Gas emission from chlorinated polymers induced by synchrotron radiation

Castro, C.S.C. de; Azevedo, A.C.P de; Monteiro, Elisabeth E. C.; Pinho, R.R.; Souza, G. G. B. de

doi:10.1016/s0141-3910(00)00151-8

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…Such strong emissions of HCl from PVC by laser or heating is in agreement with many other studies. [11][12][13] They have shown that the thermal degradation of PVC proceeds in the following two stages. The first stage proceeds in the temperature range of 470 to 640 K. It corresponds to dehydrochlorination with the subsequent formation of conjugated double bonds, as shown in Fig.…”

Section: Mass Spectroscopymentioning

confidence: 99%

Fundamental Characteristics of a Laser Ablation Microthruster

Koizumi

Inoue

Komurasaki

et al. 2007

Trans. Japan Soc. Aero. S Sci.

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The fundamental characteristics of a laser ablation microthruster were investigated for a 10 kg-class microspacecraft. A single-shot impulse measurement was performed using a thrust stand on which a prototype thruster was installed and the associate ablated mass was estimated from the pressure increase in the space chamber. The best performance of several polymer materials was obtained using polyvinylchloride as the propellant. More heavily carbon doped polyvinylchloride showed higher performance, which means absorption length has a large effect on performance. The intensity of the laser beam on the ablation material was changed using constant laser power, and it was shown that intensity had little effect on the performance. This qualitative behavior agreed with the results of a simple thermal analysis. Mass spectroscopy of the ablation plume showed that the dominant reaction was dehydrochlorination in the range of 470 to 640 K, and the low-temperature reaction resulted in the best performance for polyvinylchloride.

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Section: Mass Spectroscopymentioning

confidence: 99%

Fundamental Characteristics of a Laser Ablation Microthruster

Koizumi

Inoue

Komurasaki

et al. 2007

Trans. Japan Soc. Aero. S Sci.

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“…Synchrotron radiation is a very efficient source of light due to its high beam brilliance and excellent collimation. It has been previously applied as radiation source to the study of photochemical reactions on polymers (6). The SRS is a 2GeV electron storage ring, operated solely for the provision of synchrotron radiation (synchrotron light) for multiple simultaneous user experiments.…”

Section: Fig( 2 ) Schematic Layout Of the Daresbury Srsmentioning

confidence: 99%

Rydberg states and Molecular Photo- Absorption Spectrum of Vinyl Chloride

Al-Faydhi¹

2007

J.Edu.Sci.

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In this work, a comprehensive study of the molecular spectroscopy of vinyl chloride is reported. A high resolution VUV photo absorption spectrum of vinyl chloride has been measured using a synchrotron radiation in the range (5-11) eV (115 > λ > 250) nm. The excited Rydberg states of vinyl chloride were calculated using a software program. The photolysis has also been investigated to give an estimate of the life time in the atmosphere.

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“…Therefore, a new analytical technique with which a rapid evaluation can be made is desired, and several advanced methods have been reported [2,3]. On the other hand, some attempts to study products generated during photo, thermal, and oxidative degradation of polymers by using mass spectrometric detection [4] or gas chromatography (GC) [5] have been reported. Furthermore, a pyrolysis (Py)-GC/MS has been utilized as the method to obtain compositional information of deteriorated materials; wood plastic composite based on high density polyethylene and polypropylene [6], polypropylene nanocomposites [7], polyurethane sealants [8].…”

Section: Introductionmentioning

confidence: 99%