Mass spectroscopy permeation analysis

GPC = gel permeation chromatography MS = mass spectroscopy Tg = glass transition temperature 7 = melting point TMA=thermomechanical analysis. 

Analyses of Pitch. Modern analytical facilities of high-pressure liquid chromatography, gel permeation chromatography, an(j 1 nuclear magnetic resonance and mass spectrometry, associated with 1R and UV spectroscopy enable a total molecular constituent analysis of pitch composition to be obtained. The use of such information could then possibly be the route to prediction of pitch quality on carbonization. It would appear that such an approach would not be successful (ignoring the cost factor for such detailed analysis). The pitch cannot be considered as an assembly of molecules which pyrolyse independently of each other. The pitch carbonizes as a multi-phase system and experience today would indicate the impossibility of predicting all interactions, physical and chemical. 

Mandolmi, L., Montaudo, G., Scamporrino, E., Roelens, S., and Vitalini, D., Or-ganotm-Mediated Synthesis of Macrocyclic Tetraesters. A Combined H-NMR Spectroscopy, Gel Permeation Chromatography, and Fast Atom Bombardment Mass Spectrometry Approach to Complete Product Analysis, Macromolecules, 22, 3275, 1989. 

All compounds have been characterized by IR, H and C-NMR spectroscopy and la and Ila further by analysis, mass specrometry and/or gel permeation chromatography on a 100A-5p-Styragel (500/7.7 mm column in... 

ADM Archer Daniels Midland Co. ML mass loss DSC Differential Scanning Calorimetry DS degrees of substitution DMA Dynamic Mechanical Analysis IR infra-red spectroscopy SEM Scanning Electron Microscopy > function of LDPE low-density polyethylene A studied by means of FTIR Fourier-transform IR Spectroscopy HV Hydroxyvalerate TG Thermogravimetric analysis GPC Gel Permeation Chromatography ... 

---