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다단계 유화중합을 이용한 마이크론 크기의 PMMA/PDVB 및 PS/PDVB 단분산 입자의 제조
최봉철 ( Bong Cheol Choi ),엄기범 ( Ki Beom Um ),변자훈 ( Ja Hoon Byun ),박홍수 ( Hong Soo Park ),우종표 ( Jong Pyo Wu ),백운필 ( Woon Phil Baik ) 한국유화학회 2004 한국응용과학기술학회지 Vol.21 No.4
N/A Highly crosslinked micron-size monodispersed PMMA/PDVB and PS/PDVB particles were prepared using seeded multi-stage emulsion polymerization. PMMA and PS seed particles were synthesized by seeded multi-stage emulsion polymerization and soap-free emulsion polymerization. Then PMMA/PDVB and PS/PDVB particles were obtained using semi-batch type emulsion polymerized using divinyl benzene as a cross-linkable monomer in the presence of seed particles. PMMA particles with size of ai. 730 ㎚ and polydispersity of 1.03 were successfully prepared in this experiment. PS particles with size of ca. 1.5 ㎛ and polydispersity of 1.01 were prepared in this experiment. Highly crosslinked PS/PDVB particles with size of ca 1.3 ㎛ and polydispersity of 1.00 were obtained.
알루미늄 합금재 Frame을 이용한 벽체거푸집공법의 측압저항성능에 관한 실험적 연구
안진봉,최봉철,안재철,강병희 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
This study is for the investigation of form using the aluminum-compound metal frame which is improved in the capacity in the wall-concrete structure in stead of using the existing form which has problems such as, excessive exposure cement, the loss of labor when it is constructed or disjointed, etc. It has passed the KS F 8006 test and the the result of field test, the displacement of the form with aluminum-compound metal frame was satisfied with Specification. Therefore, it is estimated that the form with aluminum-compound metal frame could present its good quality when it is applied to the construction.