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표면 활성화된 폐 EPDM 분말의 물성과 냄새 성분 분석 연구
최종만 ( J. Choi ),김섭 ( S. Kim ),정경호 ( K. Chung ),정진수 ( J. Chung ),유태욱 ( T. Yoo ),양준호 ( J. Yang ) 한국고무학회 2007 엘라스토머 및 콤포지트 Vol.42 No.4
본 연구에서는 웨더스트립 공정스크랩인 폐 EPDM을 재활용하기 위해 고온전단분쇄기를 이용하여 표면활성화 된 EPDM 분말을 제조하여 이의 물성과 냄새성분분석에 관한 연구를 수행하였다. 본 연구에서 사용되어진 폐 EPDM은 solid, sponge, solid+sponge, solid+metal형으로서 입도분석과 SEM을 통해 입자크기와 입도 분포도를 조사하였고, 가교제를 첨가하여 활성화 된 분말표면의 재가교 여부를 조사하였다. Solid형의 경우 가장 좁은 입도 분포도와 작은 입자크기, 상대적으로 높은 인장 물성을 나타내었다. 화학적 표면 탈황을 유도하기 위해 표면 활성화제를 첨가한 결과 표면활성화제의 첨가량이 증가할수록 효율적인 탈황이 유도되었다. TPE제조를 위해 폴리올레핀과의 블렌드 시 활성화된 EPDM 분말의 동적가황 가능성을 확인하기 위하여 가교제를 첨가하여 반응을 진행한 결과 황을 첨가할 경우 가교반응이 진행되지 않았고, DCP(dicumyl peroxide)의 경우 6 phr이 첨가되었을 때 효율적인 표면 가교반응 및 최적의 인장 물성을 나타내었다. 화학적 표면 활성화를 유도한 폐 EPDM 분말의 경우 표면활성화제의 첨가로 인해 냄새가 발생되는데, 이를 제거하기 위하여 수분흡착 공정과 rose oil 첨가 공정을 진행하였으며 GC/MS를 통해 냄새 성분을 분석하였다. In this study, the EPDM powder which was surface activated by high temperature and shear pulverization process was prepared and the mechanical properties and odor material analysis were investigated. Analysis for particle size and size distribution of waste of the EPDM powder has been performed. The waste EPDMs used in this study were 4 types of solid, sponge, solid+sponge, and solid+metal. According to the results, the solid type showed the smallest particle size among the 4 types of EPDM powder. Effective surface devulcanization of EPDM powder could be obtained by the addition of the reclaiming agent. The dicumyl peroxide was considered as the best crosslink agent for dynamic vulcanization when the surface activated EPDM powder was blended with polyolefin in order to make TPE. Also, the optimum amounts of DCP was 6 phr in terms of surface crosslink reaction and mechanical properties of EPDM powder. The processes of water adsorption and rose oil addition were employed to remove the odor of EPDM powder caused by reclaiming agent. The GC/MS was used to analyze the odor compounds.
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서양건축에 있어서 건축물의 유형으로서 박물관의 의미에 관한 연구I
朴秀鎭,鄭鎭洙 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1
The social settings in an age were closely concerned with the development of certain types of buildings. The museum as a building type is so significant that it refers not only to its specific function but also to an attitude to the cultural heritage, and to a direct material expression. The real meaning of museum was became established in the 18th century under the influence of Enlightenment and Revolution and museums became public institutions in the age of reason. In the 19th century, museum, as well as other cultural facilities such as libraries and theatres, were built throughout many European cities. The museum was one of important urban artefacts and a significant element in a city with cultural attractions. Museum had grown from an ancient idea and the prototype can be read and seen in the ancient temples and in Alexandria. In the monasteries and palazzos a great many of collections of arts were preserved and remained as part of buildings. The great Baroque palaces were themselves museums. In the modern world, museum are centers for research and education in addition to the conventional function of collection. They are cultural attractions and places for the public enjoyment. The buildings and their a great many of collections in museums are literally part of history and culture. The meaning of museum is that the building type has been one of significant social expressions of an age. In this study, socio-cultural environments and ideas of the building typology in history are classified into several cultural frameworks and their historical values and design processes are discussed.
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