SPECTROSCOPIC INVESTIGATION OF PYROLYSIS PRODUCTS OF SOME POLYSTYRENES

1992-03-01
ORHAN, BO
YALCIN, T
SUZER, S
An investigation of the pyrolysis products of some polystyrenes prepared by different methods is performed by Mass and IR spectroscopic techniques over the temperature range 30-450-degrees-C. Main pyrolysis product of the polystyrene samples obtained by a free radical initiator and gamma-rays is found to be styrene; whereas, toluene, ethylene and methane are observed as the pyrolysis products of plasma initiated polystyrene. The results demonstrate the dependence of pyrolysis products on polymer structure.
JOURNAL OF MOLECULAR STRUCTURE

Suggestions

Thermal degradation of polystyrene composites. Part I. The effect of brominated polyepoxy and antimony oxide
Kaya, Hatice; Hacaloğlu, Jale (2014-01-01)
Thermal degradation of polystyrene (PS) involving brominated polyepoxy (BA) and antimony oxide (PS/BE/Sb2O3) was studied systematically via direct pyrolysis mass spectrometry. Thermal decomposition of brominated polyepoxy was started by loss of end groups. The relative yields of high mass thermal degradation products of PS and the product distribution of brominated polyepoxy and antimony oxide were changed noticeably during the pyrolysis of PS/BE/Sb2O3 composite. Its thermal decomposition was initiated by t...
Calorific value determination of coals by DTA and ASTM methods. Comparative study
Kök, Mustafa Verşan (2001-08-20)
This research comprises the applicability of complex thermal analysis technique (TG/DTG, DTA) in the determination of calorific values of coals of different origin. The calorific values, those obtained by thermal analysis are compared with an adiabatic bomb calorimeter by the standard ASTM method, and the results are discussed.
Analysis of polymers using evolved-gas and direct-pyrolysis techniques
Fares, Mohammed M.; Yalcin, Talat; Hacaloğlu, Jale; Gungor, Atilla; Suzer, Sefik (1994-12-01)
Thermal analysis of polystyrene, poly(p-methylstyrene) and poly(a-methylstyrene) has been carried out using evolved-gas analysis by infrared and mass spectrometry, and directpyrolysis analysis by mass spectrometric techniques. Evolved-gas analysis, both by infrared and mass spectrometry, reveals features due mainly to the corresponding monomers or stable, volatile, and low relative molecular mass degradation products. In direct-pyrolysis mass spectrometry, however, primary decomposition products and heavier...
Polylactide/organically modified montmorillonite composites; effects of organic modifier on thermal characteristics
Ozdemir, Esra; Öztürk, Yurdagül; Hacaloğlu, Jale (2016-12-01)
The effects of interspace distance and the possible chemical interactions between PLA and the organic modifier of montmorillonites, Cloisite 15A, 20A and 30B on thermal degradation of PLA in the absence and presence of water vapor were investigated by direct pyrolysis mass spectrometry, (DP-MS) in addition to XRD, TEM, DSC, TGA analyses. The DP-MS results clearly showed that the way in which the polymer was incorporated into the nanocomposite strongly depends on the mixing technique, the interspacing betwee...
Experimental research on in-tube condensation under steady-state and transient conditions
Tanrikut, A; Yesin, O (2005-01-01)
In this research study, in-tube condensation in the presence of air was investigated experimentally at a heat exchanger of countercurrent type for different operating conditions. The test matrix for the steady-state condition covers the range of pressures P = 1.8 to 5.5 bars, vapor Reynolds numbers Re, = 45 000 to 94 000, and inlet air mass fraction values Xi = 0 to 52%. The effect of air manifests itself by a reduction in the local heat flux and the local heat transfer coefficient. The local heat transfer ...
Citation Formats
B. ORHAN, T. YALCIN, and S. SUZER, “SPECTROSCOPIC INVESTIGATION OF PYROLYSIS PRODUCTS OF SOME POLYSTYRENES,” JOURNAL OF MOLECULAR STRUCTURE, pp. 135–140, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66618.