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Thermal Decomposition Behavior of Carbon Nanotube Reinforced Thermotropic Liquid Crystalline Polymers

Title
Thermal Decomposition Behavior of Carbon Nanotube Reinforced Thermotropic Liquid Crystalline Polymers
Author
김성훈
Keywords
activation energy; degradation; liquid crystalline polymer; nanoparticles; thermogravimetric analysis (TGA); POLY(ETHYLENE 2,6-NAPHTHALATE) NANOCOMPOSITES; HEATING-RATE METHODS; THERMOGRAVIMETRIC DATA; COMPOSITES; DEGRADATION; KINETICS; COPOLYESTERS; NUCLEATION; BLEND
Issue Date
2011-05
Publisher
WILEY-BLACKWELL, COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
Citation
JOURNAL OF APPLIED POLYMER SCIENCE; NOV 5 2011, 122 3, p2060-p2070, 11p.
Abstract
Thermotropic liquid crystalline polymers (TLCP), 4-hydroxybenzoic acid (HBA)/6-hydroxyl-2-naphthoic acid (HNA) copolyester, and HNA/hydroxylbenzoic acid (HAA)/terephthalic acid (TA) copolyester reinforced by carbon nanotube (CNT) were prepared by melt compounding using Hakke internal mixer. The thermal behavior and degradation of CNT reinforced HBA/HNA copolyester and HNA/HAA/TA copolyester have been investigated by dynamic thermogravimetric analysis under nitrogen atmosphere in the temperature range 30 to 800 degrees C to study the effect of CNT on the thermal decomposition behavior of the TLCP/CNT nanocomposites. The thermal decomposition temperature at the maximum rate, residual yield, integral procedural decomposition temperature, and activation energy for thermal decomposition was studied to investigate thermal stability of TLCP/CNT nanocomposites. The thermal stability of CNT reinforced HBA/HNA copolyester was increased by addition of a very small quantity of CNT and the residual weight was 42.4% and increased until 50.8% as increasing CNT contents. However, the thermal stability of CNT reinforced HNA/HAA/TA copolyester was decreased initially when a very small quantity of CNT added. The residual weight was decreased from 50.4% to 45.1%. After addition of CNTs in the TLCP matrix, the thermal stability of CNT reinforced HNA/HAA/TA copolyester increased as increasing content of CNT and the residual weight was increased until 53% as increasing CNT contents. The activation energy was calculated by multiple heating rate equations such as Friedman, Flynn-Wall-Ozawa, Kissinger, and Kim-Park methods to confirm the effect of CNT in two different TLCP matrices. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 2060-2070, 2011
URI
http://onlinelibrary.wiley.com/doi/10.1002/app.34200/abstract
ISSN
0021-8995
DOI
10.1002/app.34200
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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