• 제목, 요약, 키워드: silicone

검색결과 1,376건 처리시간 0.036초

ATH 의 입도에 따른 실리콘 고무의 특성 (Properties of Silicone Rubber According to the Addition of Different Particle Size of ATH)

  • 박효열;강동필;안명상;김대환;이후범;오세호
    • 한국전기전자재료학회:학술대회논문집
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    • pp.216-219
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    • 2002
  • Much quantity of anti-tracking agent, ATH is added to the silicone rubber for the protection of silicone rubber against surface discharge. Hydrophobicity recovery properties of silicone rubber could be different by the content, surface treatment state and particle size of ATH. Because hydrophobicity of silicone rubber is depend much on the surface state of ATH. In this paper, the properties of silicone rubber is investigated according to the addition of different particle size of ATH to the silicone rubber. Hydrophobicity recovery properties and arc resistance of silicone rubber were investigated according to the addition of different particle size of ATH. Hydrophobicity recovery properties of silicone rubber were evaluated by the measurement of contact angle.

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수소 축합 반응에 의한 폴리디메틸실록산 미세 발포체의 제조 및 물성분석 연구 (Preparation and characterization of poly(dimethylsiloxane) foam prepared by hydrogen condensation reaction)

  • 이수;문성진
    • 한국응용과학기술학회지
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    • v.33 no.4
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    • pp.802-812
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    • 2016
  • 실리콘 폼은 고성능 가스켓, 열 차폐, 진동 마운트 및 Enter 키 패드로 많은 산업 분야에서 난연성 소재로서 매우 유용하다. 실리콘 발포체는 실온에서 백금 촉매 및 무기필러 존재하에서 비닐기를 함유한 폴리실록산 (V-silicone) 및 수산기를 함유한 폴리실록산 (OH-silicone)과 하이드라이드를 함유한 폴리실록산 (H-silicone)의 수소와의 수소축합반응의해 가교와 발포를 동시에 일으켜 제조하였다. 이러한 방법은 종래의 발포와 경화를 각각 실시한 공정보다 매우 편리한 방법이다. 이 실험에 사용 된 기능성 실리콘수지들은 1.0 meq/g의 vinyl기를 가진 점도 20 Pa-s의 V-silicone과 0.4 meq/g의 수산기를 가진 점도 50 Pa-s의 OH-silicone 및 7.5 meq/g의 하이드라이드기를 함유한 점도 0.06 Pa.s.의 H-silicone으로 구성되어 있다. 본 연구에서는 실리콘의 종류 및 함량, 촉매, 충전제 등의 변화에 따른 실리콘수지 발포체의 구조 및 기계적 특성에 미치는 영향을 연구하였다. 백금 촉매는 실리콘 수지에 대하여 0.5 wt%이면 충분하였다. 낮은 점도의 OH-silicone의 첨가는 초기 발포 속도를 높이며 발포체 밀도는 감소시키지만, 낮은 점도의 V-silicone의 첨가는, 인장 강도뿐만 아니라 신율도 감소시킨다. SF-3 조건에서 얻은 실리콘수지 발포체의 밀도, 인장강도 및 신율을 각각 $0.58g/cm^3$, $3.51kg_f/cm^2$ 및 176 %를 얻을 수 있었다. 본 발포 시스템에서의 알루미나 충전재 역시 실리콘수지 발포체의 기계적 특성을 향상시키는 중요한 역할을 하였다.

실리콘 고무 복합재료의 물성에 대한 실리콘 오일의 영향 (Effects of silicone fluid in silicone rubber composite)

  • 한동희;강동필
    • 대한전기학회:학술대회논문집
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    • pp.1670-1672
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    • 1996
  • Silicone rubber composite is very suitable for insulation materials because of it's hydrophobicity, mass productivity, and design flexibility. A study of the diffusion of silicone fluid from the bulk to the surface of the silicone rubber composite using dynamic contact angle meter and scanning electron microscopy(SEM) is reported. A study of the mechanical strength of the silicone rubber composite having various silicone fluids and fluid contents is also reported. It has been found that the kind of silicone fluid affects the diffusion rate of the silicone fluid from the bulk to the surface of the silicone rubber composite after artificial pollution.

