Studying the myriad effects of plastics is made difficult in part by the panoply of additives
- fillers, (wood and rock flour, clay, kaolin, graphite, glass fibers, cotton flakes, jute or linen, cellulose pulp)
-strengtheners (clays, silica, glass, chalk, talc, asbestos, alumina, rutile, carbon black, and carbon nanotubes)
-plasticizers, (organic or inorganic cadmium, barium, or lead salts)
-pigments (azo pigments, phthalocyanine pigments, anthraquinone chromophores)
antioxidants,
-UV stabilizers, (phenols and aromatic amines)
-lubricants, (calcium or magnesium stearates)
-and flame-retardants (chlorine and bromine, which release by the action of the flame; phosphorus, which favours the transformation into coal; and aluminium hydroxide)
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