• Title/Summary/Keyword: polyurethane adhesive

검색결과 121건 처리시간 0.023초

산성유해가스 제거를 위한 고효율 음이온교환 복합 폼 화학필터의 제조 (High Efficiency Hybrid Ion Exchange Chemical Filter for Removal of Acidic Harmful Gases)

  • 정윤서;김인식;현승미;황택성
    • 공업화학
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    • 제28권5호
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    • pp.539-546
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    • 2017
  • 본 연구는 산성유해가스 제거를 위한 고효율 음이온교환 복합 폼 화학필터를 제조하기 위하여 폴리우레탄(PU) foam에 다른 종류의 PSA를 사용하여 상용이온교환수지를 부착하여 제조, 이의 내수성, 내화학성, 접착신율, 농도와 유속에 따른 HCl과 HF의 흡착특성에 관하여 연구하였다. 그 결과 접착신율은 ATE-701은 900%, AT-4000C는 1,500%, HCA-1000는 2,400%이며, 내수성 및 내화학성평가에서 HCA-1000의 탈리율이 6% 미만으로 우수한 내구성을 가짐을 확인하였다. HCl, HF의 농도와 유속이 증가함에 따라 흡착이 빠르게 일어났으며 유속과 농도에 관계없이 110 min 이후 100% 흡착파과평형이 일어남을 확인할 수 있었다. 또한 SEM Morphology 관찰 결과 점착제가 고르게 분산되어 있고 이온교환수지의 다공구조가 유지되었으며, 흡-탈착 공정에서 성능저하가 없는 것으로 보아 내구성이 있음을 확인하였다.

상전이 물질을 함유하는 수분산 PU에서 계면활성제의 효과 (Effects of Several Surfactants in the WBPU/Octadecane as a Phase Change Material)

  • Jang, Jae-Hyuk;Lee, Young-Hee;Kim, Han-Do
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 봄 학술발표회 논문집
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    • pp.287-288
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    • 2003
  • Polyurethane(PU) materials have been generally used in the automobile, paint, furniture, adhesive, and textile industries. The use of Waterborne PU was motivated form the environmental point of view, i.e. reduction of solvent emissions into the atmosphere(volatile organic compounds, VOC)[1]. Generally speaking, phase change materials (PCM) have the capability of absorbing or releasing thermal energy to reduce or eliminate heat transfer at the temperature range of the particular temperature stabilizing material[2]. (omitted)

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투명전도막 및 고분자 재료의 표면처리 (Surface Treatment of Transparent Conductive films and Polymer Materials)

  • 이봉주;이현규;정수복;이경섭;김형곤;정환기
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 춘계학술대회 논문집 센서 박막재료
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    • pp.15-17
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    • 2001
  • A new possibility of our atmospheric cold plasma torch has been examined on the surface treatment of an air-exposed vulcanized rubber compound. The plasma treatment effect was evaluated by the bondability with another rubber compound using a polyurethane adhesive.

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Hybridization and Functionalization of Aqueous-based Polyurethanes

  • Chen, Kan-Nan
    • 한국고분자학회:학술대회논문집
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    • 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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    • pp.129-129
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    • 2006
  • Conventional solvent-based polyurethane (PU) is well established for wide applications, such as textile treatments, surface coating, adhesive and so on. Due to the demands of safety, economic, and environmental protection, the solvent-based PU is restricted and has been phasing out and aqueous-based PU is becoming the world market trend, which is an environmental friendly product. The chemical resistance, physical and mechanical properties of aqueous-based PU are still not competible with solvent-based PU. Because of aqueous-based PU is a linear thermoplastic polymer with lower average molecular weight. Their improvements are normally performed by a post-curing reaction or a polymer hybridization to enhance the polymer cross-linking density. Hybridization of PU with aqueous-based epoxy resin or acrylate emulsion and then cured by a curing agent for improving the performance properties and reducing the cost of aqueous-based PU.Furthermore, a special function is added to aqueous-based PU increasing the application value, for examples, flame retardation, polymeric dyes, hydrophilic and etc.

