• Title, Summary, Keyword: Adhesion Properties

Search Result 1,532, Processing Time 0.052 seconds

Study on Adhesion and Mechanical Properties of Adhesive Resin Using Microcapsule with Isocyanate Compound (이소시아네이트를 포함하는 Microcapsule을 사용한 접착수지의 특성에 관한 연구)

  • Kim, Dong Ho;Kim, Gu Ni
    • Journal of Adhesion and Interface
    • /
    • v.15 no.3
    • /
    • pp.109-115
    • /
    • 2014
  • In this study, we synthesized and identified microcapsule containing isocyanate, and investigated the mechanical and adhesion properties of polyurethane resin by adding microcapsule. We found out that the core material of microcapsule and the component weight fraction of microcapsule from the FT-IR and TGA analysis. From the results of adhesion and mechanical property tests, we confirmed that in case of using microcapsule for adhesive resin composition, adhesion strength, tensile strength and abrasion were improved by cross-linking reaction between urethane and IPDI in microcapsule.

Evaluation of Ice Adhesion Strength on the Oxidation of Transmission Line ACSR Cable (송전선로 ACSR 케이블의 산화에 따른 결빙 특성 평가)

  • Cho, Hui Jae;Kim, You Sub;Jung, Yong Chan;Lee, Soo Yeol
    • Korean Journal of Materials Research
    • /
    • v.29 no.6
    • /
    • pp.378-384
    • /
    • 2019
  • Ice accumulation on Aluminum Conductor Steel Reinforced(ACSR) cable during winter is an important matter in terms of safety, economy, and efficient power supply. In this work, the ice adhesion strengths of ACSR cable oxidized during different periods(7 years oxidized and 15 years oxidized) are evaluated. At first, a plate type dry oxidation standard specimen, whose surface characteristics are similar to those of ACSR cable, is prepared. Dry oxidation standard specimens are heat-treated at $500^{\circ}C$ for 20, 60, and 120 minutes in order to obtain different degrees of oxidation. After the dry oxidation, surface properties are analyzed using contact angle analyzer, atomic force microscopy, spectrophotometer, and gloss meter. The ice adhesion strengths are measured using an ice pull-off tester. Correlations between the surface properties and the ice adhesion strength are obtained through a regression analysis indicating a Boltzmann equation. It is revealed that the ice adhesion strength of 15-year oxidized ACSR cable is approximately 8 times higher than that of ACSR-bare.

Structural Effect of Conductive Carbons on the Adhesion and Electrochemical Behavior of LiNi0.4Mn0.4Co0.2O2 Cathode for Lithium Ion Batteries

  • Latifatu, Mohammed;Bon, Chris Yeajoon;Lee, Kwang Se;Hamenu, Louis;Kim, Yong Il;Lee, Yun Jung;Lee, Yong Min;Ko, Jang Myoun
    • Journal of Electrochemical Science and Technology
    • /
    • v.9 no.4
    • /
    • pp.330-338
    • /
    • 2018
  • The adhesion strength as well as the electrochemical properties of $LiNi_{0.4}Mn_{0.4}Co_{0.2}O_2$ electrodes containing various conductive carbons (CC) such as fiber-like carbon, vapor-grown carbon fiber, carbon nanotubes, particle-like carbon, Super P, and Ketjen black is compared. The morphological properties is investigated using scanning electron microscope to reveal the interaction between the different CC and the active material. The surface and interfacial cutting analysis system is also used to measure the adhesion strength between the aluminum current collector and the composite film, and the adhesion strength between the active material and the CC of the electrodes. The results obtained from the measured adhesion strength points to the fact that the structure and the particle size of CC additives have tremendous influence on the binding property of the composite electrodes, and this in turn affects the electrochemical property of the configured electrodes.

Modern State of Models for Fundamental Adhesion - A Review Extended Abstract

  • Possart, Wulff
    • Journal of Adhesion and Interface
    • /
    • v.3 no.1
    • /
    • pp.43-51
    • /
    • 2002
  • Advanced adhesive technologies and demanding applications of adhesive joints can no longer be developed successfully by the traditional "trial and error" approach. Appropriate technical solutions require reference to a reliable basis of well-established scientific knowledge about the elementary mechanisms of adhesion (i.e. the 'fundamental adhesion') as they are responsible for the capability of the compound w transmit mechanical force between the adhesive and the substrate surface (i.e. the 'practical adhesion'). Adhesion mechanisms also influence the formation of polymer structure in the adhesive and the resulting macromolecular dynamics in the interphase that is formed in the adhesive near to the substrate. These manifold molecular factors rule the macroscopic behaviour of an adhesive bond line in terms of mechanical and other physical properties as well as in terms of durability. This paper reviews the level of refinement that understanding of fundamental adhesion has achieved up to now.

  • PDF

A Study on Improvement of Thermal and Adhesion Properties of Stone/Wood Composites for Stone Bed using CNT-epoxy Adhesive (CNT/Epoxy 접착제를 이용한 돌침대용 석재/목재 복합재의 열적특성 및 접착특성 개선 연구)

  • Kim, Jong-Hyun;Shin, Pyeong-Su;Kwon, Dong-Jun;Moon, Sun-Ok;Park, Joung-Man
    • Composites Research
    • /
    • v.29 no.5
    • /
    • pp.276-281
    • /
    • 2016
  • Improvement of the thermal and adhesion properties of stone/wood composites was studied. Tensile test was performed for wood and stone to know the basic mechanical properties. Real-time temperature of stone and wood was measured when stone and wood was heated. To compare thermal transfer properties of stone/wood composites, two types of specimens were tested: one was stone upper whereas another was wood upper. Real time temperature measurement and lap shear test were performed to know thermal and adhesion properties by using CNT-epoxy adhesive in which CNT was dispersed in epoxy adhesive uniformly. The thermal transfer property was better for the wood upper case than stone upper case. Adding CNT improved the heat transfer as well as mechanical properties including lap shear strength.

