
有机化学
计算机科学
工程类
电信
量子力学
作者
Ana Lucélia de Araújo,Lourdes Franco,José Augusto Barreto,Alexandre Guimarães de Almeida Barros,Elieber Barros Bezerra,Carlos Bruno Barreto Luna,Eduardo da Silva Barbosa Ferreira,Ingridy Dayane dos Santos Silva,Matheus Albino Souza,Edcleide Maria Araújo,Renate Maria Ramos Wellen
摘要
Abstract Blends 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 T 0.01 343 and 409°C, and predominant release of CO 2 , according to thermogravimetric analysis coupled to infrared spectra. The degradation kinetics were adequately modeled using Friedman, Ozawa—Flynn—Wall, and Vyazovkin, with R 2 > 0.99, showing a higher value for PE‐g‐AA, occurring in a complex way with three competitive degradation mechanisms, F1, R3, and An.
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