| 초록 |
The preservation of physical properties andaesthetics are two important aspects of the film industry. For most applications, a combination of a phenolic antioxidant and a phosphite melt processing stabilizer can provide the base stabilization that is necessary to provide the retention of physical properties, goodprocessability, long term thermal stability without compromising the overall aesthetic appearance of the film product. However, in selected end-use applications, it is very desirable to have film products that do not discolor during initial processing or while the product is kept in storage. Under a selectedset of circumstances, certain types of phenolics have been shown to be susceptible to discoloration, either due to inadequate stabilizer concentrations, harsh processing conditions, ionizing radiation, prolonged storage of the films in an environment containing oxides of nitrogen (pollution), or a combination of these factors. Approaches to eliminate discoloration of APAO/phenolic antioxidant system |
