• 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.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.89-90
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• 2022

Arc metal spraying is a widely used method for improving the performance of construction structures such as corrosion resistance and electromagnetic wave shielding. However, when arc metal spraying is applied to a concrete structure, adhesion performance may deteriorate. Therefore, the effect of each surface treatment method on the physical properties between the arc metal spray coating and concrete was reviewed by evaluating the deposition efficiency and adhesion performance according to the arc metal spray surface treatment method (surface reinforcing agent, roughening agent, and sealing agent). As a result, it is suggested as an optimal surface treatment condition to induce non-interface failure by using a roughening agent and to improve the properties of concrete and metal coatings by applying a surface reinforcing agent and sealing agent.

• 폴리머
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• 제24권4호
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• pp.513-519
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• 2000

핫 멜트 접착제의 점착제로 사용되고 있는 석유수지를 비 결정성 올레핀 수지에 블렌딩하였을 때 점착제가 비 결정성 올레핀 수지의 열적 특성 및 결정화거동에 미치는 영향과 이에 따른 접착특성 변화에 대하여 살펴보았다. 점착제로 사용된 석유수지는 비 결정성 올레핀 수지의 용융온도를 저하시키고 이러한 현상은 에틸렌 함량이 상대적으로 많은 비 결정성 올레핀 수지에서 두드러지며, aromatic 수지인 $C_{9}$ 석유수지보다는 aliphatic 수지인 $C_{5}$ 석유수지를 사용할 때 그 감소의 폭이 큼을 알 수 있었다. 아울러 석유수지의 블렌딩에 의하여, 특히 aromatic 수지인 $C_{9}$을 첨가하였을 경우, 비 결정성 수지의 에틸렌 함량이 적을수록 결정화도가 현저히 감소함을 확인할 수 있었다. 점착제의 조성비가 50% 정도에서 가장 우수한 접착력을 확인할 수 있었으며, 에틸렌 함량에 관계없이 $C_{5}$ 석유수지의 첨가시 접착력이 현저히 향상됨을 알 수 있었다. 에틸렌 함량이 적은 비결정성 올레핀/석유수지 핫 멜트에서는 점착제로 인하여 발현된 결정화도 감소에 의하여 접착특성이 증가됨을 알 수 있었다.

• 한국염색가공학회지
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• 제30권2호
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• pp.107-116
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• 2018

Simplification of the manufacturing process in shoe making is essential to improve productivity and reduce production costs. To improve the adhesion of EVA foam used as a midsole, EVA/itaconated EPDM(EPDM-g-IA)(80/20wt%) blend was prepared using Torque Rheometer-Plasti-Corder, and 1,6-hexamethylenediamine/crosslinking agent/foaming agent/additive were mixed, followed by amidation reaction and foaming to prepare EVA/EPDM-g-IA foam for shoe midsole. In this study, we investigate the effect of the content of 1,6-hexamethylenediamine(0, 0.5, 1.0, 2.0, 3.0) on the mechanical properties, water-contact angle and adhesion of EVA/itaconated EPDM foam. As the content of 1,6-hexamethylenediamine increased, mechanical properties such as tensile strength, tear strength, tensile elastic modulus, hardness, and water-contact angle were lowered, but elongation at break and compression set(%) were increased. Both normal type and non-UV type adhesive strength increased with increasing diamine content. In particular, it was found that the adhesion strength of the non-UV type adhesion increased sharply with increasing diamine content. As a result, an adherend rupture occurs in a foam sample having a content of 1,6-hexamethylenediamine of 3phr. From this, it can be seen that the EVA/itaconated EPDM foam for shoe midsoles, which can be used for non-UV adhesion without primer and UV treatments, have been developed.

• 한국축산식품학회지
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• 제26권4호
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• pp.497-502
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• 2006

한국인 유아의 분변에서 분리한 10종의 분리균주를 포함하여 총 16종의 bifidobacteria에 대한 Caco-2 세포에 대한 부착성과 세포 표면 소수성을 측정하였다. 부착성과 세포 표면소수성 모두 균주에 따라 상이한 결과를 나타내었으며 균종에 따른 경향은 관찰되지 않았다. 실험 균주 중에서 B. longum D6, B. longum H4, B. breve Ml, B. thermophilum ATCC 25525, B. suis ATCC 27533, B. animalis subsp. lactis BB12 균주가 세포 표면 소수성이 높게 나타났으며, Caco-2 세포에 대한 부착성은 B. bifidum B3, B. longum D6, B. longum H4, B. thermophilum ATCC 25525, B. suis ATCC 27533, B. animalis subsp. lactis BB12, B. longum 2 등이 우수하였다. 또한 Caco-2세포에 200개 이상이 부착되는 실험 균주는 모두 60% 이상의 세포 표면 소수성을 나타내고 있으므로, 부착성이 우수한 균주 선발 시 분리 균주의 세포 표면 소수성을 측정하여 선발하는 것이 가능하다고 판단되었다.

