• Title, Summary, Keyword: 충진재

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Comparison of Performance & Jet Fuel Oil Resistance of Joint Sealant Materials for Airside (공항용 조인트 충진재의 성능 및 내유저항특성 비교연구)

  • Park, Tae Soon;Lee, Keun Sik;Lee, Su Hui
    • Journal of The Korean Society of Civil Engineers
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    • v.26 no.4D
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    • pp.587-592
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    • 2006
  • The joint sealants used in the airside should resist the high temperature of the jet blast and the jet fuel oil spilled when the aircraft is maintained and filled. The material of joint sealant for the airside should be different from that for the road due to these characteristics. Three different kinds of the joint sealant materials were tested in this paper. The materials include the polysulfide, the polyurethane and the silicon. The test results show that the physical properties and the performance of the polysulfide show the high resistance to the jet blast and the jet fuel oil. When the characteristics of the airside considered, the polysulfide may apply in the both of the runway and the apron area, the polyuretane can be applied the taxiway. The use of the silicon sealant is not recommended for the airside.

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Effect of Non-Conducting Filler Additions on Anisotropic Conductive Adhesives(ACAs) Properties and the Reliability of ACAs Flip Chip on Organic Substrates (이방성 전도 접착제 물성과 유기 기판 플립 칩의 신뢰성에 미치는 비전도성 충진재의 영향)

  • Im, Myeong-Jin;Baek, Gyeong-Uk
    • Korean Journal of Materials Research
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    • v.10 no.3
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    • pp.184-190
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    • 2000
  • We investigated the effect of filler content on the thermo-mechanical properties of modified ACA composite materials by incorporation of non-conducting fillers and the reliability of flip chip assembly on organic substrates using modified ACA composite materials. For the characterization of modified ACA s composites with different content of non-conducting fillers, differential scanning calorimeter (DSC), and thermo-gravimetric analyzer (TGA), dynamic mechanical analyzer (DMA), and thermo-mechnical analyzer (TMA) were utilized. As the non-conducting filler content increased, CTE values decreased and storage modulus at room temperature increased. In addition, the increase in the content of filler brought about the increase of Tg^{DSC}$ and $Tg^{TMA}$. However, the TGA behaviors stayed almost the same. Contact resistance changes were measured during reliability tests such as thermal cycling, high humidity and temperature, and high temperature at dry condition. It was observed that reliability results were significantly affected by CTEs of ACA materials especially at the thermal cycling test. Results showed that flip chip assembly using modified ACA composites with lower CTEs and higher modulus by loading non-conducting fillers exhibited better contact resistance behavior than conventional ACAs without non-conducting fillers.

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The Effect of Coupling Treatment to Graphite on Injection Processing (Injection 공정시 흑연의 실란 Coupling 처리 효과)

  • 조광연;김경자;박윤창;정윤중;임연수
    • Journal of the Korean Ceramic Society
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    • v.38 no.7
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    • pp.608-614
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    • 2001
  • 수지결합질 탄소재의 사출성형시 중요한 요소는 열유변학적 거동이다. 수지결합질 탄소재의 열유변성, 기계적 물성은 충진제(흑연)의 표면상태에 영향을 받는다. Coupling 처리에 의한 충진제의 표면개질은 binder와의 젖음성과 호환성 등에 영향을 미쳐 수지결합질 탄소재의 특성을 향상시킨다. 본 연구에서는 충진제의 표면개질을 위해 실란 coupling 처리하였다. 충진제의 표면에 코팅된 실라놀은 FT-IR과 침수거동 관찰결과 충진제 표면에 단층으로 코팅되었음을 보였다. Coupling 처리는 충진제 표면에 활성을 가함으로써 수지결합질 탄소재의 열유변학적 거동과 기계적 물성에 기여하였다.

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Properties of Polymer Nanocomposites Useful for Dental Restoration (치아수복용 고분자 나노복합체의 물성)

  • Kim, Ohyoung;Han, Sanghyuk;Seo, Kitaek;Gong, Myoung-Seon;Kim, Chang-Keun;Lim, Bum-Soon;Cho, Byeong-Hoon
    • Applied Chemistry for Engineering
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    • v.16 no.3
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    • pp.422-426
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    • 2005
  • Visible-light activated polymer nanocomposites (PNC) were designed to be used for dental restoration. Hybrid-filler composed of barium silicate and nano-sized silica was adopted as a filler system. To improve the interfacial be havior of the resin matrix of bisphenol A glycerolate methacrylate/triethyleneglycol dimethacrylate, the surface of filler was hydrophobically treated with a silane coupling agent. Mechanical properties of PNC were investigated by measuring the abrasion resistance, and it was discovered that PNC showed excellent properties with an increase of nanofiller content. However, the polymerization shrinkage was consistently maintained under 3 vol% and the shrinkage continued even after photo-polymerization. In addition, a slight color difference between PNC specimens was observed with increase of nanofiller content.