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Clay의 종류 및 표면처리가 silicone rubber/clay 복합체의 물성에 미치는 영향 (Physical Properties of Silicone Rubber/Clay Composites According to the Clay Type and Modification)

  • 윤진산;김응수;김은정;이태화
    • Elastomers and Composites
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    • v.44 no.3
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    • pp.260-268
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    • 2009
  • Clay의 표면을 bis[(3-triethoxysilylpropyl)tetra sulfide (TSS)으로 처리하면 clay 표면의 소수성이 증가 될 뿐만 아니라 high temperature vulcanization 형 silicone rubber(HTV)와 화학적 반응이 가능하기 때문에 clay와 silicone rubber 사이의 상용성이 향상될 수 있을 것으로 예상되어 TSS를 이용하여 Na-MMT와 Fe-MMT의 silicate 층 표면에 tetra sulfide 그룹을 도입시킨 Na-$MMTS_4$와 Fe-$MMTS_4$를 각각 제작하였다. 이들 clay를 HTV silicone rubber와 compounding하여 silicone rubber/clay composites를 제작하였으며, clay의 종류 및 표면개질에 따른 silicone rubber 복합체의 열적안정성 및 기계적 물성을 평가하였다.

ATH의 입자크기 및 첨가량에 따른 실리콘 고무의 전기적 특성 (Electrical Properties of Silicone Rubber with Different Particle Size and Amount of ATH)

  • 박효열;강동필;안명상;명인혜;이태희;이태주
    • 한국전기전자재료학회:학술대회논문집
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    • pp.227-230
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    • 2003
  • Silicone rubber has very excellent chemical stability and hydrophobicity. A hydrophobic surface can prevent the formation of continuous water films on the surface in wet and heavily contaminated conditions. This phenomenon contributes to the suppression of leakage current and partial discharges on insulator surfaces. Silicone rubber has been used much for housing materials of polymer insulators. ATH is added to the silicone rubber for improvement of its resistance against surface discharge. In this paper, ATH with different particle size and content was added to the silicone rubber during compounding. Silicone rubber was deteriorated by a corona treatment. Hydrophobicity recovery rate after corona treatment and arc resistance of silicone rubber were investigated. Hydrophobicity recovery rate of silicone rubber was evaluated by the measurement of contact angle. Arc resistance was evaluated by measuring weight loss of silicone rubber after arc resistance test. It was observed that the hydrophobicity recovery rate and arc resistance of silicone rubber were different when different particle size and content of ATH were added.

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경화 및 냉각을 거친 LED 패키징 실리콘의 잔류응력에 대한 수치해석적 고찰 (A numerical study on the residual stress in LED encapsulment silicone after curing and cooling)

  • 송민재;김권희;강정진;김흥규
    • 한국소성가공학회:학술대회논문집
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    • pp.425-428
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    • 2009
  • Silicone is recently used for LED chip encapsulment due to its good thermal stability and optical transmittance. To mold a solid-state silicone encapsulment, curing by mixing at elevated temperatures followed by cooling is necessary. As the silicone molding process is involved in healing and subsequent cooling, the thermal residual stress, which causes mechanical warpage or optical birefringence in the final silicone encapsulment, may be induced if there are non-uniformities in cured silicone material properties or encapsulment shape design. The prediction of residual stress is necessary to design a high-quality silicone molding process. Therefore, in the present paper, a numerical parametric study was attempted to evaluate the heating and cooling effects on the thermal residual stress induced in the cured silicone.

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마이카 강화 실리콘 복합재료의 제작과 그 유전적 특성에 관한 연구 (A Study on the Dielectric Properties of Mica-reinforced Silicone Composites)

  • 조정수;곽영순;김순태;박차수;박정후
    • 대한전기학회논문지
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    • v.41 no.6
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    • pp.640-651
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    • 1992
  • This paper describes the electric properties of mica reinforced silicone composites with the parameter of curing condition of silicone resin, application amount of silane coupling agent to the mica paper and the mica wt% to the composite. Heat-resistant silicone resin and mica paper made of mica flakes are used to prepared the mica/silicone composite as matrix and filler, respectively. To improve the dielectric properties and interfacial adhesion between matrix and filler, silane coupling agent is applied on the mica paper. As for matrix, tan$\delta$ value of 30$0^{\circ}C$ heat-treated silicone resin is the lowest under 1%. The optimal wt% of coupling agent is 0.3% to the weight of mica paper. 80 wt% of mica as filler to the mica/silicone composite shows the best electric properties. And the mica reinforced silicone composite shows good high-frequency and mechanical tensile stress properties.