• Korea-Australia Rheology Journal
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• 제13권2호
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• pp.83-87
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• 2001

The morphology and mechanical properties of the blends of a syndiotactic polystyrene (SPS) and poly-styrene-block-poly(ethylene-co-butylene)-block-polystyrene copolymers (SEBS) with various polystyrene block contents are studied. Mechanical properties, especially elongation at break and impact strength (IS), of the blend depend upon the morphology and interfacial adhesion, which in rum are affected by the viscosity ratio of constituent components and the styrene block content in SEBS. The IS of a blend was affected by the combined effect of rubber content and the interfacial adhesion. A maximum IS was found for a blend with the weight fraction of the PS block in an SEBS of 0.18. The IS of blends with smaller weight fractions of the PS block exhibited lower due to poor interfacial adhesion between SPS/SEBS in spite of a larger amount of rubber block. On the other hand, the IS of blends with larger weight fraction of the PS block becomes smaller due to lower amounts of rubber block in spite of better interfacial adhesion.

• 한국재료학회지
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• 제26권10호
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• pp.542-548
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• 2016

The influence of NiCrAlY bond coating on the adhesion properties of an Fe thermal coating sprayed on an Al substrate was investigated. By applying a bond coat, an adhesion strength of 21MPa was obtained, which was higher than the 15.5MPa strength of the coating without the bond coat. Formation of cracks at the interface of the bond coat and the Al substrate was suppressed by applying the bond coat. Microstructural analysis of the coating interface using EBSD and TEM indicated that the dominant bonding mechanism was mechanical interlocking. Mechanical interlocking without crack defects in the coating interface may improve the adhesion strength of the coating. In conclusion, the use of an NiCrAlY bond coat is an effective method of improving the adhesion properties of thermal sprayed Fe coatings on Al substrates.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
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• pp.110-110
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• 1999

Polyvinylidenefluoride (PVDF) is most used in piezoelectric polymer industry. Electrode effect on the electrical properties of PVDF has been investigated. al has been used due to fair adhesion for PVDF. Work function of metal plays an important role on the electrical properties of ferroelectrics for top and /or bottom electrode. However, Al has much lower work function than Pt or Au and so leakage current of Al/PVDF/Al may be large. Pt or Au has not been used for electrode of PVDF system due to poor adhesion. PVDF irradiated by Ar+ ion beam with O2 environment takes good adhesion to inert metal. Contact angle of PVDF to triple distilled water was reduced from 75$^{\circ}$ to 31$^{\circ}$ at 1$\times$1015 Ar+/cm2. Working pressure was 2.3$\times$10-4 Torr and base pressure was 5$\times$10-6 Torr. Pt was deposited by ion beam sputtering and thickness of pt film was about 1000$\AA$. in previous study, enhancing adhesion of Pt on PVDF was shown. in this study, effect of electrode on PVDF will be represented.

• 한국염색가공학회지
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• 제11권4호
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• pp.50-56
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• 1999

The adhesive properties of polyester cord in rubber matrix were investigated according to the surface modification. The polyester cord was oxidized in sodium hypochlorite solution, and graft-polymerized with acrylic acid under the irradiation with ultraviolet light, and then coated with resorcinol-formaldehyde latex (RFL). The modified surface was checked with scanning electron microscope. The adhesive properties were measured by the full-Out method, and evaluated with regard to the energy of adhesion and the maximum load. The polyester was not oxidized in sodium hypochlorite solution, so the surface was not able to etch to produce the coarse topology. As the concentration of acrylic acid and the reaction time were increased, the graft yields were also increased. It was considered that the acrylic acid would swell the polyester and diffuse easily to the inner side of substrate. The adhesive properties of polyeser to rubber matrix were affected by the surface condition. Namely, the maximum load was almost same, but the energy of adhesion was rather higher In the polyester grafted with acrylic acid than in control one. We concluded that the flexible aliphatic chains of polyacrylic acid situated in the interface of cord and rubber matrix were distributed well the stress and strain all over the filler resulting the high energy of adhesion.

• 접착 및 계면
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• 제16권2호
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• pp.63-68
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• 2015

본 연구에서는 carboxylic acid group이 도입된 열가소성 폴리우레탄(thermoplastic polyurethane, TPU)과 동적 가교형 TPV (thermoplastic vulcanizate)계 열가소성 탄성체를 제조하였으며, 탄성체 분자구조 내 acid group의 도입에 따른 기계적 물성, 그립성, 데브리스, 접촉각 및 접착특성 변화에 대해서 평가하였다. 연구결과 acid group이 도입된 경우 수소결합의 증가로 인해 기계적 물성과 wet slip 특성이 향상되었으며, 카르복시산에 의해 표면 극성이 증가되었기 때문에 접착력 또한 향상되었다. 그리고 acid group이 도입된 TPU를 사용해서 TPV를 제조한 결과 TPU 자체에 비해 감성특성과 데브리스(debris) 특성이 향상되었다.