Analysis of Plastics by M.J. Forrest

By M.J. Forrest

This overview outlines every one approach utilized in plastics research after which illustrates which tools are utilized to procure a specific consequence or piece of compositional details. for instance, polymer and filler identity, molecular weight choice, antidegradant quantification and floor research learn tools are all incorporated. round four hundred abstracts from the Rapra Polymer Library database accompany this evaluate, to facilitate additional studying.

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This is particular true of the automotive industry. Contamination can enter the product stream either in the ingredients used in the production, or during the There are a number of specific tests that automotive companies insist that plastics components manufactured 37 Analysis of Plastics by suppliers have to pass. An example of such a test is the VW emissions test which involves placing the component in a cell of given dimensions and heating the cell for a given time and a specified temperature.

A number of methods use the UV absorbing properties of the UV stabiliser. 02% w/w by using an extraction with chloroform under reflux followed by analysis of the extract using a UV/Vis spectrometer. The ultraviolet absorption peak at 355 nm is used and a calibration curve produced by dissolving known amounts of Tinuvin 326 in chloroform. Another technique uses the fluorescence of these compounds. 8% w/v of polymer) of polystyrene by excitation at 370 nm and recording the fluorescence at 435 nm.

1 mg), and if a mixture of chemicals is suspected, a bulk composition by TGA can be obtained. If identification problems are still occurring, more sophisticated techniques such as GC-MS, SIMS and LIMA can be employed. Where the contamination is in a liquid form, a similar analytical regime can be used. A number of plastic products can suffer from solid inclusions, but it is probably most common in extruded products such as car door seals. It is also possible to use a Raman microscope system for the analysis of contaminants in plastic materials (293).

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