Poly compositional analysis

Since the late 1960 s a few papers have demonstrated compositional analysis of various polymer systans by Raman spectroscopy. For example, Boerio and Yuann (U) developed a method of analysis for copolymers of glycidyl methacrylate with methyl methacrylate and styrene. Sloane and Bramston-Cook (5) analyzed the terpolymer system poly(methyl methacrylate-co-butadiene-co-styrene). The composition of copolymers of styrene-ethylene dimethacrylate and styrene-divinylbenzene was determined by Stokr et (6). Finally, Water (7) demonstrated that Raman spectroscopy could determine the amount of residual monomer in poly(methyl methacrylate) to the % level. This was subsequently lowered to less than 0.1% (8). In spite of its many advantages, the potential of Raman spectroscopy for the analysis of polymer systems has never been fully exploited. 

A) Composition Analysis of Poly(3-methyl-l -butene) and Poly(4-methyl-1 -pentene) 68... 

C. M. Bruins, A.P. Compositional analysis of nitrile terminated poly(propylene imine) dendrimers by high-performance liquid chromatography combined with electrospray mass spectrometry. J. Chromatogr. A 1998, 825, 135-147. 

The use of NMR for the compositional analysis of crude oils and fractionated products is routine in industrial production. Common analyses include the determination of saturated and aromatic hydrocarbon content, average structural parameters such as the percentages of n-paraffins, / 6>-paraffins, cyclo-paraffins, mono-, di-, and poly aromatics. These data are used for the development of correlations between the compositions and their characteristics.Spectral editing such as DEPT is routinely used for the unambiguous assignments of resonances in complex mixtures, and recent trends indicate the utility of 2D-correlation techniques for such purpose. " In addition, NMR is used to determine additive constituents... 

Screening of estuarine and marine sediment samples by automated pyrolysis mass spectrometry combined with factor-discriminant analysis leads to a useful classification related to the geographical position and the sources of the organic matter. The mass spectral data give preliminary information about the organic matter composition. Analysis of the characteristic mass peaks m/z=86 and 100 by PMSMS and PGCMS points to bacterial poly-alkanoates in the mud fraction of the river sediments. 

Sato, H. Hoshino, M. Aoi, H. Ishida, Y. Aoi, K. Ohtani, H. Compositional analysis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by pyrolysis-gas chromatography in the presence of organic alkali. J. Anal. Appl. Pyrol. 2005, 74, 193-199. 

Lee D, Teraoka I, Fujiwara T, Kimura K. Composition analysis of poly(ethylene glycol)-poly(L-lactide) diblock copolymer studied by two-dimensional column chromatography. J Chromatogr A 2002 966 41-51. 

Table 7.49 - Compositional Analysis of Poly(methyl methacrylate-co-methacrtylic acid) by Titration and x NMR... 

SEC-NMR for the analysis of polymethacrylates. He studied isotactic PMMA with different molar masses to analyze the end-groups and the number average molar mass as well as the CCD of (methyl methacrylate)-co-(butyl methacrylate) copolymers. These polymers were studied at slow flow rates in fully deuterated solvents. Blends of isotactic and syndiotactic PMMA were also studied regarding the stereocomplexation in non-deuterated solvents. ° Kramer et reported about SEC-NMR for the chemical composition analysis of poly... 

Ghassemieli, E. and Nassehi, V., 2001a. Stiffness analysis of polymeric composites using the finite element method. Adv. Poly. Tech. 20, 42-57. 

Chain Structure. The chemical composition of poly (vinyhdene chloride) has been confirmed by various techniques, including elemental analysis, x-ray diffraction analysis, degradation studies, and in, Raman, and nmr spectroscopy. The polymer chain is made up of vinyhdene chloride units added head-to-tail ... 

Various techniques have been used for the determination of oligomers, including GC [135], HPLC [136-138], TLC for polystyrene and poly a-methyl-styrene [139] and SEC for polyesters [140,141]. GC and PyGC-MS can also profitably be used for the analysis of the compositions of volatile products formed using different flame retardants (FRs). Takeda [142] reported that volumes and compositions of the volatile products and morphology of the char were affected by FRs, polymers (PC, PPE, PBT) and their reactions from 300... 

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