Thermal degradation kinetics of polyimide containing 2,6-benzobisoxazole units

Meng, Xianglong; Huang, Yudong; Hong, Yu; Lv, Zushun

doi:10.1016/j.polymdegradstab.2007.03.005

Cited by 54 publications

(35 citation statements)

References 23 publications

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“…Many authors have used both isoconventional and discrimination methods in decomposition kinetics studies [29][30][31][32] . The comparison of the activation energies obtained by the Flynn-Wall-Ozawa and the CoatsRedfern models can be useful to estimate the probable thermodegradation kinetic mechanism of the material.…”

Section: Nitrogen Atmospherementioning

confidence: 99%

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

et al. 2013

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The non-isothermal thermogravimetric methods have been used extensively for the determination of kinetic parameters in polymers. The poly (ether ketones) are used as matrix in advanced high performance composites due its high thermal stability, excellent environmental performance and superior mechanical properties. In this work, the non-isothermal decomposition kinetics of the polymer poly (ether ether ketone) (PEEK) was evaluated in nitrogen and synthetic air atmospheres, using the Flynn-Wall-Ozawa and Coats Redfern models. The results showed that the necessary time for the material decomposes in 5% is approximately 216 years if it is submitted to temperatures of 350 °C in nitrogen atmosphere. On the other hand, if the material is submitted to air atmosphere, this decomposition time drops to about 1,05 years in the same temperature and for the same conversion rate. The decomposition kinetics study by Coats Redfern showed that the D3 mechanism (three-dimensional diffusion (Jander equation)) had better adjustment to the decomposition kinetics of the material in nitrogen atmosphere, while in synthetic air the R1 mechanism (phase boundary controlled reaction (one-dimensional movement)) has better adjustment to the decomposition kinetics of the material.

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Section: Nitrogen Atmospherementioning

confidence: 99%

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

et al. 2013

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“…This alteration has been recorded in the a) b) case of thermal degradation of different types of polymers. 19,29,30 From thermogravimetric data, the fractional decomposition (α) values were also calculated for each heating rate, and those values continuously increased as the temperature was increased. Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization and Thermal Decomposition Kinetics of a Novel Benzofuran Ketoxime Derived Polymer

Bolat

Kırılmış

Kurt

2015

ACSi

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A novel benzofuran ketoxime derived polymer, poly(benzofuran-2-yl-methylketoxime-O-methacrylate) [poly(BMK-MA], was firstly synthesized by free radical polymerization method. Its thermal degradation studies were performed by thermogravimetric analysis (TGA) in order to determine the actual reaction mechanisms of the decomposition process. The activation energy of the solid-state process was determined by using Flynn-Wall-Ozawa method, which resulted to be 235.9 kJ/mol. The activation energies of different mechanism models were determined by Coats-Redfern, Madhusudanan and Van Krevelen kinetic methods. Compared with the Ozawa method, the actual reaction mechanism obeyed deceleration type, phase boundary controlled reaction (R 1 ).

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“…In decomposition kinetic studies, various researchers have used both iso--conventional and discrimination methods, as per their fi ndings by comparing the activation energies, it is quite justifi ed to use either Flynn-Wall-Ozowa (FWO) or Coats Redfern (CR) models to estimate the kinetic mechanism of different materials by thermal degradation [19][20][21][22][23] . In non-isothermal kinetic studies, the relation for linear temperature increase with time is given as follows: T = T o + βt (1) Where β is the constant heating rate, T o is the initial temperature and t is the time.…”

Section: Coats Redfern Methods Of Kinetic Analysismentioning

confidence: 99%

Thermal and kinetic analysis of pure and contaminated ionic liquid: 1-butyl-2.3-dimethylimidazolium chloride (BDMIMCl)

Ali¹

2016

Polish Journal of Chemical Technology

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In this research work, thermal decomposition and kinetic analysis of pure and contaminated imidazolium based ionic liquid (IL) has been investigated. As thermal decomposition and kinetics evaluation plays a pivotal role in effective process design. Therefore, thermal stability of pure 1-butyl-2,3-dimethylimidazolium chloride (BDMIMCl) was found to be higher than the sample of IL with the addition of 20% (wt.) NH4Cl as an impurity. The activation energy of thermal degradation of IL and other kinetic parameters were determined using Coats Redfern method. The activation energy for pure IL was reduced in the presence of NH4Cl as contaminant i.e., from 58.7 kJ/mol to 46.4 kJ/mol.

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Thermal degradation kinetics of polyimide containing 2,6-benzobisoxazole units

Cited by 54 publications

References 23 publications

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

Synthesis, Characterization and Thermal Decomposition Kinetics of a Novel Benzofuran Ketoxime Derived Polymer

Thermal and kinetic analysis of pure and contaminated ionic liquid: 1-butyl-2.3-dimethylimidazolium chloride (BDMIMCl)

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