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 : ( Hyoungsan Kye ) (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
-
PVC 스크랩의 재활용 촉진을 위한 기계적 물성에 관한 연구
계형산,이용무,한재명,홍석원,김영수,이동현,배종욱,Kye, Hyoungsan,Lee, Yong Moo,Han, Jaemyung,Hong, Suk won,Kim, Yungsoo,Lee, Dong hyun,Bae, Jong wook 한국자원리싸이클링학회 2015 資源 리싸이클링 Vol.24 No.6
There are few studies on the effects of different sources of PVC scraps generated after the end-of-life PVC products and these scraps are used to prepare PVC products of low quality. In this paper, rigid PVC scraps from different sources such as clothes, pipes, and others were investigated to incorporate into virgin PVC compounds as a part of efforts to recycle various PVC scraps effectively. It was found that the tensile strength and impact strength of the PVC compounds generally decreased with increasing the content of PVC scraps. The impact properties of scrap were in order of CC > PC > RC, tensile strength were PC > CC > RC and Vicat softening temperature shows no specific tendency. CC scraps contents of 50 phr of virgin PVC resin showed 80 %, and PC scrap with 50 phr of virgin resin showed 50% of the mechanical properties with virgin PVC. 수명이 다하거나 용도 폐기에 의해 버려지는 PVC 스크랩은 분쇄 후 저급 제품으로 재생산되는 경우가 대부분이고 발생 원인별 물성에 관한 연구가 적은 현실이다. 본 연구에서는 의복용, 파이프 및 이음관류, 프로파일, 다양한 경질 PVC 등 수명이 다하여 발생되는 폐 PVC 스크랩을 신재 수지에 투입하되 투입되는 스크랩 함량의 변화에 따른 물성을 관찰하였다. PVC 스크랩의 기계적 물성은 스크랩의 함량이 증가함에 따라 인장강도 및 충격강도가 모두 낮아지는 결과를 나타났다. 충격강도는 Cloth insert scrap (CC) > PC (Pipe scrap) > RC (Rigid scrap), 인장강도는 PC > CC > RC, Vicat 연화온도는 경향성이 없음을 나타냈으며, CC 소재는 스크랩 함량이 50 phr일 때 신재 PVC 기계적 물성의 80 %에 이르는 물성을 나타내었고, PC 소재는 스크랩 함량이 50 phr일 때 신재 PVC 인장강도의 50 % 수준임을 알 수 있었다.
-
Electrical Properties of CNT and Carbon Fiber Filled Hybrid Composites Based on PA66
( Minji Lee ),( Se-ho Park ),( Kwang-hwan Jhee ),( Hyoungsan Kye ),( Daesuk Bang ) 한국고무학회 2021 엘라스토머 및 콤포지트 Vol.56 No.2
In recent times, the demand for electronic devices has increased because of advancements in the electronics industry. Consequently, research on shielding against electromagnetic interference (EMI) from electronic devices has also progressed significantly. In particular, research on imparting electrical conductivity to plastic has seen substantial progress. In this study, the effect of hybrid fillers comprising carbon fiber (CF) and carbon nanotubes (CNTs) on the electrical properties of polyamide 66 (PA66) composites was investigated. PA66 composites were prepared using a BUSS Co-Kneader single-screw extruder. EMI shielding effectiveness (SE) increased with the increasing addition of unsized CF (UCF), sized CF (SCF), and CNTs. For the PA66/SCF/CNT hybrid filler composites, EMI SE significantly increased with the increase in SCF content. Finally, the hybrid filler comprising SCF and CNTs may have a synergistic effect on the EMI SE and surface resistivity of PA66/SCF/CNT composites.
-
Mechanical Properties and Thermal Stability of Waste PVC/HDPE Blend Prepared by Twin-screw Extruder
( Rami Lee ),( Se-ho Park ),( Jong-sung Baek ),( Hyoungsan Kye ),( Kwang-hwan Jhee ),( Daesuk Bang ) 한국고무학회 2019 엘라스토머 및 콤포지트 Vol.54 No.1
Recycling of waste polyvinyl chloride plastics has attracted much attention due to environmental problems, but the poor mechanical properties, low thermal stability, frequent breakage of strands, and melt cracking of the waste plastics have limited their widespread use. To overcome these disadvantages of waste PVC (W-PVC), recycled PVC powder blend was prepared by adding high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) as a heat stabilizer and compatibilizer, respectively. An intermeshing co-rotating twin screw extruder was used to prepare the blend, and the characteristics of the blend were analyzed by SEM and TGA, and by using a UTM and Izod impact tester. The impact strength was improved as the EVA content increased for the W-PVC/HDPE (80/20 wt%) blend. As the HDPE and EVA contents increased in the W-PVC/HDPE/EVA blend, the impact strength increased. SEM observations also revealed the improved interfacial adhesion for the EVA-containing blend.
