• 접착 및 계면
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• 제22권3호
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• pp.98-105
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• 2021

본 연구에서는 실란기가 도입된 UV 경화형 우레탄 아크릴레이트를 사용하여 투명성 및 접착성/이형성을 갖춘 silver nanoparticle 전사용 접착 조성물을 제조하였다. Silver nanoparticle이 PET 위에 패터닝되어 있는 Ag/PET 필름과 전사 대상인 PC필름 사이에 제조한 접착 조성물을 도포하고 UV로 광경화한 후, PET를 제거하여 Ag/PC 필름을 제조하였다. 실란기가 도입된 UV 경화형 우레탄 아크릴레이트는 polycaprolactone diol (PCL)과 isophrone diisocyanate (IPDI), 2-hydroxyethyl methacrylate (HEMA), (3-aminopropyl)triethoxysilane (APTES)를 사용하여 합성하였다. APTES의 실란기는 특수 처리된 Ag표면과 반응하여 계면접착력이 개선될 수 있으며, 실란기가 도입된 우레탄 아크릴레이트와 희석제로 투입하는 기능성 아크릴 희석제에 의하여 PC필름과의 접착력을 향상시켰다. 우레탄 아크릴레이트 합성은 FT-IR을 이용하여 분석하였으며, APTES의 몰비와 아크릴 희석제 조성에 따라, 접착 특성과 광학 특성, 전사 특성 등을 비교하였다. 결과적으로, PUA2S1_0.5의 조건으로 제조된 접착 조성물에서 가장 우수한 전사 특성을 확인하였다.

• 한국응용과학기술학회지
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• 제27권4호
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• pp.461-469
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• 2010

Polyurethane adhesive is used in various fields as flexible packaging materials including a food packaging field. Therefore, the purpose of this study is synthesis of polyurethane adhesive which uses aliphatic isocyanate, and compares with aromatic isocyanate. The isocyanates for this test are toluene-2,4-diisocyanate(TDI), hexamethylene diisocyanate(HDI), 4,4-dicyclohexyl ethane diisocyanate($H_{12}MDI$), and isophorone diisocyanate(IPDI). And, the effect of any other diisocyanate are evaluated by several methods as for curing rate test, accelerate weathering test, and peel strength test. The polyurethane adhesive using curing catalyst and HDI has adhesion strength of about 560 g/15 mm between aluminium foil and nylon, about 1,520 g/15 mm between nylon and CPP. Those parameters are similar to polyurethane adhesive with TDI. Also, in case of curing rate, those are similar to TDI type polyurethane adhesive. Moreover, data of ${\Delta}E$ as color variation by QUV tester is equal to 4.12, as 48% against those of TDI type.

• Korean Chemical Engineering Research
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• 제46권1호
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• pp.76-81
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• 2008

아크릴계 점착제를 합성한 후 이관능성 혹은 육관능성 우레탄-아크릴레이트 올리고머를 혼합하여 자외선 경화형 점착제를 제조하였다. 올리고머 종류 및 함량을 변화시켜 그에 따른 접착력 변화와 재박리 특성을 조사하였다. 자외선 경화전에는 올리고머의 함량의 증가에 따라 박리력이 증가하였으나 자외선 경화 후에는 감소하는 경향을 보였다. 저장 탄성률(G')이 낮을수록 박리력은 증가하지만 점착제 내부의 상용성과 손실계수(tan ${\delta}$) 값에 따라 점착제의 박리정도와 접착력에 영향을 주는 것을 확인할 수 있었다.

• 접착 및 계면
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• 제19권4호
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• pp.167-172
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• 2018

본 연구에서는 폴리우레탄 핫멜트 접착제를 합성 후, 유도가열에 감응하는 금속 입자를 첨가하여 유도가열 melt형 접착제를 제조하고, 금속입자의 종류 및 크기, 유도가열 조건에 따른 열적 거동 및 접착특성을 연구하였다. 다양한 금속입자 중에서 iron 및 nickel 적용 시, 유도가열 효율이 가장 우수하였으며, 금속 입자의 크기가 작을수록 유도가열 효율이 향상되었다. 또한 접착제의 유도가열 출력 세기가 높고, 접착제 두께가 얇을수록 접착강도가 향상되었다.

