• 한국전기전자재료학회논문지
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• 제18권1호
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• pp.68-74
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• 2005

In this work, polymerization conditions of the gel polymer electrolyte (GPE) were studied to obtain better electrochemical performances in a lithium-ion polymer battery. When the polymerization temperature and time of the GPE were 70$^{\circ}C$ and 70 min, respectively, the lithium polymer battery showed excellent a rate capability and cycleability. The TMPETA (trimethylolpropane ethoxylate triacrylate)/TEGDMA (triethylene glycol dimethacrylate)-based cells prepared under optimized polymerization conditions showed excellent rate capability and low-temperature performances: The discharge capacity of cells at 2 Crate showed 92.1 % against 0.2C rate. The cell at -20 $^{\circ}C$ also delivered 82.4 % of the discharge capacity at room temperature.

• 반도체디스플레이기술학회지
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• 제13권1호
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• pp.35-41
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• 2014

UV curable transparent hard coating materials have been developed to improve the mechanical and optical properties of PET substrate. The coating materials were synthesized using various urethane acrylate oligomers, monomers, photo initiators, and leveling agents. The materials were coated on PET substrates and UV cured. The hard coated PET films were shown to have the good scratch resistance and transparency. When the urethane acrylate oligomer with more functional groups was introduced into the coating solution, the mechanical and optical properties were improved. However the higher concentration of 9-functional oligomer resulted in the decrease of workability. The addition of trimethylolpropane ethoxylate$(EO/OH)_9$ triacrylate(TMPETA) to coating solution improved the workability and properties. As a result, the UV cured film from the formulation of urethane acrylate oligomer with 9-functional groups, TMPETA as a monomer, IRACURE 754 as a photo initiator and BYK-340 as a leveling agent showed the best mechanical and optical properties in this study.

• 폴리머
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• 제36권5호
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• pp.668-676
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• 2012

본 연구에서는 실리카 나노입자를 bis[3-(trimethoxysilyl)propyl]amine(BTMA) 실란 커플링제로 표면 개질한 후, 실리카에 도입되는 2차 아미노기인 -NH기와 Michael 부가반응이 가능한 acrylate기를 가지는 trimethylolpropane ethoxylate triacrylate(TMPET)와 3-(acryloyloxy)-2-hydroxypropyl methacrylate(AHM)로 표면 처리를 하여 반응성(meth)acrylate기를 가지는 brush를 도입하는 연구를 수행하였다. 1분자에 Michael 부가반응성이 있는 acrylate기를 3개 갖는 TMPET와 1분자에 반응성이 있는 acrylate기와 반응성이 없는 methacrylate기를 각각 1개씩 갖는 AHM을 사용하여, 처리 몰(mol)수의 변화가 실리카 표면에 도입되는 (meth)acrylate기에 미치는 영향을 Fourier transform infrared spectroscopy(FTIR), elemental analysis(EA) 및 고체 상태 cross-polarization magic angle spinning(CP/MAS) nuclear magnetic resonance spectroscopy(NMR)법을 사용하여 분석하였다. BTMA로 개질된 실리카를 TMPET로 처리하면, 액체상태의 순수 TMPET와 순수 BTMA의 반응과는 달리 TMPET 1분자당 3개씩 결합있는 acrylate기 대부분이 BTMA의 -NH기와 Michael 부가반응이 일어나는 것을 확인하였다. 따라서 BTMA로 처리한 실리카에 Michael 부가반응으로 반응성 (meth)acrylate기를 도입하기 위하여서는 AHM과 같이 Michael 부가반응성이 있는 acrylate기와 Michael 부가반응성이 없는 methacrylate기를 각각 1개씩 가지는 AHM을 사용하는 것이 필요함을 확인하였다.