Fourier-transform infrared polyurethanes

These polyurethanes (and their precursors or analogues) were cast from an appropriate solvent, usually DMF, onto the glass bead surfaces used in the in vitro test for platelet retention (4), or for the thrombin absorption test used previously (2). Crystals of KBr for Fourier transform infrared (FTIR) spectroscopy and glass microscopic slides for examination by XPS (ESCA) served as supports for polymers cast from the same solvents. Concentration of polymer (5 wt %), temperature of casting... 

G.A. Senich, WJ. MacKnight, Fourier transform Infrared thermal analysis of a segmented polyurethane. Macromolecules 13 (1) (1980) 106-110. 

Journal of Applied Polymer Science 59, No.9, 28th Feb.1996, p.1417-26 POLYMERISATION KINETICS OF POLYURETHANE AND VINYL ESTER RESIN INTERPENETRATING POLYMER NETWORKS BY USING FOURIER TRANSFORM INFRARED SPECTROSCOPY... 

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... 

Pad debris caused by polishing and wearing can be another type of consumable-related FM and PR as shown in Figure 17.5(e). The surface pore structure is visible under scanning electron microscope (SEM). Such pad debris are more prevalent in the case where soft polishing pads are used in conjunction with in situ or ex situ conditioning. Most CMP polishing pads are made of polymeric material such as polyurethane. As a result, in-line SEM and EDAX with elemental spectra alone would not yield sufficient information to identify the PR as pad debris. A more subtle off-line analytical technique such as Raman spectroscopy or Fourier transform infrared spectroscopy is required to determine the chemical components [6]. 

Coleman and Painter [4-6] consider hydrogen bonding as the central strong interaction in polymers that cause the observed phase behavior and miscibility. They have used Fourier transform infrared (FTIR) spectroscopy to study the hydrogen bonding in polymer blends in systems such as polyamides and polyurethanes. A large class... 

It has been well established by Cooper and Tobolsky that the unique properties of polyurethanes are strongly linked to its two-phase morphology [21], Characterization of microphase separation is performed using a variety of techniques including dynamic mechanical thermal analysis (DMTA), Fourier transform infrared spectroscopy (FTIR), small-angle X-ray scattering (SAXS), and atomic force microscopy. Consideration of both the thermodynamic driving forces and the kinetics is needed to elucidate microstructure formation in polyurethanes [60-66],... 

This paper concerns the preparation and the thermomechanical properties of environmentally compatible polymers derived from saccharides and lignins at our laboratory. The above research results have been obtained over the last several years. The environmentally compatible polymers include polyurethane (PU) and poly(8-caprolactone) (PCL) derivatives. PU derivatives were prepared from saccharides and lignins. PCL derivatives were synthesized from lignins, saccharides, cellulose and cellulose acetate. The thermal properties of the above polymers were studied by differential scanning calorimetry (DSC), thermogravimetry (TG) and TG-Fourier transform-infrared spectrometry (FTIR). Mechanical properties were measured by mechanical testing. 

Goddard R G and Cooper S L (1995) Polyurethane cationomers with pendant trimethylammonium groups. 1. Fourier transform infrared temperature studies. Macromolecules 28 1390-1400. 

Recently Benali et al. (2004) reported the development of a new laboratory-made system that allows the combination of rheometric (Alessi et al, 2005) and spectroscopic (Fourier-transform-near infrared (FT-NIR) spectroscopy) measurements for reactive polyurethane materials along the lines of these principles. 

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