Study of stability of high‐temperature polyimides using TG/MS technique

Xie, Wei; Heltsley, Rebecca; Cai, Xinhua; Deng, Fuquan; Liu, Jiemin; Lee, Charles; Pan, Wei‐Ping

doi:10.1002/app.2288

Cited by 32 publications

(15 citation statements)

References 8 publications

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“…Similar isothermal TGA studies at the initial degradation temperature for the thermal-oxidative stability behavior of the polymers were also previously reported by others [10,[37][38][39]. The content of fillers such as 0.1 wt.% used in this work, was also determined by the isothermal TGA results of the PK composites because the PK composites containing 0.1 wt.% of HP-GO showed larger residual weight% than other PK composites containing 0.05, 0.2, and 0.5 wt.% of HP-GOs when they were isothermally treated at 250°C for 2 h, as shown in Fig.…”

Section: Thermal Propertiessupporting

confidence: 65%

“…The effect of the different carbon nanomaterials on the thermal properties of PK was further studied by observing the weight changes at the initial degradation temperature of PK (250°C) known as the isothermal TGA [14,37]. Similar isothermal TGA studies at the initial degradation temperature for the thermal-oxidative stability behavior of the polymers were also previously reported by others [10,[37][38][39].…”

Section: Thermal Propertiesmentioning

confidence: 95%

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Effect of antioxidant grafted graphene oxides on the mechanical and thermal properties of polyketone composites

Lim

Kim

et al. 2015

European Polymer Journal

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Section: Thermal Propertiessupporting

confidence: 65%

Section: Thermal Propertiesmentioning

confidence: 95%

Effect of antioxidant grafted graphene oxides on the mechanical and thermal properties of polyketone composites

Lim

Kim

et al. 2015

European Polymer Journal

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“…6, the rapid weight loss above 490°C may result from solvent evaporation and imidization. A complete decomposition took place at 585°C [4,15].…”

Section: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

Synthesis and characterization of polyimide thin films obtained by thermal evaporation and solid state reaction

Al-Ajaj

Kareem

2016

Materials Science-Poland

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In this research polyimide films were prepared by physical vapor deposition (PVD), using solid state reaction of pyromellitic dianhydride (PMDA) and p-phenylene diamine (PDA) to form poly(amic acid) (PAA) films. The resultant films were converted to polyimide by thermal treatment, usually below 300 • C. For this study, a FT-IR spectrometer has been used to measure the effect of imidization temperature on the chemical structure of the vapor-deposited thin films of aromatic PI. When temperature increased, an increase in all absorption peaks was observed. This suggests that residual PAA monomers continued to be converted into PI. The surface topology of the PI films obtained at imidization temperatures of 150, 200, 250 • C for 1 hour was further examined by using AFM atomic force microscopy. It can be clearly seen that the surface became rougher with increasing imidization temperature. The thermal stability of polyimide was also studied by using thermogravimetric analysis (TGA).

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“…4.0x10 5 6.0x10 5 8.0x10 5 1.0x10 6 1.2x10 6 1.4x10 6 1.6x10 6 1.8x10 6 2. appear as a consequence of the polymer fragmentation and was also identified by other authors [3,[59][60][61][62]. Phenyl isocyanate (m/z=119) detected in a relatively low concentration in the pyrolizates was evidenced in the decomposition products of similar polyimide structures and may be formed by fragmentation and rearrangements of imide group [3,36,60,62,63]. In addition to evolution of physically adsorbed from the polymer, the scission of the ether groups also release water.…”

Section: Py-gc-ms Studies Of Polyimides and Their Thermal Decompositimentioning

confidence: 53%

Thermal decomposition of polyimides containing phosphine-oxide units

Butnaru

Varganici²,

Pinteală³

et al. 2018

Journal of Analytical and Applied Pyrolysis

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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.

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Study of stability of high‐temperature polyimides using TG/MS technique

Cited by 32 publications

References 8 publications

Effect of antioxidant grafted graphene oxides on the mechanical and thermal properties of polyketone composites

Effect of antioxidant grafted graphene oxides on the mechanical and thermal properties of polyketone composites

Synthesis and characterization of polyimide thin films obtained by thermal evaporation and solid state reaction

Thermal decomposition of polyimides containing phosphine-oxide units

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