방사선 가교 기술로 제조된 polyolefin/metal hydroxide 복합재료의 고온 열화 특성 및 난연성
High Thermal Degradation and Flame Retardancy of Polyolefin/Metal Hydroxide Composite Prepared by Radiation Crosslinking Technology
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초록
Polyolefins (PO) are used in various industrial fields due to their excellent mechanical properties,processability, and chemical resistance. However, they have low flame retardancy, and when exposed to hightemperatures, there are problem that mechanical properties deteriorate due to oxidation. In this study, we developedPO/metal hydroxide composites that exhibit excellent mechanical strength, heat resistance, and flame retardancyby using antioxidants and radiation crosslinking technology. To improve mechanical strength, heat resistance,and flame retardancy, PO/metal hydroxide/antioxidant composites were prepared and irradiated with an electronbeam. Specifically, at temperatures above 200oC, the PO/metal hydroxide composites with primary and secondaryantioxidants added and irradiated with a 100 kGy electron beam exhibited excellent thermal stability with a thermalshrinkage rate of less than 3%. In addition, the flame retardancy of the PO/metal hydroxide/antioxidant compositeswas improved due to enhanced thermal stability from electron beam irradiation and reduced thermal decompositionrate from the antioxidants. These results indicate that radiation crosslinking and antioxidants are effective method tosimultaneously achieve mechanical properties, heat resistance, and flame retardancy.
Abstract
Polyolefins (PO) are used in various industrial fields due to their excellent mechanical properties,processability, and chemical resistance. However, they have low flame retardancy, and when exposed to hightemperatures, there are problem that mechanical properties deteriorate due to oxidation. In this study, we developedPO/metal hydroxide composites that exhibit excellent mechanical strength, heat resistance, and flame retardancyby using antioxidants and radiation crosslinking technology. To improve mechanical strength, heat resistance,and flame retardancy, PO/metal hydroxide/antioxidant composites were prepared and irradiated with an electronbeam. Specifically, at temperatures above 200oC, the PO/metal hydroxide composites with primary and secondaryantioxidants added and irradiated with a 100 kGy electron beam exhibited excellent thermal stability with a thermalshrinkage rate of less than 3%. In addition, the flame retardancy of the PO/metal hydroxide/antioxidant compositeswas improved due to enhanced thermal stability from electron beam irradiation and reduced thermal decompositionrate from the antioxidants. These results indicate that radiation crosslinking and antioxidants are effective method tosimultaneously achieve mechanical properties, heat resistance, and flame retardancy.
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