• Polymer(Korea)
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• v.25 no.2
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• pp.199-207
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• 2001

In the present study the cure behavior of diglycidyl ether of bisphenol-A(DGEBA) using an anhydride-based hardener in the presence of N,N-dimethyl benzyl amine (BDMA) or 1-cyanoethyl-2-ethyl-4-methyl imidazole (2E4MZ-CN) as an accelerator has been monitored and interpreted from the viewpoint of photophysical properties by means of fluorescence spectroscopy. To do this, 1,3-bis-(1-pyrene)propane (BPP) was well incorporated in the epoxy resin system by mechanical blending. The BPP probe, which is very sensitive to conformational change of the molecule influenced by the surrounding medium, successfully formed intramolecular excimer fluorescence. It is susceptible to the micro-viscosity or local viscosity and molecular mobility according to the epoxy cure. The cure behavior was explained with monomer fluorescence intensity ($I_{M}$ ), excimer fluorescence intensity ($I_{E}$ ) and $I_{M}$ /$I_{E}$ ratio as a function of cure time, cure temperature and accelerator. The present work agreed with the previous report on the cure behavior of an epoxy-anhydride system studied using DSC or torsion pendulum method. This study also suggests that the use of fluorescence technique may provide information on cure behavior of a thermosetting resin in a low temperature region, which has not been well interpreted by other analytical methods.

• Proceedings of the Materials Research Society of Korea Conference
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• 1999.11a
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• pp.176-176
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• 1999

• Bulletin of the Korean Chemical Society
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• v.33 no.9
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• pp.3129-3132
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• 2012

• Proceedings of the Optical Society of Korea Conference
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• 1990.02a
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• pp.9-12
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• 1990

본 연구는 KrF 엑사이머 레이저 증폭을 하기 위하여 먼저 능동매질을 N도 사용하여 발전기와 증폭기의 시간적인 동기회에 주 목적을 두었고 안정한 증폭기의 출력을 얻기 위해 방전관 에너지의 5%를 예비전리로 최적화 시켰으며 방전에 사용되는 Spark Gap Switch의 내부 인덕턴스를 고찰하였다.

• Bulletin of the Korean Chemical Society
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• v.35 no.11
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• pp.3369-3372
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• 2014

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.323-327
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• 2006

We present the most recent experimental results on Thin-beam Directional X'tallization (TDX), a rapid excimer-laser-based crystallization method for creating extremely high-quality large-grained polycrystalline silicon films on glass substrates. We will present experimental data obtained with our prototype Gen 2 tool, and discuss the ability to produce different types of poly-Si material.

• Proceedings of the Korean Society of Laser Processing Conference
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• 2003.05a
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• pp.3-8
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• 2003

• Bulletin of the Korean Chemical Society
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• v.31 no.11
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• pp.3445-3447
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• 2010

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2008.04a
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• pp.604-605
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• 2008

• Bulletin of the Korean Chemical Society
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• v.28 no.1
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• pp.151-154
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• 2007