Kinetic analysis of the non-isothermal degradation of poly(vinyl chloride)/poly(ethylene oxide) blends

Jakić, Miće; Vrandečić, Nataša Stipanelov; Erceg, Matko

doi:10.1007/s10973-015-5096-9

Cited by 16 publications

(13 citation statements)

References 21 publications

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“…The apparent activation energy of this stage of thermal degradation of investigated PEO sample amounts in the range 160.0 -208.0 kJmol -1 which is slighty lower than one in the first stage. In our previous work [17] we concluded that the nonisothermal degradation of PEO in the whole conversion range occurs through four-stage degradation mechanism where by E value, conversion range and kinetic model ( Table 4) the fourth stage corresponds to this investigated second stage. Absence of two degradation stages, as in case of thermogravimetric analysis, may be accounted to different sample preparation conditions.…”

Section: Non-isothermal Degradation Kinetics Analysismentioning

confidence: 84%

“…3). In our previous study [17] we concluded that from the kinetical point of view PEO degradation can be adequately described by a four individual reaction models and pairs of Arrhenius parameters. This divergence can be attributed to different sample preparation conditions and to Ca/Zn stabilizer that was added in our previous work in order to prevent thermal degradation of samples during the preparation (Fig 2(b)).…”

Section: Non-isothermal Degradation Kinetics Analysismentioning

confidence: 92%

“…Likewise, Vrandečić et al [16] have calculated the empirical kinetic triplets for the non-isothermal degradation of PEO by combining use of isoconversional methods and invariant kinetic parameter method and concluded that the non-isothermal degradation of PEO in the conversion range 0.10 -0.90 occurs through a mechanism like those represented by the Avrami-Erofeev equation. Recently, in our previous work [17] by isoconversional Friedman (FR) method in combination with the multivariate non-linear regression method we concluded that the non-isothermal degradation of PEO in the whole conversion range occurs through four-stage degradation mechanism which can be described by the Avrami-Erofeev reaction type (An). Therefore, in this work the thermal properties of PHB/PEO blends were investigated by nonisothermal thermogravimetry in an inert atmosphere and its results were used for determination of thermal stability of polymers and kinetic analysis.…”

Section: Introductionmentioning

confidence: 99%

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Thermal degradation of poly(3-hydroxybutyrate)/poly(ethylene oxide) blends: Thermogravimetric and kinetic analysis

Jakić

Vrandečić

2016

European Polymer Journal

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Section: Non-isothermal Degradation Kinetics Analysismentioning

confidence: 84%

Section: Non-isothermal Degradation Kinetics Analysismentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal degradation of poly(3-hydroxybutyrate)/poly(ethylene oxide) blends: Thermogravimetric and kinetic analysis

Jakić

Vrandečić

2016

European Polymer Journal

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“…Authors of publication [21] observed constant activation energy (isothermal condition) of decomposition process for poly(vinyl chloride) (PVC). The dependence of apparent activation energy on conversion of PVC was obtained for non-isothermal condition [22,23]. The effect of measurement conditions in higher temperature on processes was also observed for 1,3,3-trinitroazetidine (TNAZ).…”

mentioning

confidence: 88%

“…The study was done for very low heating rates b = 0. The influence of measurement conditions on obtained values of kinetic parameters was also observed for another compound [21][22][23][24][25]. Authors of publication [21] observed constant activation energy (isothermal condition) of decomposition process for poly(vinyl chloride) (PVC).…”

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confidence: 97%

Thermal properties of TEX decomposition or sublimation

Gańczyk

Zygmunt

Gołofit

2016

J Therm Anal Calorim

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TEX is a thermostable compound and less sensitive to external stimuli. It sublimates and decomposes at high temperature. The influence of DSC and TG measurement conditions and substance mass on the thermal decomposition of TEX was determined. It was observed that substance mass, pan type and fulfillment degree of pan influence the thermal decomposition and kinetic parameters of TEX decomposition. Sublimation of the sample was the main observed process; thermal decomposition was the secondary process during the heating of TEX in open pans. With increasing substance mass, the participation of thermal decomposition of TEX increased. Uncontrolled thermal decomposition was observed for larger mass of a sample. The sublimation and decomposition processes were confirmed by FT-IR method. Thermal decomposition was the main process observed during heating the sample of TEX in hermetic pans. Sublimation of a sample was marginal. The sublimation effect decreased with increasing the degree of fulfillment pan. The kinetic parameters were determined with the Friedman's isoconversional method. The conversion, mass of sample and the type of pan caused the large changes in the values of kinetic parameters. The apparent activation energy varied from 128 to 355 kJ mol -1 and logA varied from 9.95 to 30.64 in initial step (a = 0.02) for different condition of measurements. The low values of apparent activation energy (about 130 kJ mol -1 ) were associated with sublimation process and the high values (about 340 kJ mol -1 ) with the decomposition process.

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Thermal stability and thermal degradation kinetics of short and long glass fiber reinforced PA10T composites

Guo

Wang

et al. 2018

Polymer Engineering & Sci

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In this work, the long glass fiber reinforced poly(decamethylene terephthalanide) (PA10T/LGF) composites and short glass fiber reinforced PA10T (PA10T/SGF) composites were prepared by two different extrusion processing methods, respectively. The results of mechanical properties reveal the introduction of glass fiber can improve the performance of the material, and the LGF reinforced PA10T composites can achieve much higher performance than the SGF reinforced ones at the same level of fiber contents. The thermal stabilities of neat PA10T, PA10T/SGF, and PA10T/LGF are investigated by nonisothermal TG analysis. The thermal degradation kinetics is introduced by using Kissinger and Flynn‐Wall‐Ozawa methods and the thermal degradation mechanism functions of the samples are calculated by the Coats‐Redfem model. The results show that the thermal stabilities of PA10T/SGF and neat PA10T are better than that of PA10T/LGF. In addition, the incorporation of glass fiber into PA10T do not have much effect on the reaction mechanism type of thermal degradation compared with that neat PA10T. Furthermore, the thermal stability analysis of the composites is verified by the computed results of Gibbs free energy (ΔG#). POLYM. ENG. SCI., 59:246–253, 2019. © 2018 Society of Plastics Engineers

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Kinetic analysis of the non-isothermal degradation of poly(vinyl chloride)/poly(ethylene oxide) blends

Cited by 16 publications

References 21 publications

Thermal degradation of poly(3-hydroxybutyrate)/poly(ethylene oxide) blends: Thermogravimetric and kinetic analysis

Thermal degradation of poly(3-hydroxybutyrate)/poly(ethylene oxide) blends: Thermogravimetric and kinetic analysis

Thermal properties of TEX decomposition or sublimation

Thermal stability and thermal degradation kinetics of short and long glass fiber reinforced PA10T composites

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