Thermogravimetric analysis - Fourier transform infrared spectroscopy

Thermogravimetric analysis - Fourier transform infrared spectroscopy Perkin Elmer Corporation PL Thermal Sciences Inc. [Pg.410]

Thermogravimetric Analysis - Fourier-Transform Infrared Spectroscopy... [Pg.201]

In this study, we successfully obtained a monomeric, a-Keggin mowo-aluminum-substituted polyoxotungstate in the form of crystals (suitable for X-ray structure analysis) of [(n-C4H9)4N]4[a-PWii Al(OH2))Q39] that were fully characterized by X-ray crystallography elemental analysis thermogravimetric/differential thermal analysis Fourier transform infrared spectroscopy and solution 3iP, 27 1, and nuclear magnetic resonance... [Pg.594]

Comparison of several techniques (namely Fourier transform infrared spectroscopy (FTIR), simultaneous thermogravimetric analysis-differential scanning calorimetry (TGA-DSC) and ultrasonic spectroscopy) for assessing the residual physical and mechanical characteristics of polymer matrix composites (PMCs) exposed to excessive thermal loads showed the measured power spectra of ultrasonic energy to correlate with performance of graphite fibre epoxy matrix composites exposed to thermal degradation, and also that analyses with the three techniques all pointed to the same critical temperature at which thermally induced damage increased sharply [58],... [Pg.365]

The hydrophobic matrix (pure silica) and the sol-gel-encapsulated CGTase, produced fixim the precursor TEOS were characterized by thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). [Pg.317]

Programmable fnmaces may be interfaced to a gas chromatograph, generally with some sort of intermediate trapping, bnt are rarely interfaced directly to spectroscopic techniqnes. Thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy (TGA-FT-IR) is an important exception, since many thermal units are capable of heating samples to pyrolysis temperatnres, with the resnlting pyrolysate swept directly into the cell of the FT-IR."... [Pg.40]

AFM, atomic force microscopy DMA, dynamic mechanical analysis DSC, differential scanning calorimetry flVR, oxidized natural rubber FTIR, Fourier transform infrared spectroscopy NR, natural rubber PLA, poly(lactic acid) QP, quaternary phosphonium salt TGA, thermogravimetric anal is TPU, thermoplastic polyurethane XPCL, end-carboxylated teledielic... [Pg.85]

Information on standard methods for the determination of the properties of polymers is reviewed in Table 4.1. General reviews of the determination of thermal properties have been reported by several workers [1-6]. These include application of methods such as dynamic mechanical analysis [5], thermomechanical analysis [5], differential scanning calorimetry [4], thermogravimetric analysis [6], and Fourier transform infrared spectroscopy [4], in addition to those discussed below. [Pg.95]

X-ray diffraction analysis (XRD) Fourier transform infrared spectroscopy (FT-IR, FT-IR image) Thermogravimetric analysis (TGA), differential thermal analysis (DTA) Mossbauer spectroscopy Light microscopy Transmission electron microscopy (TEM)... [Pg.419]

Dan and co-workers [8] studied the structures and thermal and thermo-oxidative stabilities of the gel and chlorinated natural rubber from latex. The polymers were analysed by chemical analysis, high-resolution pyrolysis-gas chromatography-mass spectroscopy (HR-Py-GC-MS) coupled with Fourier-transform infrared spectroscopy, and thermal analysis techniques [dynamic thermal analysis and thermogravimetric analysis (TGA)]. [Pg.89]

The thermal characterisation of elastomers has recently been reviewed by Sircar [28] from which it appears that DSC followed by TG/DTG are the most popular thermal analysis techniques for elastomer applications. The TG/differential thermal gravimetry (DTG) method remains the method of choice for compositional analysis of uncured and cured elastomer compounds. Sircar s comprehensive review [28] was based on single thermal methods (TG, DSC, differential thermal analysis (DTA), thermomechanical analysis (TMA), DMA) and excluded combined (TG-DSC, TG-DTA) and simultaneous (TG-fourier transform infrared (TG-FTIR), TG-mass spectroscopy (TG-MS)) techniques. In this chapter the emphasis is on those multiple and hyphenated thermogravimetric analysis techniques which have had an impact on the characterisation of elastomers. The review is based mainly on Chemical Abstracts records corresponding to the keywords elastomers, thermogravimetry, differential scanning calorimetry, differential thermal analysis, infrared and mass spectrometry over the period 1979-1999. Table 1.1 contains the references to the various combined techniques. [Pg.2]

A combination of techniques, such as powder X-ray diffraction (XRD) [56, 58], thermogravimetric analysis (TGA) [57], differential thermal analysis (DTA) [57], X-ray photoelectron spectroscopy (XPS) [56, 58], scanning electron microscopy (SEM) [26, 57], Fourier transform infrared (FT-IR) spectroscopy [57, 58] and BET N2 adsorption measurements [67], was used for structural characterization of the enzyme-clay conjugates. [Pg.40]

Thermogravimetric analyzers may be connected to a variety of chemical analyzers to determine the exact composition ofthe outgassed materials as they are evolved. Among chemical analysis methods are gas chromatography, infrared spectroscopy, and mass spectroscopy for example, a TGA apparatus may be coupled with a Fourier Transform Infrared (FTIR) spectrophotometer to measure the thermal oxidative stabilities of several fluorinated polyimides. [Pg.416]

Rao and co-workers [82] used an inverted emulsion process for the synthesis of the emeraldine salt of PAM using a novel oxidising agent, benzoyl peroxide. The polymerisation was carried out in a non-polar solvent in the presence of four different protonic acids as dopants and an emulsifier (sodium lauryl sulfate). The polymer salts were characterised spectroscopically by ultraviolet-visible, Fourier-transform infrared, Fourier-transform Raman and electron paramagnetic resonance spectroscopy. Thermogravimetric analysis, was used to determine the stability of the salts and the activation energy for the degradation. The conductivity of the salts was found to be in the order of 10 S/cm. [Pg.112]