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Thermal degradation kinetics of polyimide nanocomposites from different carbon nanofillers: Applicability of different theoretical models
Author(s) -
Nayak Lalatendu,
Rahaman Mostafizur,
Khastgir Dipak,
Chaki Tapan Kumar
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45862
Subject(s) - nanocomposite , materials science , polyimide , thermal stability , composite material , activation energy , glass transition , kinetics , carbon nanotube , carbon nanofiber , degradation (telecommunications) , polymer , chemical engineering , chemistry , layer (electronics) , telecommunications , physics , quantum mechanics , computer science , engineering
In this study, the nanocomposites of polyimide (PI) with the nanofillers multiwalled carbon nanotube (MWCNT) and carbon nanofiber (CNF) were prepared by in situ polymerization technique. The thermal stability of the nanocomposites were investigated and discussed with respect to nanofillers type, concentration, and their functionality within the PI matrix. It is observed that there are 16 and 18 °C increment in thermal degradation temperature with the addition of 3 wt % MWCNT and CNF within the PI matrix, respectively. The thermal degradation kinetics of the nanocomposites were studied by Kissinger–Akahira–Sunose method, Flynn–Wall–Ozawa method, and Kim–Park method. The results show that these models are well fitted with the experimental data. It is found that the calculated activation energy increases with the increase in nanofillers loading and PI/CNF nanocomposites exhibit higher activation energy compared to PI/MWCNT composites at their similar loading. Moreover, the effect of nanofillers type and loading on the glass transition temperature of nanocomposites were also investigated in details. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45862.