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Preparation and Properties of Polyolefin Graft Polymer available as a Primer for Polyurethane Adhesive (I) Synthesis of polyolefins with cyclic acid anhydride by free radical graft polymerization

  • Ryu, Ki Jung;Kim, Min Jung;Min, Seong Kee;Lee, Won Kee;Park, Chan Young
    • Elastomers and Composites
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    • 제50권2호
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    • pp.119-125
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    • 2015
  • Because of their low surface free energy and absence of polar groups at the surface, polyolefins are substrates whose wetting and adhesion are very difficult. Free radical grafting of monomers to backbone polymer is one of the most attractive ways for the chemical modification of polymers. Synthesis of graft copolymer through graft polymerizations of PE and/or PP with phthalic anhydride (PhAn) was made and FTIR spectra of the graft polymer were the examined. And also the effects of phthalic anhydride content on the grafting ratio, thermal properties and contact angle of the graft polymer were examined.

Surface Treatment of Polymer Materials and Transparent Conductive Films

  • Lee, Bong-Ju;Lee, Kyung-Sup
    • Transactions on Electrical and Electronic Materials
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    • 제2권4호
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    • pp.7-10
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    • 2001
  • A new possibility of our atmospheric cold plasma torch has been examined on the surface treatment of an air-exposed vulcanized rubber compound. The plasma treatment effect was evaluated by the bondability with another rubber compound using a polyurethane adhesive. The adhesion property was improved by the treatment with plasma containing oxygen radicals. The oxygen radical generation from the plasma was verified and its efficiency was found to be dependent on the cathode material.

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EVA계 핫멜트 접착제의 조성이 접착력에 미치는 영향 (Effect of Composition of EVA-based Hot-Melt Adhesives on Adhesive Strength)

  • 이정준;송유현;임상균;박대순;성익경;진인주
    • 접착 및 계면
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    • 제11권4호
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    • pp.155-161
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    • 2010
  • 점착부여수지의 종류와 함량을 달리하여 에틸렌비닐아세테이트 공중합체(Ethylene Vinyl Acetate Copolymer, EVA)를 베이스 폴리머로 하는 핫멜트 접착제를 제조하고, 그것들의 유변학적 거동과 폴리우레탄 기재에 대한 T-peel 접착력을 평가하였다. C5 지방족 석유수지, C9 방향족 석유수지, 수소가 첨가된 디사이클로펜타디엔 석유수지 그리고, 디사이클로펜타디엔/아크릴 모노머 공중합 석유수지가 각각 핫멜트 접착제의 점착부여수지로 사용되었다. 점착부여수지의 산소 함량을 분석하여 점착부여수지의 극성도를 측정하였는데, 디사이클로펜타디엔/아크릴 모노머 공중합 석유수지가 다른 점착부여수지보다 산소 함량이 높은 것을 확인하였다. 디사이클로펜타디엔/아크릴 모노머 공중합 석유수지만이 EVA와 완전한 혼화성을 보였고, 핫멜트 접착제는 모든 조성에서 균일상을 나타내었다. 핫멜트 접착제와 폴리우레탄 기재와의 T-peel 접착력은 핫멜트 접착제 자체의 저장탄성계수(G')보다는 핫멜트 접착제에 첨가된 점착부여수지의 극성도에 의해서 좌우됨이 확인되었다.

대기압 플라즈마를 이용한 전도성 고분자 코팅 필름 제조 (Fabrication of a Film Coated with Conducting Polymer Using One Atmospheric Pressure Plasma)

  • 정진석;양인영;명성운;최호석;김종훈
    • 폴리머
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    • 제31권4호
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    • pp.308-314
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    • 2007
  • 범용 고분자 표면에 전도성 부여와 범용 고분자와 전도성 고분자층의 접합력 향상을 목적으로 폴리우레탄 (PU)-graft-poly(acrylic acid)(PAAc)/폴리아닐린(PU-g-AAc/PANI) 복합체 필름을 제조하였다. ATR-FTIR과 XPS분석 결과, 각 처리 절차에 대응하는 특성피크를 관찰하였고, 이를 통하여 각 단계의 실험이 성공적으로 수행되었음을 확인할 수 있었다. 표면저항을 측정한 결과, $2{\times}10^3\;ohm/sq$으로 절연성인 폴리우레탄 필름에 전도도가 부여됨을 알 수 있었고, PU-g-AAc/PANI 필름에서 폴리아닐린에 대한 도판트 역할을 하는 아크릴산의 양이 증가할수록 표면저항은 감소함을 알 수 있었다.

