Volatile products from thermal analyzers

Study of Volatile Products from Thermal Analyzers. The MC-2 mass chromatograph is ideally suited for thermal analysis or pyrolysis studies for the obvious reasons of quantitative and qualitative analysis and also for its unique trapping assembly. With the traps, sample effluents can be collected and concentrated over extended periods of time prior to analysis. 

It becomes obvious after analyzing the above results that the introduction of the organoclay into the polymer increases the thermal stabihty of the latter according the (1) thermal isolating effect from the clay layers and (2) barrier effect in relation to the volatile products of destmction. 

In this work, alkyl pyridinium, itnidazolium and phosphonium cationic surfactants were used to produce highly thermally stable organoclays. The volatile products issued from the thermal decomposition of those organoclays were analyzed by mass spectroscopy (MS). The organoelays were compounded with LLDPE and an appropriate compatibilizer. The micro- and nanodispersions were investigated through X-ray diffraction (XRD) and electron microscopy (SEM, TEM). The thermal stability of the nanocomposites was evaluated by thermogravimetric analysis (TGA). 

Electrochemists often use mass spectrometry as a tool for the identification of electrolysis products ex situ, but the approach is conventional and requires no amplification here. Mass spectrometry (MS) can also be used to sample volatile species produced at a porous electrode connected directly to a mass spectrometer. Alternatively, the solution in the electrochemical cell can be introduced into the mass spectrometer inlet by a thermospray or electrospray approach. Moreover, electrodes can be removed from the cell and introduced into a UHV chamber and their surface examined by MS using conventional desorption techniques, such as laser or thermal desorption, or bombardment of the surface with an ion beam (secondary-ion mass spectrometry or SIMS) to produce the ions that are mass-analyzed. 

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