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Physicochemical properties of PET resins - Polisan Hellas
air. It is not formed in any other processing (e.g. stretch blow molding). The AA concentration measured in the resin or the preform is the sum of the residual AA and the released AA under the analysis conditions applied to the sample (e.g. 60 min at 150 degC).By applying different time and temperature conditions, different values may be obtained.
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Physicochemical properties of PET resins - …
www.polisanhellas.comFigure 1. 3. Acetaldehyde Acetaldehyde (AA) is formed by the thermal degradation of PET at the high temperatures that polymer experiences during melt process.
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