The thermal decomposition of some polyimides containing pendent azobenzene groups was investigated with dynamic thermogravimetric analysis. Thermal degradation of azopolyimides took place in two or three steps. Traditional nonisothermal experiments involved linearizing an equation in some manner and fitting the resulting straight line to obtain the activation energy (Ea). The variation in activation energy with conversion degree of these polymers, obtained from two different kinetic methods, such as Flynn–Wall–Ozawa and Friedman, were compared and discussed.
SroogCE. History of the invention and development of the polyimides. In: GhoshMKMittalKL (eds) Polyimides fundamentals and applications. New York, NY: Marcel Dekker, 1996, pp. 1–6.
2.
HergenrotherPM. The use, design, synthesis, and properties of high performance/high temperature polymers: an overview. High Perform Polym2003; 15: 3–45.
3.
NatansohnARochonP. Photoinduced motions in azo-containing polymers. Chem Rev2002; 102: 4139–4176.
4.
YesodhaSKSadashiva PillaiCKTsutsumiN. Stable polymeric materials for nonlinear optics: a review based on azobenzene systems. Prog Polym Sci2004; 29: 45–74.
5.
Schab-BalcerzakESobolewskaAMiniewiczA.Comparative study of newly synthesized azo-dye bearing poly (esterimide)s with their poly(etherimide analogues. Light-induced optical anisotropy. Opt Mater2008; 31: 405–411.
6.
Schab-BalcerzakEGrucela-ZajacMKozanecka-SzmigielASwitkowskiK. Poly(etherimide and poly(esterimide)s containing azobenzene units: characterization and study of photoinduced optical anisotropy. Opt Mater2012; 34: 733–740.
7.
CreangaAHurducNPokolGNovákCAlazaroaieSHurducN. The degradation mechanism using TG-MS technique of some aromatic polyethers containing flexible spacers. J Therm Anal Calorim2002; 70: 877–887.
8.
BrumaMSavaIDamaceanuMDBelomoinaNMRobisonJ. New polyimides containing siloxane groups in the main chain. Rev Roum Chim2008; 53(9): 803–811.
WangJZhanYFangJGaoH. Nonisothermal degradation kinetics for epoxy resin systems containing polymethylphenylsilsesquioxane. J Appl Polym Sci2012; 123: 1024–1031.
11.
LisaGEneaRHurducNHurducN. Azopolysiloxanes modified with nucleobases:1. Thermal characterization of some nanostructurable materials with potential application in biology. High Perform Polym2009; 21: 340–352.
12.
AncaMMLuciaOApostolescuNMoldoveanuC. TG–FTIR study on thermal degradation in air of some new diazoaminoderivatives. J Therm Anal Calorim2010; 100: 615–622.
13.
FarongHXueqiuWShijinL. Thermal stability of polyetherimide. Polym Degrad Stab1987; 18: 247–259.
14.
RegnierNGuibeC. Methodology for multistage degradation of polyimide polymer. Polym Degrad Stab1997; 55: 165–172.
15.
SanthanaGKPRohitHVVeeramaniaSGoheSHChungaTS. Kinetic of thermal degradation of 6FDA based copolyimides-I. Polym Degrad Stab2002; 75: 273–285.
16.
LiLQGuanCXZhangAQChenDHQingZB. Thermal stabilities and thermal degradation kinetics of polyimides. Polym Degrad Stab2004; 84: 369–373.
17.
LuaACSuJ. Isothermal and non-isothermal pyrolysis kinetics of Kapton polyimide. Polym Degrad Stab2006; 91: 144–153.
18.
Marinovic-CincovicMBabicDDzzunuzovicEPopov-PergalKRancicM.Thermal, oxidative and radiation stability of polyimides. Part IV: polyimides based on N-[4-benzoyl-2-(2,5-dioxo-2,5-dihydropyrrol-1-yl)-phenyl]-acetamide and different diamines. Polym Degrad Stab2007; 92: 1730–1736.
19.
HamciucCVlad BubulacTPetreusOLisaG. Kinetics of thermal degradation in non-isothermal conditions of some phosphorus-containing polyesters and polyesterimides. Eur Polym J2007; 43: 980–988.
20.
SavaISacarescuLStoicaIApostolIDamianVHurducN. Photochromic properties of polyimide and polysiloxane azopolymers. Polym Int2009; 58: 163–170.
21.
AdamczakADSpriggsAAFitchDMAwadWWilkieCAGrunlanJC. Thermal degradation of high-temperature fluorinated polyimide and its carbon fiber composite. J Appl Polym Sci2010; 115: 2254–2261.
22.
FreemanESCarrollB. The application of thermoanalytical techniques to reaction kinetics. J Phys Chem1958; 62: 394–397.
FlynnJHWallLA. A quick direct method for the determination of activation energy from thermogravimetric data. J Polym Sci C Polym Lett1966; 4: 323–328.
25.
OzawaTA. A new method of analyzing thermogravimetric data. Bull Chem Soc Jpn1965; 38: 1881–1886.
26.
CoatsAWRedfernJP. Kinetic parameters from thermogravimetric data. Nature1964; 201: 68–69.
27.
FriedmanHL.Kinetics of thermal degradation of char-forming plastics from thermogravimetry. Application to a phenolic plastics. J Polym Sci: C1965; 6: 83–195.
28.
VyazovkinSBurnhamAKCriadoJMPérez-MaquedacLAPopescuCSbirrazzuoliN. ICTAC kinetics committee recommendations for performing kinetic computations on thermal analysis data. Thermochim Acta2011; 520: 1–19.
29.
SavaIBurescuABrumaMLisaG. Synthesis and thermal behavior of polyimides containing pendent substituted azobenzene units. Mater Plast2011; 48: 303–307.
30.
Schab-BalcerzakESapichBStumpeJ. Photoinduced optical anisotropy in new poly(amide imide)s with azobenzene units. Polymer2005; 46: 49–59.
31.
Schab-BalcerzakESiwyMKawalecMSobolewskaAChameraAMiniewiczA. Synthesis, characterization and study of photoinduced optical anisotropy in polyimides containing side azobenzene units. J Phys Chem A2009; 113: 8765–8780.
32.
HurducNDamianCTarusAToaderVHurducN. Thermal behavior of some aromatic copolyethers containing a propylenic spacer. Cent Eur J Chem2005; 3: 53–62.
33.
SavaIResmeritaAMLisaGDamianVHurducN. Synthesis and photochromic behavior of new polyimides containing azobenzene side groups. Polymer2008; 49: 1475–1482.
34.
PopescuC. Integral method to analyse the kinetics of heterogeneous reactions under nonisothermal conditions. A variant on the Ozawa–Flynn–Wall method. Thermochim Acta1996; 285: 309–323.