The Effect of Titanate Coupling Agents on the Electrical and Mechanical Properties of PVC-Ni Composite Systems (PVC-Ni 복합재의 전기적 ${\cdot}$ 기계적 성질에 미치는 Titanate Coupling Agent 의 영향)

  • Tak Jin Moon;Mi Kyung Lee;Sun Ho Kim
    • Journal of the Korean Chemical Society
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    • v.29 no.3
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    • pp.319-327
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    • 1985
  • The effect of titanate coupling agents on the electrical and mechanical properties of conductive poly (vinyl chloride)-nickel composite was studied as functions of filler concentration, the variation of the amount of titanate coupling agents and the type of titanate coupling agents. It was found that the electrical and mechanical properties of PVC-Ni system were improved by the treatment of titanate coupling agents, but the excessive use of titanate coupling agents influenced to give worse properties.

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A Study on the Volatile Organic Compounds Analysis Method for Visible Light-Responsive Photocatalyst Treated Vehicle Interior Materials (가시광촉매가 처리된 자동차 내장재의 VOC 분석방법에 대한 연구)

  • Choi, Sei Young
    • Elastomers and Composites
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    • v.48 no.3
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    • pp.221-224
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    • 2013
  • In this study, VOC analysis method of vehicle interior materials and parts treated to visible-light responsive photocatalyst was tested by sample bag filled with air instead of nitrogen. As a result, when analyzed VOC of vehicle interior materials and parts, sample bag filled with the nitrogen was not confirmed of effect reducing VOCs and formaldehyde. However, VOCs and formaldehyde of sample bag that was filled with air instead of nitrogen, decreased significantly. Reaction effect for visible light-responsive photocatalyst was confirmed that sample bag of vehicle interior materials and parts should be filled with air instead of nitrogen.

Characteristics of the Hardening Shrinkage and Creed of Eporxy Resin Concerte (에폭시 수지 콘크리트의 경화수축 및 크리이프 특성)

  • 허남철;연규석
    • Magazine of the Korea Concrete Institute
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    • v.2 no.1
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    • pp.109-119
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    • 1990
  • This study was accomplished to investigate the characteristics of hardening shrinkage and initial creep of epoxy resin concrete depending on the presence of filler. According to the test results, the hardening shrinkage was increased with increment of sLOrage temperature, and the ef¬feel of tempemture on the hardening shrinkage of epoxy resin concrete with 6% filler was more Significant than that of epoxy resin concrete without filler. Also, the initial creep strain was increased with loading times, stress--strength ratio and elastic strain, and the values for opoxy resin concrete with 6 % filler are higher than that for eposy resin concrete without filler.

Research on the Performance of Total Heat Exchanger in a Solar Air-Conditioning System (태양열 이용 냉난방 공조시스템 중 전열교환기 성능에 관한 연구)

  • Kim, K.H.;Choi, K.H.;Kum, J.S.;Kim, B.C.;Kim, J.R.
    • Solar Energy
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    • v.19 no.4
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    • pp.45-53
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    • 1999
  • This report Introduces a total heat exchanger in a solar air-conditioning system using Lithium Chloride(LiCl) solution. The hot and humid outside air is cooled and dehumidified by LiCl solution that is sprayed on the packed layer of the total heat exchanger. LiCl solution once diluted is concentrated again in a regenerator using solar energy. Three types as the packed materials were used in this experiment and the dehumidification performance was evaluated by the value of $k_xa(kg/h{\cdot}m^3{\cdot}{\Delta}x)$, overall mass transfer coefficient based on a humidity ratio potential difference, the influence of inlet LiCl solution flow rate, air flow rate, packed layer height on $k_xa$ was investigated. It was found that air flow rate, LiCl solution flow rate, packed layer height for all types had a great influnce on the value of $k_xa$.

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A Study on the Preparation and Mechanical Properties of Hybrid Composites Reinforced Waste FRP and Urethane Foam (폐 FRP/Urethane Foam 충진 혼성복합재의 제조 및 기계적 물성에 관한 연구)

  • 황택성;신경섭;박진원
    • Polymer Korea
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    • v.24 no.4
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    • pp.564-570
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    • 2000
  • The waste FRP occured in the fabrication of SMC (sheet molding compound) bathtubs and the waste polyurethane foam occured in electronic manufacture and waste insulator were applied as a soundproof and light weight pannel in the waste FRP unsaturated polyester matrix resin composites to recycle. The effect of filler contents on the mechanical properties and interfacial phenomena of the filler and matrix on the composites was evaluated. The tensile strength of composites reached its maximum value of 82.34 MPa when the filler content was 70 wt%, and the more content of reinforcement is increased, the more tensile modulus was decreased. The flexural strength and modulus of composites, reinforced 70 wt% with filler content, were dominant compared to the other samples to 72.5 MPa, 958.4 MPa respectively. When composite of reinforced 70 wt% with filler content, it was confirmed that pull out phenomena and cracks did not occur in the interface of reinforcement and matrix resin through the SEM observation. Also, waste FRP and urethane foam were dispersed well into matrix resin as filler.

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