DSC study of stabilization reactions in poly(acrylonitrile-co-itaconic acid) with peak-resolving method

Ouyang, Qing; Cheng, Liang; Wang, H. J.; Li, K. X.

doi:10.1007/s10973-007-8773-5

Cited by 35 publications

(24 citation statements)

References 8 publications

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“…Other studies that evaluated PAN fibers spun by the wet and dry spinning process, using solvents such as DMSO and DMF, also found similar results [28,29] .…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 60%

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

et al. 2015

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SbstractA low cost and environmental friendly extrusion process of the Polyacrylonitrile (PAN) polymer was viabilized by using the 1,2,3-propanetriol (glycerol) as a plasticizer. The characterization of the fibers obtained by this process was the object of study in the present work. The PAN fibers were heat treated in the range of 200 °C to 300 °C, which is the temperature range related to the stabilization/oxidation step. This is a limiting phase during the carbon fiber processing. The characterization of the fibers was made using infrared spectroscopy, thermal analysis and microscopy. TGA revealed that the degradation of the extruded PAN co-VA fibers between 250 °C and 350 °C, corresponded to a 9% weight loss to samples analyzed under oxidizing atmosphere and 18% when the samples were analyzed under inert atmosphere. DSC showed that the exothermic reactions on the extruded PAN co-VA fibers under oxidizing synthetic air was broader and the cyclization started at a lower temperature compared under inert atmosphere. Furthermore, FT-IR analysis correlated with thermal anlysis showed that the stabilization/oxidation process of the extruded PAN fiber were coherent with other works that used PAN fibers obtained by other spinning processes.

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“…Other studies that evaluated PAN fibers spun by the wet and dry spinning process, using solvents such as DMSO and DMF, also found similar results [28,29] .…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 60%

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

et al. 2015

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“…As listed in Table 3, both the initial temperature (T i ) and peak temperature (T pk ) increase significantly with the increase of heating rate. This phenomenon has been also reported in the literatures and generally attributed to the delay of heat transfer [28].…”

Section: Dsc Analysis At Different Heating Ratessupporting

confidence: 71%

“…The plot of A 1715cm -1 /A 2243cm copolymers prepared by solution polymerization as reported in the literatures [13,25,28]. Interestingly, the exothermic peak located at about 250 o C (Peak 1) grows significantly with the increase of IA content in feed.…”

Section: Characterization Of the Pan Polymers By Ftirmentioning

confidence: 66%

“…Thus, this peak may be assigned to the cyclization reaction which is initiated by the IA comonomer. This kind of cyclization reaction is generally considered to be followed an ionic mechanism at a lower temperature [13,25,28]. When the thermal stabilization is carried out at lower temperature, it helps to avoid excessive heat eruption and obtain a homogeneous stabilized structure.…”

Section: Characterization Of the Pan Polymers By Ftirmentioning

confidence: 99%

“…It may be mainly contributed to the oxidation reaction which is a major factor leading to weight gain through the generation of oxygen-bearing groups. The introduction of oxygen element through the oxygen uptake reactions has offset partial weight loss [28,32].…”

Section: Dsc/tg Analysis Under Different Atmospheresmentioning

confidence: 99%

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Simultaneous DSC/TG analysis on the thermal behavior of PAN polymers prepared by aqueous free-radical polymerization

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Studies on the Amidoximation of Polyacrylonitrile Films: Influence of Synthesis Conditions

Mishra

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Chemical transformation of acrylic membranes with hydroxylamine hydrochloride (HA) was carried out to introduce amidoxime groups. It was found that the reaction conditions, such as reaction time, HA concentration and temperature influence the amidoxime content, significantly. A sharp enhancement in the amidoximation at 80 C was observed. The FTIR studies showed a significant loss of nitrile groups during amidoximation process. Optimum conditions for the amidoximation process were investigated.

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DSC study of stabilization reactions in poly(acrylonitrile-co-itaconic acid) with peak-resolving method

Cited by 35 publications

References 8 publications

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

Simultaneous DSC/TG analysis on the thermal behavior of PAN polymers prepared by aqueous free-radical polymerization

Studies on the Amidoximation of Polyacrylonitrile Films: Influence of Synthesis Conditions

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