New PDF release: Plastics testing and characterization : industrial

By Alberto Naranjo Carvajal, Technologe.; Alberto Naranjo C, Technologue.; et al

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Values and Units Number of vinylidene unsaturations per 1000 carbon atoms. 15: Standard determination of the vinyl acetate content of ethylene-vinyl acetate (EVA) copolymers by Fourier transform infrared spectroscopy (FT-IR) Standard ASTM 5594 -94 Scope This test method determines vinyl acetate content of EVA copolymers using pressed films (Procedure A) or molded plaques (Procedure B) and internal corrections for sample thickness. 5 to 29% vinyl acetate. Specimen Pressed polymer film. polyester sheets Apparatus Fourier transform infrared (FT-IR) spectrophotometer, a hot plate (Procedure A only, a microscope slides (procedure A only), a laboratory press, backing plates, a brass shim stock (Roll), a polyester sheet, and a metal template.

An extract rich in plasticizers was studied by gas chromatography combined with mass selective detector, and the presence of (DOP) plasticizer was confirmed. 5 Determining filler type in a polypropylene resin Polypropylene pellets were analyzed to determine the filler type. The filler content was determined by carrying out a TGA study of the polypropylene resin, and the type of filler was determined by a FTIR of the final ash obtained in the TGA. The sample preparation was done by pressing a KBr pellet with the ash obtained after the TGA analysis.

Here, the Raman spectrum was measured through a 1-inch quartz window, while the inside of the reactor was pressurized to 1000 and 2000 psi. 25 compares the degree of cure at 1000 and 2000 psi to the cure at atmospheric pressure. 26 [12] provides an image of a small area of the full spectrum that was used for the curing analysis of unsaturated polyester resin and notes the peaks of interest. 26: Spectrum interest area for UPE resin during cure. 3 Energy Dispersive X-Ray Spectroscopy 51 The peak at a frequency of 1632 cm -1 results from the vinyl stretching for the styrene C=C bond that is being consumed during the crosslinking reaction.

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