Abstract |
자동차 Oil cooler용 호스를 구성하는 클로로폴리에틸렌(CPE) 고무재료의 내열 및 난연성을 향상시키기 위하여 수산화알루미늄을 내열 및 난연제로 제조한 배합고무의 가황틀성, 물리적 성질, 내열성, 난연성을 조사하였으며, 실험결과로부터 고무와 난연제의 최적배합조건을 도출하였다. 고무시편을 제조하는데 사용된 고무재료는 화학적 내식성과 내한성이 우수하면서도 가격이 저렴한 클로로폴리에틸렌 고무를 사용하였으며, 내열 및 난연제로서는 알루미늄 표면 처리과정에서 발생되는 에칭부산물을 분쇄와 정제를 거쳐 가공한 수산화알루미늄을 사용하였고, 분말은 XRD(X-ray diffraction), PSA(Particle Size Analysis), SEM(Scanning Electron Microscopy) 및 ICP-AES(Inductively Coupled Plasma-Atomic Emission Spectroscopy)로 입자의 상, 크기, 분포, 형태 및 성분을 분석한 후 CPE 고무재료와 0∼80 phr범위에서 훈련하였다. CPE배합 고무의 경도, 인장강도, 신장율, 인장응력 및 열적특성을 분석한 결과, 고무재료규격을 초과하지 않는 범위 내에서 최대의 내열 및 난연효과를 주는 수산화알루미늄의 첨가량은 40 phr로 나타났으며, 이 배합비에서 클로로폴리에틸렌의 난연성은 3배 향상되었다. Aluminum Hydroxide was employed as a thermal retardent and flame retardent for Chloropolyethylene (CPE) rubbery materials which is the construction material of automotive oil cooler hose. and then cure characteristics, physical properties, thermal resistance and flame retardation of compounded rubber were investigated, and optimum mixing conditions of rubber and flame retarding agent were deduced from the experimental results. CPE rubber material which has excellent properties of chemical corrosion resistance and cold resistance and inexpensive in price was used to prepare rubber specimen. The by-product of ething, produced from the process of surface treatment of aluminum was processed to aluminum hydroxide via crushing and purification, which is characterized by XRD, PSA, SEM and ICP-AES techniques in terms of phase, size, distribution, morphology and components of particles and then mixed to CPE rubber materials in the range of 0~80 phr. Hardness, tensile strength, elongation and thermal properties of compounded rubber specimens were tested. The optimum mixing ratio of rubber to additives to give maximum effect on thermal resistance and flame retardation, within the range of tolerable specification for rubber materials, was determined to be 40 phr. The flame retardation of CPE rubber materials was found to be increased by 5 times at this mixing ratio. |
