On the thermal decomposition of the copolymer ABS and of nylon polyamide

Fãtu, D.; Geambaş, Gabriela; Segal, E.; Budrugeac, P.; Ciutacu, S.

doi:10.1016/0040-6031(89)85279-7

Cited by 24 publications

(11 citation statements)

References 5 publications

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“…From an inspection of the DTG curves, it is clear that the main degradation of ABS takes place in two steps. The first degradation step corresponds to the loss of the volatile compounds [ 37 , 38 ]. The second step corresponds to the breaking of the stronger bonds from the reticulated product of the first step, referring mainly to the scission of C-C main chain bonds [ 38 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

“…The first degradation step corresponds to the loss of the volatile compounds [37,38]. The second step corresponds to the breaking of the stronger bonds from the reticulated product of the first step, referring mainly to the scission of C-C main chain bonds [38,39]. In Figure 9, it can be observed that the two degradation steps are consecutive and appear partially overlapping in the range 350-550 • C; in this research, to simplify the calculations, the separate steps will not be considered.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

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Effect of a Powder Mould in the Post-Process Thermal Treatment of ABS Parts Manufactured with FDM Technology

et al. 2021

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The post-process thermal treatment of thermoplastics improves their mechanical properties, but causes deformations in parts, making them unusable. This work proposes a powder mould to prevent dimensional part deformation and studies the influence of line building direction in part deformations in a post-process thermal treatment of 3D printed polymers. Two sets of ABS (acrylonitrile butadiene styrene) test samples manufactured by fused deposition modelling (FDM) in six different raster directions have been treated and evaluated. One set has been packed with a ceramic powder mould during thermal treatment to evaluate deformations and mould effectiveness. Thermogravimetric tests have been carried out on ABS samples, concluding that the thermal treatment of the samples does not cause degradations in the polymeric material. An analysis of variance (ANOVA) was performed to study internal building geometry and mould influence on part deformation after the thermal treatment. It can be concluded that powder mould considerably reduces dimensional deformations during the thermal treatment process, with length being the most affected dimension for deformation. Attending to the length, mould effectiveness is greater than 80% in comparison to non-usage of moulding, reaching 90% when the building lines are in the same direction as the main part.

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Section: Resultsmentioning

confidence: 99%

Section: Thermogravimetric Analysismentioning

confidence: 99%

Effect of a Powder Mould in the Post-Process Thermal Treatment of ABS Parts Manufactured with FDM Technology

et al. 2021

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“…The thermal degradation of the ABS/DBDE mixture and ABS proceeded in two steps, the first important one around 400°C, and the second one around 500°C. In the case of ABS, the latter step can be explained by different factors as indicated in [36], but also by degradation of crosslinked species formed during the first step [37].…”

Section: Thermal Analysis Of the Abs/dbde System Before And After Photodegradationmentioning

confidence: 99%

Photodegradation of Decabromo Diphenyl Ether Flame Retardant in Poly (Acrylonitrile Butadiene Styrene) (ABS)

Aldoori

Bouberka

Nadim

et al. 2020

Journal of Macromolecular Science, Part B

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Decabromodiphenylether (DBDE) is a brominated flame retardant which belongs to the group of polybromodiphenylethers (PBDEs) often used as a fire resistant additive in various well known polymeric systems like polystyrene, poly(acrylonitrile-butadiene-styrene) (ABS), polypropylene, etc. This compound can be considered as a persistent organic pollutant and presents certain risks for the environment owing to the fact that it is bioaccumulable and not biodegradable. A detailed investigation, described here, was carried out on the effect of ultraviolet/visible radiation on DBDE in ABS with the aim to study the photolytic reactions of this molecule in the solid state, in order to improve the economic and ecological treatment of brominated plastic waste from waste electrical and electronic equipment (WEEE). This study presents new aspects of the photochemical degradation of DBDE/ABS systems in the solid state. The photodegradation of DBDE in ABS was followed by Fourier transform infrared spectroscopy (FTIR) as well as by thermogravimetrical analysis (TGA). Good agreement was obtained for the results of both analytical methods in terms of the overall photolysis of DBDE.

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“…Thermal analysis methods (TG, DTG, DTA or DSC) are very useful in the solution of such problems as they permit the estimation of the temperature range of thermal stability [1][2][3][4][5][6], the values of the non-isothermal kinetic parameters of degradation [6][7][8][9][10][11][12][13][14][15][16][17][18] and the changes undergone as a consequence of the accelerated aging [2, 19, 201. In our previous papers [21][22][23] we have shown that the increase of oxygen pressure determines the acceleration of the isothermal thermomechanical degradation of ethylene+propylene rubber (elongation at break), glass-reinforced epoxy resin (flexural strength), and nitrile-butadiene rubber (elongation at break).…”

Section: Introductionmentioning

confidence: 99%

Thermooxidative degradation of an unsaturated polyester resin

Budrugeac¹,

Segal

1997

Journal of Thermal Analysis

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The results of non-isothermal kinetic analysis of the thermooxidative degradation in air and oxygen of an unsaturated polyester resin are presented. It has been shown that the thermooxidative degradation in oxygen occurs at lower temperatures than the thermooxidative degradation in air. The kinetic parameters of the thermooxidative degradation depend on the heating rate and the oxygen pressure. Two straight lines of lnA vs. E (,4 is the preexponential factor and E is the activation energy), characteristic for the compensation effect, have been obtained for the thermooxidative degradation in air and in oxygen respectively. The difference between the intercepts of these straight lines can be explained by dependence of the pre-exponential factor on the oxygen pressure.

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On the thermal decomposition of the copolymer ABS and of nylon polyamide

Cited by 24 publications

References 5 publications

Effect of a Powder Mould in the Post-Process Thermal Treatment of ABS Parts Manufactured with FDM Technology

Effect of a Powder Mould in the Post-Process Thermal Treatment of ABS Parts Manufactured with FDM Technology

Photodegradation of Decabromo Diphenyl Ether Flame Retardant in Poly (Acrylonitrile Butadiene Styrene) (ABS)

Thermooxidative degradation of an unsaturated polyester resin

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