탄소나노튜브의 함량에 따른 항공기용 탄소나노튜브/폴리우레탄 탑코트의 접착 및 전기적 특성 평가 (Evaluation of Adhesion and Electrical Properties of CNT/PU Topcoat with Different CNT Weight Fraction for Aircraft)

  • 김종현;신평수;김소연;박종만
    • Composites Research
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    • 제33권1호
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    • pp.1-6
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    • 2020
  • 탄소나노튜브의 함량에 따라 폴리우레탄 타입 탑코트의 분산도 및 전기저항의 평가를 통해 탄소나노튜브의 최적함량을 찾기 위한 연구를 진행하였다. 초음파 분산을 통하여 탄소나노튜브를 폴리우레탄 탑코트 내에 분산하였고, 중력식 스프레이건을 이용하여 탄소섬유/에폭시 복합재 표면에 탄소나노튜브/폴리우레탄 탑코트의 코팅을 진행하였다. 4가지 용매를 이용하여 탄소섬유복합재와 탄소나노튜브/폴리우레탄 탑코트의 정적접촉각을 측정하였고, 이를 이용하여 접착일을 계산하였다. 탄소나노튜브/폴리우레탄 탑코트의 표면저항을 측정하였고 이를 통하여 탄소나노튜브의 최적 함량조건을 파악하였다. ASTM D3359를 기반으로 크로스 컷 시험을 진행하였고 이를 통하여 탄소나노튜브/폴리우레탄 탑코트의 부착특성을 평가하였다. 실험결과를 통해 탄소나노튜브의 최적 조건을 파악하였다.

The Effect of Fluid Shear Stress on Endothelial Cell Adhesiveness to Modified Polyurethane Surfaces

  • Gilson Khang;Lee, Sang-Jin;Lee, Young-Moo;Lee, Jin-Ho;Lee, Hai-Bang q
    • Macromolecular Research
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    • 제8권4호
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    • pp.179-185
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    • 2000
  • Generally vascular grafts with a relatively large inner diameter (> 5 mm) have been successfully employed for replacement in the human body. However, the use of small diameter grafts is limited, because these grafts rapidly occlude due to the thrombosis. The ideal blood-contacting surface of a prosthesis would be an endothelial cell (EC) lining, because the confluent monolayer of healthy ECs that culture natural blood vessels represents the ideal nonthrombogenic surface. For vascular graft application, the stable EC adhesion on surface under How conditions is very important. In this study, the adhesive strength of ECs attached on polymer surfaces coated with collagen type IV (Col IV), fibronectin (Fn), laminin (Ln), and treated with corona was investigated onto polyurethane (PU) films. The EC-attached PU surfaces were mounted on parallel-plate flow chambers in a How system prepared for cell adhesiveness test. Three different shear stresses (100, 150, and 200 dyne/㎠) were applied to the How chambers and each shear stress was maintained for 120 min to investigate the effect of shear stress and surface treatment condition on the EC adhesion strength. It was observed that the EC adhesion strength on the surface-modified PU films was in the order of Ln≡Fn > Col IV > corona 》 control. More than 70% of the adhered cells were remained on surface-modified PU surface after applying the shear stress,200 dyne/㎠ for 2 hrs, whereas the cells were completely detached on the control PU surface within 10 min after applying the same shear stress. It seems that the type of adsorbed proteins and hydrophilicitv onto the PU surfaces play very important roles for cell adhesion strength.

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