By M.J. Forrest
This overview outlines each one strategy utilized in plastics research after which illustrates which equipment are utilized to acquire a selected end result or piece of compositional details. for instance, polymer and filler id, molecular weight selection, antidegradant quantification and floor research examine tools are all incorporated. round four hundred abstracts from the Rapra Polymer Library database accompany this evaluation, to facilitate additional studying.
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Additional resources for Analysis of Plastics, Vol. 13 (2002)(en)(160s)
Such process aids include ABS, chlorinated polyethylene, MBS, EVAPVC graft polymers and acrylate-methacrylate copolymers. As these are usually found in unplasticised PVC, direct analysis of the product by IR will usually indicate the presence of those that have a distinctive spectrum as no masking by plasticiser will take place. However, even rigid PVC can contain a small amount of phthalate and so it is advisable to carry out a solvent extraction to clean up the matrix first. , chlorinated polyethylene) has a relatively bland spectrum, a technique such as NMR will be required to both detect and quantify it.
1 Process Aids and Lubricants In PVC technology certain polymeric additives can be considered as process aids. These polymers have a similar composition to those used as impact modifiers in PVC formulations but are more compatible and so are primarily included to ensure more uniform flow and hence improve surface finish. Such process aids include ABS, chlorinated polyethylene, MBS, EVAPVC graft polymers and acrylate-methacrylate copolymers. As these are usually found in unplasticised PVC, direct analysis of the product by IR will usually indicate the presence of those that have a distinctive spectrum as no masking by plasticiser will take place.
The sectioning is often undertaken obliquely in order to maximise the apparent layer thickness. The microscope also allows the thickness of each layer to be determined. It is also possible to use an ATR technique to record infrared spectra of the outside layers and reserve the IR microscope for the central layers. This is possible because the ATR technique only penetrates a few microns into the surface of the layers. , germanium, Analysis of Plastics zinc selenide, etc) to control the depth of penetration.
Analysis of Plastics, Vol. 13 (2002)(en)(160s) by M.J. Forrest