Analysis of Plastics by M.J. Forrest

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By M.J. Forrest

This overview outlines every one procedure utilized in plastics research after which illustrates which equipment are utilized to acquire a specific end result or piece of compositional info. for instance, polymer and filler identity, molecular weight selection, antidegradant quantification and floor research examine equipment are all incorporated. round four hundred abstracts from the Rapra Polymer Library database accompany this evaluation, to facilitate extra examining.

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2 Fibrous Fillers In certain applications it is necessary to impart the strength required to a plastic part by the use of a fibrous fillers. , nylon) (4) Wood flour 20 It is usually obvious whether a plastic contains a fibrous filler from either a visual inspection or the use of a relatively low powered optical microscope. Glass fibres can be isolated and gravimetrically determined by ashing at 600 °C in a muffle furnace. Higher temperatures (above 700 °C) can cause problems as the glass will eventually reach its melting point.

8 w/v level of virgin polystyrene and known amounts of Uvitex OB are used as calibrants. , benzophenone and salicylic acid types in polyethylenes) and HPLC. This latter method has been used extensively for the determination of antioxidants but has not received as much attention in the literature for UV stabilisers. , 10% or greater) to products such as window frames. The amount of titanium dioxide in a plastic can be determined after acid digestion of the matrix by the use of an elemental technique such as AAS/ICP.

Slip additives and antistats) onto the surface of plastics. It is often the case that complementary surface analysis techniques such as SIMS and XPS can be used together in order to successfully solve a failure or characterisation problem. In such cases, XPS would be used to generate quantitative information, whilst SIMS would provide qualitative clues with respect to the chemistry. , it could be silica, silicate or silicone. Analysis of the same surface by static SIMS enables the mass spectrum of the sputtered top layer fragments to be determined and the presence of m/e ions at 43, 73 and 147 confirm that a polydimethyl siloxane is present.

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