SummaryHigh speed hydrothermal decomposition of some chemically inert condensation polymers in alkaline solutions under near-critical pressures and temperatures has been investigated by on-line Cu-
SummaryThe determination of nanometer thick layers of poly(methy1 methacrylate) coated on to the surface of poly(ethy1ene terephthalate) film has been investigated by high resolution pyrolysis gas chromatography without sample pretreatment or modification of the instrumentation used. A good linear relationship was observed between the quantity of the characteristic pyrolysate and the thickness of the poly(methy1 methacrylate) layer; the detection limit was sufficient to enable the quantitation of poly(methy1 methacrylate)-to-poly(ethy1ene terephthalate) film thickness ratios of 1 :20000 in composite materials.
A Curie-point heating technique has already been introduced to pyrolysis-gas chromatography, which was developed by us. We analyzed the component of a multi-component polyester completely by using a combination of the technique and preparative HPLC. We used Curie-point pyrolysis-GC/ MS, direct injection/ MS, headspace-GC/ MS and preparative HPLC for this study. We could thus determine the composition of the uncured polyester for manufacturing man-made marble consisting of an uncured polyester prepolymer, a crosslinking accelerator, an acrylate copolymer as the modification agent and some additives (surfactant and plasticizes). This analytical method is an available, convenient way for compositional analysis of complex polymers materials.
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