On the thermal stability of some aromatic-aliphatic polyimides

Varganici, Cristian–Dragos; Roşu, Dan; Barbu-Mic, Cristian; Roşu, Liliana; Popovici, Dumitru; Hulubei, Camelia; Simionescu, Bogdan C.

doi:10.1016/j.jaap.2015.02.031

Cited by 28 publications

(12 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These methods use shifts in thermograms with heating rate increase, due to temperature delay as a function of heating rate [26][27][28][29][30][31].…”

Section: Thermal Decomposition Kineticsmentioning

confidence: 99%

TGA/DTA–FTIR–MS coupling as analytical tool for confirming inclusion complexes occurrence in supramolecular host–guest architectures

Varganici¹,

Marangoci²,

Roşu³

et al. 2015

Journal of Analytical and Applied Pyrolysis

Self Cite

View full text Add to dashboard Cite

“…These methods use shifts in thermograms with heating rate increase, due to temperature delay as a function of heating rate [26][27][28][29][30][31].…”

Section: Thermal Decomposition Kineticsmentioning

confidence: 99%

TGA/DTA–FTIR–MS coupling as analytical tool for confirming inclusion complexes occurrence in supramolecular host–guest architectures

Varganici¹,

Marangoci²,

Roşu³

et al. 2015

Journal of Analytical and Applied Pyrolysis

Self Cite

View full text Add to dashboard Cite

“…The variation of E with α underlines the complexity of the polyimides decomposition mechanisms [46,55]. Most probably, the decomposition in these polymers is initiated from cleavage of the weaker P-C bonds and continues with the decomposition of the macromolecular backbone, so that volatile compounds are produced at moderate α and char residue yield at higher α values.…”

Section: Non-isothermal Decomposition Kineticsmentioning

confidence: 98%

“…The study of polymer thermal decomposition has been used not only for the evaluation of global kinetic parameters and of thermal resistance but also has guided improvements in their backbone chemistry [36]. There are numerous studies on the decomposition behaviour of polyimide in the literature [37][38][39] It is evidenced that the pyrolysis pathway [40][41][42] and kinetics [43][44][45][46] of aromatic polyimides requires a temperature of more than 500°C and produces a low value CO-and CO 2 -rich gas as well as more than 50 wt% carbonized solid [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of polyimides containing phosphine-oxide units

Butnaru

Varganici²,

Pinteală³

et al. 2018

Journal of Analytical and Applied Pyrolysis

Self Cite

View full text Add to dashboard Cite

This work details analyses of the thermal decomposition behaviour of three phosphine-oxide containing aromatic processable polyimides. The polymers exhibited high thermal stability with initial decomposition temperatures in the range of 473-483°C and a char residue at 900°C in the domain of 48.6-58.4%. The values of non-isothermal decomposition kinetic parameters were determined using the Friedman isoconversional method, as recommended by the Kinetics Committee of the International Confederation for Thermal Analysis and Calorimetry (ICTAC). The data evidenced a complex decomposition process of the main chain, being probably initiated by the cleavage of the weaker P-C bonds, followed by the decomposition of the macromolecular backbone. The volatile products formed during the thermal decomposition of polyimides were analysed by TGA-FTIR. All spectra evidenced peaks associated with water, CO 2 , CO and aliphatic and aromatic decomposition products predominant from 500° to 800°C. By using Py-GC-MS studies the fragments originating from the thermal decomposition of the polyimides up to 600°C were identified. Based on these data, it was suggested that the thermal decomposition pathways of the three polyimides undergoes the same mechanism. Additionally, an oversimplified decomposition mechanism for the polyimides was proposed. The morphology of the char residue obtained after TGA experiments showed a continuous and dense structure. The EDX mapping identified the C, N, O and P atoms uniformly dispersed in the residual char surface.

show abstract

“…[19][20][21] Many of these aromatic polymers have been commercialized, such as aromatic polyamides, polyimides, polyesters, polysulfones, and heterocyclic polymers. [22][23][24][25][26][27] This method can also be applied to the modication of polymeric uid loss additives. Polymeric uid loss additives with high temperature resistance usually tend to contain more aromatic units in their structure.…”

Section: Introductionmentioning

confidence: 99%