• 제목/요약/키워드: Adhesion Strength

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타일시멘트 접착강도에 미치는 Substrate 종류의 영향 (Effects of substrate type on adhesion strength of cementitious tile adhesive)

  • 최낙운;김성훈;김은정
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2010년도 춘계 학술대회 제22권1호
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    • pp.325-326
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    • 2010
  • 최근 타일접착제 시장이 성장함에 따라 이에 관한 국제규정인 ISO 13007이 제정 되었으며, 세계 각국에서 동(同)규정의 전면적 혹은 부분적 수용을 통한 자국규정의 개정활동이 활발히 이루어지고 있다. 국내에서도 타일접착제 관련 KS규정의 국제규정 부합화에 대한 필요성이 대두되고 있다. 본 연구에서는 타일접착제 국제규정의 국내 도입을 앞두고 타일시멘트의 중요한 성능지표인 접착강도에 미치는 하지 종류의 영향을 검토함으로써 국제규준에 적합한 접착하지의 확보방안을 제안하고자 하였다.

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플라즈마 용사법에 의한 $Al_2$O$_3$ 피복층의 열처리효과에 관한 연구 (The Heat Treatment Characterization of Plasma Sprayed Alumina Coatings)

  • 오익현;김한산;김수식
    • 한국표면공학회지
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    • 제27권3호
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    • pp.134-142
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    • 1994
  • $Al_2O_3$coatings on mild steel substrate by plasma spray process were produced to evaluate microstructural characterization and mechanical properties. As-coated $Al_2O_3$coating samplessd were subjected to two heat treat-ment conditions : ⅰ) annealing under vacuum circumstance, ⅱ) hot press treated condition. The two heat treat-ed coatings were investigated in terms of microhardness, adhesion strength, wear resistance, porosity forma-tion, and microstructures. In the case of the coatings which were subject to preparation step ⅰ, the porosity in the coating was decreased with the increase of temperature ($700^{\circ}C$-$1100^{\circ}C$), and the wear resistance, microhardnesss and adhesion strength were increased with the increase of temperature. On the other hand, in the case of the coatings which were subject to preparation step ⅱ, wear resistance and adhesion strength were improved with the increase of temperature and pressure. Experimental measurements of coatings which were produced by both preparation conditions were enhanced compare to those of as-coated coatings.

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순간금형가열법에 의해 제작된 ABS의 pH변화에 따른 무전해 Ni도금 특성 (Effects of pH Variation on the Properties of Electroless Nickel Plating on ABS Made by MmSH)

  • 송태환;박소연;이종권;류근걸;이윤배;이미영
    • 한국산학기술학회논문지
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    • 제5권5호
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    • pp.433-437
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    • 2004
  • The MmSH is a process of injecting ABS to produce innovated physical properties compared to the conventional injection process. Physical properties such as thickness and adhesion strength of Ni plate electrolessly coated on a conventional and a MmSH injected ABS have been studied in the pH range 4~8. Thickness of the plate on the MmSH and the conventionally injected ABS appeared to be directly proportional to pH. The ABS processed by the conventional injection showed adhesion strength corresponded to ASTM 4B above pH 5. On the other hand, the ABS processed by the MmSH injection showed a superior adhesion strength corresponded to ASTM 5B above pH 6. It was calculated the shielding effectiveness of above 50 dB in all conditions.

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수용성 필름이 일체화된 역타설 고무 아스팔트 방수시트의 콘크리트 타설시 가수 여부에 따른 부착성능 변화 연구 (Adhesion Performance Change of Positive-side Installed Rubber Asphalt Waterproof Sheet Integrated with Water-Soluble Film in Accordance to Wetness Condition)

  • 안기원;강효진;김천학;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 추계 학술논문 발표대회
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    • pp.229-230
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    • 2019
  • Integrated water-soluble film is dissolved in the rubber asphalt waterproof sheet to secure adhesive strength on freshly cast concrete on the adhesion side of waterproofing layer on the floor slab. In addition, in order to determine whether the water in the concrete slurry can dissolve the water-soluble film sufficiently, the adhesive strength of the waterproofing sheet was compared between difference wetness condition at the upper part of the concrete specimen before the concrete casting.

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계면확산에 의한 고분자 코팅된 탄소섬유의 계면접착력 변화 연구 (Effect of Diffusion on the Adhesion Behavior of Polymer Coated Carbon Fibers with Vinyl Ester Resins)

  • T. H. Yoon;H. M. Kang
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 1999년도 추계학술발표대회 논문집
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    • pp.32-35
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    • 1999
  • Poly(arylene ether phosphin oxide) (PEPO), Udel$^{\circledR}$ P-1700, Ultem$^{\circledR}$ 1000. poly(hydroxy ether) (PHE), carboxy modified poly(hydroxy ether)(C-PHE) and poly(hydroxy ether ethanol amine) (PHEA) were utilized for a coating of carbon fibers. Interfacial shear strength(IFSS) of polymers to carbon fibers was also evaluated in order to understand the adhesion mechanism. IFSS was measured via micro-droplet tests, and failure surfaces were analyzed by SEM. Diffusion between polymer and vinyl ester resin was investigated as a function of styrene content; 33. 40 or 50wt.% and the solubility parameters of polymers were calculated. The results were correlated to the interfacial shear strength. The highly enhanced interfacial shear strength (IFSS) was obtained with PEPO coating, and marginally improved IFSS with PHE, Udel$^{\circledR}$ and C-PHE coatings, but no improvement with PHEA and Ultem$^{\circledR}$ coatings.

