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NTIS 바로가기Composites research = 복합재료, v.32 no.6, 2019년, pp.342 - 348
김종호 (Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology) , 구본철 (Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology)
Development of flame retarding polymer based materials has been studied actively due to the increase in use of polymers. The post treatment of manufactured fibers or the introduction of flame retardant into fibers is representative method for the way to improve the flame retardancy. Among the polyme...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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난연섬유는 무엇인가? | 난연섬유는 한계산소지수(limiting oxygen index, LOI) 값이 28 이상인 것으로 불꽃의 접촉에 의해 연소가 되지만, 불꽃의 제거 이후 연소가 더 이상 진행되지 않도록 스스로 방지 또는 억제하는 섬유를 말한다. 이는 섬유 자체가 연소가 되지 않는 것이 아니라 연소의 불꽃의 전이가 진행되지 않아 화재가 더 이상 커지지 않도록 연소 능력을 상실하게 되는 섬유이다. | |
고분자 재료의 난연화에 대한 연구가 시급한 이유는 무엇인가? | 그래서 화재에 상대적으로 많이 취약한 고분자 재료의 난연성을 향상시키기 위해 첨가제인 난연제의 개발을 비롯하여 고분자 재료의 표면 화학 처리에 이르기까지 다양한 연구가 활발히 진행되고 있다[6-9]. 특히 고분자 재료의 연소과정에서 유독가스가 발생하기 때문에 고분자 재료의 난연화에 대한 연구는 더욱 시급한 상황이다 [10-15]. | |
PAN의 어떠한 특징에 의해서 불꽃의 전파가 방지가 되는가? | 탄소섬유 전구체인 PAN 섬유는 안정화(stabilization), 탄화(carbonization), 흑연화 (graphitization) 공정을 거친다. 이 일련의 과정들 중 안정화 과정에서 PAN 섬유는 분자내 또는 분자간 가교 결합이 발생하여 고온에서 쉽게 용융되지 않는 특성이 나타났다[16-21]. 이는 화재 발생시 용융된 고분자 재료가 흘러내려 불꽃의 전파가 방지될 수 있는 장점을 지닌다[22]. |
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