• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.1028-1029
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• 2003

The copolymerization of ethylene and norbornene was carried out with ansa-metallocene and modified methylaluminoxane (MMAO) cocatalyst. The copolymerization behavior was changed with the structure of metallocene catalysts. In addition the catalyst activity was dependent on the structure of MMAO, i.e.. MMAO-4 which contains less i-butyl group compared to MMAO-3A exhibited higher catalyst activity than MMAO-3A. The glass transition temperature and the composition of the produced copolymer were not affected by MMAO type.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.10a
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• pp.35-36
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• 2008

A diblock copolymer($PEO_{45}$-MeDMA) derived from [2-(methacryloyloxy) ethyl] trimethylammonium chloride(MeDMA) was synthesized and applied to the meta-aramid fibers. Meta-aramid fabric was pretreated with $PEO_{45}$-MeDMA and successfully dyed with acid dyes. The dyeability of this fabric was investigated and found to depend on the $PEO_{45}$-MeDMA concentration, pH, and dye concentration. The color fastness properties of the copolymer pretreated dyed fabric was evaluated.

• Journal of Biomedical Engineering Research
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• v.11 no.1
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• pp.47-56
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• 1990

The grafting of butyl methacrylate onto gelatin was investigated by potassium persulfate(KPS) redox system in aqueous solution. The optimum conditions of grafting were observed, and the physical property and the biocolnpatibility of graft copolymer membrane were examined. The gas permeability and the biodegradation by bacteria were decreased with the grafting percentage increased, and tensile strength increased with the grafting percentage increased.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2014.11a
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• pp.15-15
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• 2014

Block Copolymer(BCP) 는 self assembly 현상을 이용하여 다양한 pattern을 형성하는데 용이한 물질로써 이를 이용한 다양한 구조물 제작에 대한 연구가 활발히 진행되고 있다. 본 연구에서는 hoe pattern 모양을 갖는 BCP 패턴을 이용하여 Atomic Layer Deposition(ALD) 및 Reactive Ion Etching(RIE) 공정을 이용한 3차원 quantum tube 구조물을 제작하였다.

• Bulletin of the Korean Chemical Society
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• v.24 no.1
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• pp.123-125
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• 2003

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.80-82
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• 2007

We have developed a series of fluorinated dimethacrylate copolymers. Our work has covered the synthesized derivatives of alignment materials, characterized the pretilt angle and uniformity of liquid crystal alignment layer. The pretilt angle can be tailored by using the fluorinated copolymer. Excellent uniformity was achieved as shown in experimental results.

• Proceedings of the Membrane Society of Korea Conference
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• 2005.11a
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• pp.240-244
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• 2005

• Proceedings of the Membrane Society of Korea Conference
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• 1998.10a
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• pp.73-74
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• 1998

1. Introduction : We have researched to separate water effectively from aqueous pyridine solution. In our previous papers, we have proposed new separation mechanism, in-situ complex, which is different from solution-diffusion and accelerated transport by hydrogen bonding. We have adopted in-situ complex mechanism to membranes containing phosphoric acids as well as acrylic acid and sulfonic acid in copolymer for dehydration of pyridine.

• Bulletin of the Korean Chemical Society
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• v.19 no.11
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• pp.1179-1184
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• 1998

Mesogenic and azo monomers were synthesized and copolymerized to obtain two copolymers composed of methacrylate and itaconate backbone. Glass transition temperatures of the copolymers were found to be slightly higher than ambient temperature. Both the copolymers showed liquid crystalline properties. Trans-cis isomerization in film state was observed under UV-irradiation with a light of 365 nm. Regarding the photochemical phase transition behavior, the transition rate of nematic-to-isotropic state was slightly faster in the methacrylate copolymer during irradiation at 365 nm and the rate of the reverse transition was much faster in itaconate copolymer under thermal effect.

• Applied Chemistry
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• v.15 no.2
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• pp.89-92
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• 2011

We synthesized ethylene-styrene copolymer using pyrazolato-type metallocene catalysts. We observed the effects of ethylene contents on the catalytic activity, yield molecular weight and molecular weight distribution. We could also confirm living polymerization behavior through the changes of the M_n and M_w/M_n according to the yield.