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Thiol-ene 반응을 이용한 UV경화형 SIS/SBS계 점착제의 점착물성 (Pressure Sensitive Adhesion Performances of SIS/SBS based UV-curable Pressure Sensitive Adhesives using Thiol-ene Reaction)

  • 임동혁;도현성;김현중;윤관희;방정석
    • 접착 및 계면
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    • 제6권3호
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    • pp.19-25
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    • 2005
  • 합성 고무계 점착제는 일반적으로 SIS나 SBS 블록 공중합체와 점착부여수지, 가소제, 기타 첨가제를 함유한다. SIS/SBS 계 점착제는 우수한 접착력에도 불구하고 내용제성이나 내열성이 낮아서 그 사용에 한계가 있다. 이에 이러한 단점을 보완하고자 SIS/SBS 점착제에 가교제, 광개시제를 주성분으로 하는 자외선 경화 시스템을 도입하였다. 제조된 점착제는 thiol-ene 광중합 반응에 의해 가교하였으며 점착제의 프로브 택(probe tack), 박리강도(peel strength) 전단접착파괴온도(shear adhsion failure temperature, SAFT)를 측정하여 UV 경화형 점착특성을 고찰하였다. 또한 UV 경화형 점착제의 택 성질을 프로브 택을 이용하여 프로브 재료별, 점착제의 두께별의 영향을 살펴보았고 접촉각 측정을 통해 점착제 표면 변화를 살펴보았다.

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철근 도장용 폴리머 시멘트 슬러리의 부착 특성 (Properties of Adhesion Tension of Polymer Cement Slurry for Coated Reinforcing Bar)

  • 김현기;이철웅;장성주;김완기;소양섭
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 봄 학술발표회 논문집
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    • pp.343-348
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    • 2000
  • The purpose of this study is to clarify properties adhesive strength of polymer-cement slurry for coated reinforcing bars. The epoxy coating material is superior to performance of anti-corrosion but lately age adhesive strength between concrete raise to structural problems. However, polymer dispersion with excellent performance of elasticity and adhesion can solve this problems. From the test results. adhesion of steel with polymer cement slurry using St/BA emulsion is show excellent without concerned coating thickness, and polymer cement slurry using St/BA emulsion is show adhesion in tension 1.2~2.2MPa at polymer cement ratio 50% of more.

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특수처리 입상비료를 이용한 포러스콘크리트의 해양식물 부착특성에 관한 연구 (Marine Plant Adhesion Properties of Porous Concrete Using Specially Treated Granular Fertilizer)

  • 이병재;박승범;이준;손성우;조광연
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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    • pp.893-896
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    • 2006
  • This study examined plant adhesion characteristics of the porous concrete that used specially treated granular fertilizer for field application, which was used for the restoration of the marine ecosystem. The results of the experiment showed that nutrient eruption amount, the destruction and dissolution ratio tended to decrease when the coating thickness was increased. The void ratio and compressive strength tended to decrease when the specially treated granular fertilizer mixing ratio was increased. According to these results, the appropriate thickness of coating for cement coated granular fertilizer was 1.0mm. The adhesion ability of marine plant to porous concrete was superior when the cement coated granular fertilizer was mixed. Therefore, the appropriate cement coated granular fertilizer mixing ratio of 20% with a coating thickness of 1.0mm is thought to be a factor when considering the strength of the porous concrete for marine ecosystem restoration and the adhesion characteristics of marine plant.

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Determination of the Failure Paths of Leadframe/EMC Joints

  • Lee, H.Y.;Kim, S.R.
    • 한국표면공학회지
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    • 제33권4호
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    • pp.241-250
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    • 2000
  • Popcorn cracking phenomena frequently occur in thin plastic packages during the solder reflow process, which are definitely affected by poor adhesion of Cu-based leadframe to epoxy molding compounds (EMCs). In the present work, in order to enhance the adhesion strength, a brown-oxide treatment on the Cu-based leadframe was carried out and the adhesion strength of leadframe/EMC interface was measured in terms of fracture toughness by using sandwiched double-cantilever beam (SDCB) specimens. After the adhesion tests, fracture surfaces were analyzed by SEM, AES, EDS and AFM to make the failure path clear. Results showed that failure path was closely related to the oxidation time and the interfacial fracture toughness.

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Ag/에폭시간 계면 접착력 향상을 위한 전해 실란 처리 (Electrolytic silane deposition to improve the interfacial adhesion Ag and epoxy substrate)

  • 공원효;박광렬;류호준;배인섭;강성일;최승회
    • 한국표면공학회지
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    • 제56권1호
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    • pp.77-83
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    • 2023
  • The reliability of leadframe-based semiconductor package depends on the adhesion between metal and epoxy molding compound (EMC). In this study, the Ag surface was electrochemically treated in a solution containing silanes in order to improve the adhesion between Ag and epoxy substrate. After electrochemical treatment, the thin silane layer was deposited on the Ag surface, whereby the peel strength between Ag and epoxy substrate was clearly improved. The improvement of peel strength depended on the functional group of silane, implying the chemical linkage between Ag and epoxy.