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자외선 조사에 따른 실리콘 교무에 존재하는 가동성 저분자량 성분의 거동 (The Behavior of Low Molecular Weight Silicone Fluids in Silicone Rubber)

  • 홍주일;이기택;서유진;황선묵;허창수
    • 한국전기전자재료학회:학술대회논문집
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    • pp.312-315
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    • 2004
  • In this paper we investigated the behavior of low molecular weight silicone fluids in silicone rubber by W treatment with solvent-extraction and GPC. It was shown that LMW quantity which was extracted by solvent-extraction was decreased in UV treatment time. $200{\sim}450\;g/mol$ distribution of LMW silicone fluid was contributed to recovery. It was similar to result from corona discharge. Morphological analysis was investigated by scanning electron microscope(SEM) and X-ray diffraction (XRD). The behavior of LMW silicone fluids in silicone rubber which was contributed to recovery was discussed.

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Encapsulation용 silicone을 사용한 모듈제조 공정에 대한 연구 (The study on PV module development using the silicone encapsulation)

  • 정인성;이우진;이범수;양오봉;정은석;김종일
    • 한국신재생에너지학회:학술대회논문집
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    • pp.130.1-130.1
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    • 2011
  • Nowadays, the number of PV module corporation is increasing due to demand growth of silicon solar module. However almost study of module is research about increasing of efficiency for it. This study is evaluation and development for process of module using the silicone encapsulation material instead of existing EVA sheet. We are changed adding material ratio on silicone and thickness of silicone. So we get better efficiency than EVA sheet through the evaluation for silicone liquid and modulation. Also, we are test after establishing manufacture system being able to quicker than existing modules line. The result of EVA sheet is average 207.47W and silicone material is 211.32W so we think that silicone is better than EVA sheet.

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소수성 모노머들을 포함한 콘택트렌즈의 특성에 관한 연구 (Study on Characterization of Contact Lens with Hydrophobic Monomers)

  • 예기훈;김태훈;성아영
    • 한국안광학회지
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    • v.13 no.3
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    • pp.29-34
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    • 2008
  • 목적: 본 연구에서는 HEMA(2-Hydroxyethyl methacrylate)/Silicone 기본 조합에 각각 BMA(Butyl methacrylate)와 MMA(Methyl methacrylate)를 혼합하여 콘택트렌즈의 재료로 사용한 후, 각각의 물리적 특성을 비교하였다. 방법: 캐스트 몰드 법을 이용하여 각각의 렌즈를 제조 하였으며, 각 시료의 물리적 특성에 대한 평균값을 사용하여 분석하였다. 결과: HEMA/silicone/BMA 조합의 경우, 함수율은 24.69%에서 29.26%, 인장강도는 0.109 kgf에서 0.263 kgf의 분포를 나타내었다. HEMA/silicone/MMA 조합의 경우, 팽윤율은 13.56%에서 14.83%, 함수율은 25.61%에서 29.33%, 인장강도는 0.107 kgf에서 0.286 kgf의 분포를 나타내었다. 결론: 두 조합은 HEMA/silicone(0.20%~11.50%)의 기본 조합에서 BMA(5.15%)와 MMA(5.15%)를 일정량 첨가한 것으로 두 경우 모두에서 BMA의 양과 MMA의 양이 상대적으로 감소할수록 팽윤율과 함수율이 증가하는 경향을 보였다. HEMA/silicone/MMA 조합의 경우, 인장강도는 silicone의 비율이 증가할수록 4-MMA 시료까지는 다소 증가하는 경향을, HEMA/silicone/BMA 조합의 경우, 인장강도는 silicone의 비율이 증가할수록 감소하는 경향을 나타내었다.

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