http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 박재우 ( Hyun Jun Kim (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Crosslinked IIR 의 블렌드비에 따른 EPDM 의 내기체투과특성 향상
김현준,정일현,홍인권,박재우 ( Hyun Jun Kim,Il Hyun Jung,In Kwon Hong,Jae Woo Park ) 한국고무학회 1998 엘라스토머 및 콤포지트 Vol.33 No.3
N/A It is well known that EPDM(ethylene propylene clime monomer) rubber has inherently excellent resistance to the weathering, ozone, heat, cold rind moisture, whereas crosslinked IIR(isobutylene isoprene divinyl benzene terpolymer) shows proper resistance to the water and gas permeation. Various characteristics of EPDM bend with crosslinked IIR such as curing characteristics, mechanical properties, dispersion of minor component and gas impermeability were explored. The optimum curing tine(t_(90)) examined with peroxide was decreased by adding small amount of crosslinked IIR to the EPDM rubber. Mechanical properties of blends such as tensile strength, hardness and elongation at break were enhanced by increasing EPDM content.. These results might be explained with the affinity of carbon black to the EPDM rubber. On the other hand, the physical properties were not changed significantly after aging, and the increase of crosslinked IIR fraction caused the decrease of compression set to small rate. EPDM rubber shows different behavior with crosslinked IIR in oxygen permeability. By adding 30wt.% crosslinked IIR to the EPDM rubber, the resistance to the oxygen permeation was improved up to three times than that of pure EPDM rubber. Conclusively, EPDM blend containing 30wt.% crosslinked IIR might be commercially applied to the o-ring and electric parts because of its proper resistance to the weathering, ozone and oxygen permeability.
-
황오현,김준식,박재우,박성근,김영환,송해룡 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.5
The principal advantages of the distraction lengthening method are its relative simplicity, no vascular reconstruction is required, the lengthened digital structure retains its original sensibility and vascular supply, and daily distraction of lmm or more usually is tolerated well. Lengthening is achieved by gradual distraction after osteotomy or articular detachment of rudimentary metacarpal bones. The authors analyzed the results and complications of lenghtening of short tubular bone of hand in four patients(11 cases) who were treated with external fixator since November 1991. The age of the patients was between 18 and 44 years old with a mean age of 25.5 years. In four patients, the causes of shortening were all traumatic amputation, In 11 cases of lengthening, we performed the lengthening in proximal phalanges of hand(10 cases), metacarpus(1 case). The healing indexes were ranged from 56 days/cm to 96 days/cm with mean 90 days/cm. There were 4 complications including axial deviation(2 cases), premature consolidation(1 case), pin tract infection(1 case). Bilateral external fixator or ring external fixator with hinge system are necessary for prevention of axial deviation and adjacent joint contracture developed during lengthening.
ScienceON
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