-
Koo, Hyun Mo,Ahn, Chang-Il,Lee, Dong Hyun,Roh, Hyun-Seog,Shin, Chae-Ho,Kye, Hyoungsan,Bae, Jong Wook Elsevier 2018 Fuel Vol.225 No.-
<P><B>Abstract</B></P> <P>A crucial contribution of Al<SUB>2</SUB>O<SUB>3</SUB> pillar for an enhanced structural stability of a highly ordered mesoporous Co<SUB>3</SUB>O<SUB>4</SUB> (Al/m-Co) for CO hydrogenation activity was verified in terms of newly formed stable phases with their interactions. At an optimal 5 wt%Al<SUB>2</SUB>O<SUB>3</SUB> on the Al/m-Co, the activity and stability of Fischer-Trospch synthesis (FTS) reaction were largely enhanced by preserving the highly ordered original mesoporous Co<SUB>3</SUB>O<SUB>4</SUB> structures due to the newly formed strong Al<SUB>2</SUB>O<SUB>3</SUB>-Co<SUB>3</SUB>O<SUB>4</SUB> interactions with the partial formation of the catalytically inactive spinel-type CoAl<SUB>2</SUB>O<SUB>4</SUB> phases in the matrices of the mesoporous Al/m-Co. The main roles of the Al<SUB>2</SUB>O<SUB>3</SUB> pillar on the Al/m-Co were a structural promoter to maintain the highly ordered mesoporous Co<SUB>3</SUB>O<SUB>4</SUB> structures by easily removing the heavy hydrocarbons formed during FTS reaction without significant coke depositions through those large mesopores. The homogeneously distributed Al<SUB>2</SUB>O<SUB>3</SUB> pillaring material less than monolayer on the Al/m-Co surfaces played a crucial role to preserve the original ordered mesoporous Co<SUB>3</SUB>O<SUB>4</SUB> structures through the partial formation of outer surface CoAl<SUB>2</SUB>O<SUB>4</SUB> phases with less blockages of active metallic cobalt sites by heavy coke precursors formed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Al<SUB>2</SUB>O<SUB>3</SUB> pillared ordered-mesoporous Co<SUB>3</SUB>O<SUB>4</SUB> (Al/m-Co) showed a superior FTS activity and stability. </LI> <LI> Enhanced structural stability of Al/m-Co was from the partially formed thermally stable CoAl<SUB>2</SUB>O<SUB>4</SUB>. </LI> <LI> Main role of Al<SUB>2</SUB>O<SUB>3</SUB> pillar was the structural promoter to maintain the ordered Co<SUB>3</SUB>O<SUB>4</SUB> structures. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
A Study on the Mechanical and Thermal Properties of Polyketone/Chopped Carbon Fiber Composites
( Seonggil Kim ),( Ho-bin Jeong ),( Hyeong-su Lee ),( Yu-ri Park ),( Rami Lee ),( Hyoungsan Kye ),( Kwang-hwan Jhee ),( Daesuk Bang ) 한국고무학회 2019 엘라스토머 및 콤포지트 Vol.54 No.4
In this study, aliphatic polyketone (PK)/chopped carbon fiber (CCF) composites with various CCF contents were prepared using a modular intermeshing co-rotating twin screw extruder, and their mechanical and thermal properties such as tensile, flexural, and impact strength and thermal conductivity were investigated. The amount of CCF was increased from 0 to 50 wt%. The tensile and flexural strength of the PK/CCF composites increased as the CCF content increased, but the elongation at break and impact strength was lower than that of pure PK. Thermal properties such as heat distortion temperature and thermal conductivity increased as the CCF content increased. Morphological observations revealed that fiber orientation and interface adhesion between the PK and the CCF in the PK/CCF composites were formed due to the twin screw extrusion, which contributed to improving the mechanical and thermal properties of the composites.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
