• 한국염색가공학회지
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• 제21권2호
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• pp.40-47
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• 2009

Dimethylaminopropyl methacryamide was photografted onto PET fabrics by continuous UV irradiation under ambient conditions. Several factors affecting the photografting were studied including irradiation energy, monomer and photoinitiator concentrations. ATR and ESCA analysis showed the successful grafting of the monomer onto the PET surface. The grafted PET fabrics showed higher zeta potentials below pH 7 compared with the ungrafted PET. The dyeability of the grafted PET fabrics to two $\alpha$-bromoacrylamide reactive dyes was investigated under various dyeing conditions including dye concentration, pH, dyeing temperature and time. The grafting imparted the reactive dyeability to PET fabrics, which was proportional to the grafted monomer content. The reactive dyeing behavior of the grafted PET fabrics was similar to that of conventional wool fabrics.

• Macromolecular Research
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• 제14권4호
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• pp.424-429
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• 2006

The synthesis of a series of poly(POSS-NBE-b-MTD) copolymers was successfully accomplished, taking advantage of sequential, ring-opening, metathesis block copolymerization using $RuCl_2(=CHPh)(PCy_3)_2$ catalyst. By using cyclopentyl-POSS-norbornene (POSS-NBE) monomer as the first block in the block copolymer, living poly(POSS-NBE) with controlled molecular weight and narrow molecular weight distribution was produced. Then, poly(POSS-NBE-b-MTD) copolymers were successfully prepared, in which sequential monomer addition of methyltetracyclododecene (MTD) to the living poly(POSS-NBE) chain ends was utilized to achieve quantitative crossover efficiency. Characterization by $^1H$ NMR spectroscopy and GPC confirmed the high definition and structural integrity of the poly(PO$S-NBE-b-MTD) copolymers. Thermal properties-and morphologies of the POSS-containing block copolymer nanocomposites were also investigated by using thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and wide-angle X-ray scattering (WAXS).

• 한국염색가공학회지
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• 제20권4호
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• pp.1-7
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• 2008

Methacryloxypropyl trimethoxysilane (MAPTMS), a hybrid organic-inorganic monomer, was photografted onto PET fabric using benzophenone (BP) as a photoinitiator. It was found that a UV energy of 43.2J/$cm^2$ was required to optimally photograft the MAPTMS onto PET fabrics which was applied with an aqueous formulation of 10% MAPTMS, 20% BP and 0.5% N-Methyldiethanol amine (MDEA). The MDEA additive was efficient in reducing atmospheric oxygen inhibition of polymer radicals which eliminated compulsory nitrogen inerting. The surface grafting of PET fabrics was verified by fourier transform infrared spectroscopy (FT-IR) and scanning electron spectroscopy (SEM). The grafted PET fabrics with the hybrid monomer showed higher thermal stability due to the introduced silane component in the monomer as ascertained by higher char content at 800$^{\circ}C$, which increased to 14.5% for the 15.8% grafting compared to 8.2% for the untreated.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 가을 학술발표회 논문집
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• pp.177-178
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• 2003

Many researchers have made efforts to control the stereoregularity in radical polymerization of vinyl monomers because the physical and chemical properties of the polymer are significantly affected by the stereostructure.[1]-[4] In general, monomer design, reaction conditions(e.g. solvent, temperature, and monomer concentration), and additives can alter the stereochemistry of the radical polymerization of acrylic monomer. (omitted)

• Bulletin of the Korean Chemical Society
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• 제33권1호
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• pp.261-269
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• 2012

The cyclic dimers of enkephalin were isolated as minor components during the solution synthesis of the corresponding cyclic monomers. The ratio of cyclic dimer to monomer was approximately 1:4 from the percent of yields. In the receptor binding assay of two cyclic dimmers, ($Tyr_2-C[D-Glu-Phe-gPhe]_2$ 6, $Tyr_2-C[D-Asp-Phe-gPhe-rLeu]_2$ 8), both analogs exhibited the high preference for ${\delta}$ receptor compared to monocyclic counterparts. In the nociceptive activity, both showed about 5 times less potent than the cyclic monomers. The repeated synthesis of 14-membered cyclic analog, Tyr-C[D-Glu-Phe-gPhe-D-rLeu] 14, which was known as having three distinct cis-trans isomers, gave rise to apparently different conformational analog arousing only trans isomer. In the receptor binding assay, it showed tremendously high selectivity toward ${\mu}$ receptor $({\delta}/{\mu}=160)$.