• Journal of the Korean Wood Science and Technology
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• 제17권2호
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• pp.20-25
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• 1989

This study was carried out in order to investigate the treatment effect of PEG soln which is a common dimensional stabilizer to green log. sawing panel etc, on bonding product including plywood widely-used in secondary processing unit. The 30% concentration of aqueous PEG soln. with molecular weight of 400, 1.000 and 4,000 were prepared respectively, and also dipping the veneer in the PEG soln. spreading the PEG soln. on veneer and mixing the PEG soln. in the adhesive were allowed. Then the ratio of PEG impregnation on veneer, the adhesive strength of plywood were epitomized as follows: The ratio of impregnation by PEG 4,000 at dipping condition was highest. while that by PEG 400 at same condition was lowest. However, the effect of PEG molecular weight on the ratio of impregnation at spreading condition did not occur. 2. The adhesive strength was great in the order of 4,000>400>1,000 in molecular weight of PEG at dipping and spreading conditions. In case of mixing the PEG soln. in the adhesive, the adhesive strength was great in the order of 400>1,000>4,000 in molecular weight of PEG. Throughout three treatment conditions, PEG 400 was relatively favourable with about 10kg/$cm^2$ dry strength. 3. The adhesive strength was great 10 the order of spreading >dipping >mixing condition. 4. Although adhesive strength with the 30% concentration of aqueous PEG soln. was decreased by 35% and over, compared to control (non-treatment) adhesive strength, all types of PEG treatment except mixing the PEG soln. in the adhesive exceeded the standard dry strength for common use panel. 7.5kg/$cm^2$. 5. In warm water-proof test, the adhesive strengths by all PEG treatment conditions were less than the standard wet strength, 7.5kg cot, and also delamination of glue line occured mostly in mixing in the PEG soln. in the adhesive condition.

• Elastomers and Composites
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• 제29권3호
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• pp.226-233
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• 1994

The properties of the mixed prepolymer-urethane in the range of 10-40 phr were observed. LBR and LCR have same functional group but different in structure of molecular. The viscosity of mixture depending on content of rubber, adhesive strength, thermal property and compatibility with a diluted solvent are as follows: 1. The viscosity of the mixture was influenced by solubility of the diluent for urethane resin and liquid rubber. 2. Adhesive strength showed the highest value at 30phr rubber, decreased gradually at above 30phr rubber. And LBR revealed better physical property than that of LCR. 3. The most effective factors affecting adhesive strength are molecular structure of rubber, the type of solvent, and volatility. 4. Urethane resin containing LBR showed better compatibility for solvent and faster drying velocity. 5. LBR showed more favorable compatibility and dispersion state than those of LCR by analyzing the results of SEM.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 봄 학술발표회논문집(II)
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• pp.627-632
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• 1998

This study deals with the effect on adhesive strength properties of waterproofing and reinforcing layer and mortar or concrete substrate applicated by epoxy resin anticorrosive and bonding materials. Properties of adhesive strength change condition of concrete substrate, temperature, moisture, curing and cleaning and so on. The purpose of this study is that it makes the estimation value of bond strength of concrete wall and epoxy resin layer when coated epoxy resin as anticorrosive materials for durability performance estimation depend on concrete watertightness, and when penetrated epoxy resin for the reinforcement of concrete used the carbon fiber sheet.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
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• pp.559.2-559
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• 2001

Fanning et al.(1995) suggested that the incorporation of filler particles into a system's adhesive could increase the shear bond strength by improving the mechanical properties. In this study, shear bond strengths of experimental filled adhesives with varying filler levels were tested to determine the optimal filler level. The diametrile tensile strength and thickness of each experimental adhesive were also examined to evaluate if there is a relation between shear bond strength and mechanical properties of adhesive.(omitted)

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.163-164
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• 2020

The purpose of this study was to evaluate the shrinkage properties of a tile reinforced with epoxy resin, which has the advantages of high adhesion and low shrinkage, and causes a hardening reaction by chemical bonding with cement mortar. As a result, since the epoxy resin adhesive suppresses the moisture evaporation of the mortar, the drying shrinkage of the mortar itself is reduced, accordingly, the shrinkage of the tile itself is greatly reduced, and it is thought that it is possible to prevent a decrease in adhesion due to shear stress.

• 대한기계학회논문집A
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• 제32권9호
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• pp.788-795
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• 2008

To understand the tensile behaviors of GFRP at low temperature, three types of specimen have been used in this study. Tensile properties and fracture mechanisms for three orthogonal orientations of plain weave glass fabric reinforced epoxy resin laminate were investigated at temperature range of about -30 to $15^{\circ}C$. The tensile properties of axial and edge type specimen decrease slightly with decreasing temperature to $-20^{\circ}C$. However, at $-30^{\circ}C$ the decreases in the tensile properties increased considerably. Below $-20^{\circ}C$, thickness type specimen showed a marked decreases in the tensile properties. It was obvious that the fracture manner of thickness type specimen was adhesive failure at above $-10^{\circ}C$ and a mixed adhesive and cohesive failure at below $-20^{\circ}C$.