Pyrolysis-Gas Chromatographic Technique for Direct Analysis of Thermal Degradation Products of Polymers.

Abstract

b The pyrolysis-gas chromatographic technique was modified to determine both the characteristic pattern and the identity and quantity of the breakdown products of nitrocellulose, poly(n-butyl methacrylate), and poly(viny1 alcohol). The pyrolysis of these polymers was carried out at 650" C. in a helium atmosphere. The tabulated qualitative and quantitative data of the breakdown products are specific for the various polymers and can also be related to the structure of the original macromolecule.HE STUDY of the thermal degrada-

Pyrolysis-gas chromatography/mass spectrometry for the forensic fingerprinting of silicone engineering elastomers

“…'Thermal Analysis' is something of a catchall term used to describe a suite of techniques including thermal gravimetry (TG), differential scanning calorimetry (DSC), pyrolysis and so on. Pyrolytic analysis and gravimetry have been used extensively for the analysis of 'unknown' polymeric materials for many years [10][11][12][13]. The temperature at which a polymeric material degrades, the mechanism and the products of the thermal degradation are all a function of its underlying chemical structure and even physical morphology.…”

Applications of Modern Pyrolysis Gas Chromatography for the Study of Degradation and Aging in Complex Silicone Elastomers

“…And indeed, various incarnations of pyrolytic analysis and gravimetry have been used extensively for the analysis of 'unknown' polymeric materials for many years. [24][25][26][27] The temperature at which a Figure 2. Main: Illustration of the complex relationship between materials properties/performance and structure over a range of size scale, from atomistic to a macro-scale.…”

Apparatus which permits repeated gas-liquid chromatographic separations of a sample

“…The combination of a hot-filament or reaction vessel pyrolysis unit in line with a gas-liquid chromatograph (GLC) has been used very much in recent years to study the degradation of many polymers (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). This system offers three important advantages: the pyrolysis products are quickly removed from the pyrolysis chamber by the carrier gas of the GLC, thereby reducing the risk of further decomposition; there are no transfer losses between the pyrolysis unit and the GLC; and plug flow results-i.e., the pyrolysis products enter the GLC column in the concentrated state required for good peak resolution.…”