• Macromolecular Research
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• 제15권2호
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• pp.147-153
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• 2007

Hyperbranched polysiloxysilanes (HBPSs), with a variety of terminal functional groups (vinyl, epoxy, carboxyl and hydroxyl), were synthesized by the self-polymerization of an $AB_3$ type monomer of tris(dimethylvinylsiloxy) silane, with subsequent end-functionalizations, such as epoxidation and radical addition reaction, respectively. The ratio of the $\alpha-and$ $\beta-addition$ linkages in the HBPS polymerized by hydrosilylation of the $AB_3$ monomer was found to be approximately 1 to 3. The thermal stability and solubility were affected by the terminal functional groups.

• 한국생활과학회지
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• 제2권1호
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• pp.17-24
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• 1993

Insulin (P)를 면역원으로 이용하여 insulin에 대한 균일한 항체집단의 대량유도 가능성 및 유도된 항체의 특성을 검토하였다. Insulin (P)에 의해 유도된 IgY는 insulin (M)에 의해 유도된 IgY 보다 조금 낮은 친화성을 나타내었으나 큰 차이는 없었다. 두 종류의 면역원에 의해 유도된 IgY는 대부분 insulin (M)을 인식하였으며, 같은 항원 특이성을 나타내었다.

• 한국응용과학기술학회지
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• 제18권4호
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• pp.249-253
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• 2001

A proposed method of determining the composition of mixed micelles in equilibrium with monomer of known composition is described. The systems were sodium ${\alpha}-sulfonated$ dodecanoyl ethyl esther (${\alpha}-SR_{12}Et$) or sodium dodecyl sulfate(SDS)-polyoxyethylene 23 lauryl ether (Brij 35) un water and in 0.1M sodium chloride solution at $25^{\circ}C$. This technique applies the Gibbs-Duhem equation to the mixed micelles, which is treated as a pseudophase. This proposed methodology, which needs only critical micelle concentration data as a function of monomer composition, is applied to an anionic/nonionic surfactant pair. The calculated monomer-micelle equilibrium is found to be very similar to the much-used regular solution for nonideal systems.

• 한국광학회:학술대회논문집
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• 한국광학회 2006년도 하계학술발표회 논문집
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• pp.411-412
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• 2006

Photopolymers have been of considerable due to their easy of processing and high sensitivity. Exposure of photopolymers to optical source produce recroding mark where the light initiates a photoreaction that occurs preferentially in regions of high illumination. The photoreaction typically involves polymerization of an acrylic or epoxy monomer dispersed together with a photoinitiators in a polymeric binder. A number of photopolymerizable materials have been developed to apply them in 3D optical recording such as holographic or 3-dimensional data storage. In this presentation, photopolymers derived from sol-gel matrix and transparent polymer binder are summarized. The effect of monomer composition and plasticizers on optical recording will be discussed based on the monomer transport during the photopolymerization.

• 생명과학회지
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• 제13권3호
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• pp.248-251
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• 2003

갑상선호르몬의 전구체인 thyroglobulin (Tg)이 어떻게 dimerization이 일어나는지를 조사하였다, 변성 혹은 비변성전기영동법으로 관찰한 결과 새롭게 만들어지기 시작한 Tg는 15분에 처음으로 구조적으로 불안정하지만 folded monomer가 관찰되었다. 그 이후에 monomer가 dimer로 바뀌어 결국 30분에 dimer Tg가 만들어지기 시작하여 40분에는 dimer Tg가 관찰되었다. 최종적으로 60분에 완전하게 dimerization된 Tg가 만들어졌다.