Study on the Effect of Iron-based Metal Catalysts on the Thermal Decomposition Behavior of ABS

Iron계 금속 촉매가 ABS의 열분해 거동에 미치는 영향에 관한 연구

The thermal degradation of ABS in the presence of iron-based metal catalysts has been studied by thermogravimetric analysis (TGA). The reaction of iron-based metal catalysts (ferric nitrate nonahydrate, ammonium ferric sulfate dodecahydrate, iron sulfate hydrate, ammonium ferric oxalate, iron(II) acetate, iron(II) acetylacetonate and ferric chloride) with ABS has been found to occur during the thermal degradation of ABS. In a nitrogen atmosphere, char formation was observed, and at $600^{\circ}C$ approximately 3~23 wt% of the reaction product was non-volatile char. The resulting enhancement of char formation in a nitrogen atmosphere has been primarily due to the catalytic crosslinking effect of iron-based metal catalysts. On the other hand, char formation of ABS in air at high temperature by iron-based metal catalyst was unsuccessful due to the oxidative degradation of the char.

Iron계 금속 촉매의 존재 하에서 ABS의 열분해 거동을 TGA (Thermogravimetric Analysis)를 통해서 조사하였다. Iron계 금속 촉매(ferric nitrate nonahydrate, ammonium ferric sulfate dodecahydrate, iron sulfate hydrate, ammonium ferric oxalate, iron(II) acetate, iron(II) acetylacetonate 및 ferric chloride)는 ABS의 열분해 과정에서 화학반응을 야기하여, 질소분위기에서 촤(char)형성이 관찰되었으며, $600^{\circ}C$에서 3~23 wt%의 비휘발성 촤를 형성하였다. 이와 같은 질소분위기에서의 ABS의 촤 생성은 iron계 금속 촉매의 가교효과(crosslinking effect)로 추정된다. 한편, 공기분위기에서는 생성된 촤가 고온 산화반응에 의해서 열분해되었다.