Adhesion Properties of Rubber Composite with Direct Blending Technique and Adhesive Composition (직접블렌딩 기술과 접착제 조성이 고무복합체 물성에 미치는 영향)

  • Lee, Seong-Jae;Chang, Young-Wook;Chung, Kyung-Ho
    • Elastomers and Composites
    • /
    • v.34 no.3
    • /
    • pp.253-261
    • /
    • 1999
  • The cure properties of rubber compounds containing different adhesive compositions were examined. As the amounts of tannin were increased in the adhesive composition, the scorch time was increased and cure rate was decreased due to the size and shape of tannin molecules. Also, the effect of adhesive composition on the adhesion between rubber and fiber was examined by TCAT(Tire Cord Adhesion Test), The reinforcing cords used in this study were mon ofilaments of nylon 610 and nylon 66. According to the results, the optimum adhesion strength between rubber and fiber could be obtained with adhesives whose molar ratios of formaldehyde/resorcinol were above 5/1 in the recipes. Although the level of dip pick-up(DPU) on the reinforcing cord affects the adhesion strength, the DPU of nylon 610 monofilament did not affect the adhesion strength because the level of DPU was constant regardless of the adhesive compositions. In this case, the adhesion strength with the adhesive composition could be explained with the behavior of tannin in the adhesive.

  • PDF

Physical Properties of UV-Curable Powder Coatings with Different Photoinitiator Contents (광개시제의 함량에 따른 UV 경화형 분체도료의 물리적 특성)

  • Moon, Je-Ik;Choi, Jae-Hoon;Hwang, Hyun-Deuk;Kim, Hyun-Joong;Kim, Nam-Hong
    • Journal of Adhesion and Interface
    • /
    • v.9 no.2
    • /
    • pp.32-37
    • /
    • 2008
  • A series of UV-curable powder coatings with different contents of photoinitiator (0.5 wt%, 1 wt%, 2 wt%) were formulated and measured gel content, tensile strength of cured film. Heat-sensitive substrates such as MDF, plywood and PVC were coated UV-curable powder and cured coatings were measured physical properties by pendulum hardness tester, glossmeter, pull-off adhesion tester. With increasing photoinitiator content, adhesion force between coating and substrate decreased because of crosslinking density increasing. The results of pendulum hardness was not significantly changed but gloss was changed according to different substrates. Adhesion of UV-curable coatings was enough to apply for heat-sensitive substrates. From these results, we concluded that contents of photoinitiator was a effective factor in UV-curable powder coatings. UV-curable coatings was a portential candidate for heat-sensitive substrates.

  • PDF

A Study on Adhesion of Mechanical Properties of Rubber by Water-soluble salt (수용성염에 의한 고무의 접착특성 및 기계적 강도)

  • Kim, Seong-hye;Jeon, Jun-Ha;Um, Gi-Yong
    • Journal of Adhesion and Interface
    • /
    • v.19 no.2
    • /
    • pp.55-59
    • /
    • 2018
  • In this study, to overcome a complicated shoe adhesion process such as buffing, pre-treatment by primer in the rubber component of the shoe, we studied adhesion mechanical properties with rubber compound added water-soluble salt for the purpose of improving the adhesion between midsole and outsole. Acid salts, basic salt and neutral salts were evaluated, rubber containing basic salts showed excellent adhesion to water-based adhesion. Since the basic salt is present as the hydroxy salt, the surface of rubber is hydrophilized. The results are confirmed by contact angle and IR spectroscopy measurement. In addition, in the case of rubber compound added basic salts, NBS abrasion resistance and hardness were increased by increasing crosslink density, but crosslink time was delayed.

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

  • 김현기;이철웅;장성주;김완기;소양섭
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • /
    • pp.343-348
    • /
    • 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.

  • PDF

Construction and adhesion performance of biomass tetrahydro-geraniol-based sustainable/transparent pressure sensitive adhesives

  • Baek, Seung-Suk;Jang, Su-Hee;Hwang, Seok-Ho
    • Journal of Industrial and Engineering Chemistry
    • /
    • v.53
    • /
    • pp.429-434
    • /
    • 2017
  • Using the tetrahydro-geraniol acrylate (TGA) synthesized from biomass tetrahydro-geraniol, UV-cured transparent acrylic pressure sensitive adhesives (PSAs) composed of semi-interpenetrating networks were successfully fabricated. The utility for optically clear adhesive on adhesion performances according to various concentrations of TGA in the acrylic PSAs were investigated. After characterizing the photo-polymerized PSA syrups, the optical properties for the acrylic PSA films were examined using UV-vis spectroscopy, a color-difference meter, and a haze meter. The acrylic PSAs exhibited high transparency and stable weather-ability under reliability testing (85/85 test). With increasing TGA concentration in the acrylic PSAs, adhesion properties such as the $180^{\circ}$ peel strength,shear holding power, and probe tack had decreased.