Direct Determination of Inhibitors in Polymers by Luminescence Techniques.

Fluorometric Analysis

“…Luminescence studies have been reported on bitumens (95,151,424) humic and fulvic acids (380) and soils (44), malvin in wines (126), naphthenic acids in undergound water (76), aromatics in motor fuels (251), and organic insulating liquids (110). Inhibitors in polymers (120) and in free-radical reactions (205) have been determined by luminescence techniques.…”

Rubber

“…Fluorescence and phosphorescence were used to determine 0.01 % AT-phenyl-2-naphthylamine; poly(2,2,4 -trimethyl -1,2 -dihydroquinoline); and 2,2'-dimethyl-5,o'-di-fbutyl -4,4' -dihydroxydisulfide in cements containing 5% polymer (41). This method is also applicable to thin films.…”

Extraction of polypropylene additives and their analysis by HPLC

“…Additives belong to several categories such as heat stabilizers, sterically hindered phenolic antioxidants, hindered amine light stabilizers, antiacids, antistatic agents and lubricant agents. Direct methods of analysis such as ultraviolet absorption, infrared spectroscopy, fluorescence, phosphorescence and X-ray fluorescence have been reported [3][4][5]. The extraction and analysis of additives are difficult due to the following reasons: the low concentration at which they are present in the polymer; a relatively insoluble matrix; the thermolability and reactivity of the additives which have a wide range of molecular weight and polarity.…”