Thermal degradation of ABS

Cortemiglia, Maria Paola Luda Di; Camino, Giovanni; Costa, Luigi; Guaita, Marino

doi:10.1016/0040-6031(85)85048-6

Cited by 28 publications

(13 citation statements)

References 5 publications

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“…Nevertheless, in dynamic TG with constant heating rate, it is impossible to separate them. As it has been reported Luda di Cortemiglia et al [ 20 ], the SAN phase of ABS degrades in a single volatilization process with a maximum rate at 425 °C, and chain fragments, NH 3 , HCN, and aromatic compounds are generated. With regard to the butadiene phase, it degrades at higher temperatures in a two-step process.…”

Section: Introductionmentioning

confidence: 71%

Kinetic Analysis of the Thermal Degradation of Recycled Acrylonitrile-Butadiene-Styrene by non-Isothermal Thermogravimetry

et al. 2019

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This work presents an in-depth kinetic study of the thermal degradation of recycled acrylonitrile-butadiene-styrene (ABS) polymer. Non-isothermal thermogravimetric analysis (TGA) data in nitrogen atmosphere at different heating rates comprised between 2 and 30 K min−1 were used to obtain the apparent activation energy (Ea) of the thermal degradation process of ABS by isoconversional (differential and integral) model-free methods. Among others, the differential Friedman method was used. Regarding integral methods, several methods with different approximations of the temperature integral were used, which gave different accuracies in Ea. In particular, the Flynn-Wall-Ozawa (FWO), the Kissinger-Akahira-Sunose (KAS), and the Starink methods were used. The results obtained by these methods were compared to the Kissinger method based on peak temperature (Tm) measurements at the maximum degradation rate. Combined Kinetic Analysis (CKA) was also carried out by using a modified expression derived from the general Sestak-Berggren equation with excellent results compared with the previous methods. Isoconversional methods revealed negligible variation of Ea with the conversion. Furthermore, the reaction model was assessed by calculating the characteristic and functions and comparing them with some master plots, resulting in a nth order reaction model with n = 1.4950, which allowed calculating the pre-exponential factor (A) of the Arrhenius constant. The results showed that Ea of the thermal degradation of ABS was 163.3 kJ mol−1, while ln A was 27.5410 (A in min−1). The predicted values obtained by integration of the general kinetic expression with the calculated kinetic triplet were in full agreement with the experimental data, thus giving evidence of the accuracy of the obtained kinetic parameters.

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Section: Introductionmentioning

confidence: 71%

Kinetic Analysis of the Thermal Degradation of Recycled Acrylonitrile-Butadiene-Styrene by non-Isothermal Thermogravimetry

et al. 2019

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“…While ABS is a widely used polymer, with annual North American sales exceeding 1400 million pounds [15], little work has been published on its thermal degradation and degradation products. While the degradation kinetics and mechanism have been shown to be very much dependent upon the chemical structure of the co-polymer [16,17], the types of products produced are those expected from the molecular structure, i.e. acetonitrile, acrylonitrile, benzene, toluene, styrene, benzonitrile, etc.…”

Section: Pyrolysis Of Absmentioning

confidence: 99%

Pyrolysis of mixed plastics used in the electronics industry

Day

Cooney

Touchette-Barrette

et al. 1999

Journal of Analytical and Applied Pyrolysis

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The pyrolysis of three plastics used by the electronics industry has been studied using pyrolysis/gas chromatography/mass spectrometry (Py/GC/MS). The materials selected for this study were acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC) and polyoxymethylene (POM). The selection was based upon the analysis of several pieces of electronic equipment, which had been the subject of laboratory studies. Each polymer was pyrolyzed at two pyrolysis temperatures (700 and 900°C) alone, together (side by side) with polyvinyl chloride (PVC) in a 50/50 co-pyrolysis experiment, and as an intimate chemical blend with PVC (50/50). In addition the three polymers were also pyrolyzed in the presence of copper powder to determine the role of copper contamination on the pyrolysis of each polymer. The results of the study suggest that both the presence of PVC and copper can influence the extent of degradation and the pyrolysis product distribution obtained when these polymers are pyrolyzed. However, no significant changes were noted that could drastically influence the value of the pyrolysis products.

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“…In most fields of material research and industrial process controlling, especially polymer and polymer design industry, thermal analysis (TA) is used to characterize temperature-dependent material properties, evaluate thermodynamical conversions and thermo-physical parameters, as well as to observe chemical reactions. In addition to the differential methods, differential thermal analysis and differential scanning calorimetry, − which are mainly used to increase the sensitivity of the quantitative acquisition of caloric changes, Thermogravimetry (TG) has achieved a particular importance for the investigation of thermal decomposition. − However, for more advanced applications, a chemical analysis of the evolved gases is required. This can be done either by coupling of TG to a sequentially working analytical device such as a gas chromatograph, with or without mass spectrometric detector, (TG-GC) − or (TG-GC/MS) − or by coupling of on-line analytical technology.…”

mentioning

confidence: 99%

Thermogravimetry Coupled to Single Photon Ionization Quadrupole Mass Spectrometry: A Tool To Investigate the Chemical Signature of Thermal Decomposition of Polymeric Materials

et al. 2008

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Mass spectrometry (MS) is an established analytical technique to analyze evolved gas in thermogravimetry (TG). In this study, for the first time a novel SPI-MS technique using an electron beam pumped VUV excimer lamp as photon source (lambda = 126 nm) was employed in conjunction with thermogravimetry. The coupling was achieved with an improved heated interface and adjacent transfer capillary between TG and ion source of a quadrupole mass spectrometer. The feasibility of this approach was proven by investigating semivolatile substances such as long-chain alkanes (heptadecane C17H36), polymers, e.g., polystyrene, polycarbonate, and acrylonitrile-butadiene-styrene, polymer mixtures and blends. Mass spectra with almost no fragmentation were obtained, and quantification of selected substances could be achieved. Polymer mixtures could be distinguished by their SPI mass spectra, and the effect of premixing of polymers has been accessed. Its unique attributes render the TA-SPI-MS method a promising new tool for quantitative and qualitative evaluation of complex organic thermal degradation products.

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Thermal degradation of ABS

Cited by 28 publications

References 5 publications

Kinetic Analysis of the Thermal Degradation of Recycled Acrylonitrile-Butadiene-Styrene by non-Isothermal Thermogravimetry

Kinetic Analysis of the Thermal Degradation of Recycled Acrylonitrile-Butadiene-Styrene by non-Isothermal Thermogravimetry

Pyrolysis of mixed plastics used in the electronics industry

Thermogravimetry Coupled to Single Photon Ionization Quadrupole Mass Spectrometry: A Tool To Investigate the Chemical Signature of Thermal Decomposition of Polymeric Materials

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