• Journal of the Korean Chemical Society
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• v.38 no.9
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• pp.682-686
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• 1994

New synthetic method of aminophosphonic acids by the amination of organoboranes containing phosphorus was developed. Thus, the hydroboration of diethyl 2-propenylphosphonate, diethyl 2-methyl-2-propenyl-phosphonate, diethyl 3-butenylphosphonate with borane-THF, followed by amination of the resulting organoboranes with hydroxylamine-O-sulfonic acid gave diethyl 3-aminopropylphosphonate, diethyl 3-amino-2-methyl-2-propylphosphonate and diethyl 4-aminobutylphosphonate, respectively. 3-Aminopropylphosphonic acid and 4-aminobutylphosphonic, acid were obtained by the hydrolysis of the corresponding esters, respectively.

• Korean Journal of Food Science and Technology
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• v.44 no.2
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• pp.191-195
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• 2012

Aminated gelatin microparticles were prepared with fucoidan at concentrations ranging from 0.5 to 2.0%. In order to acquire a higher primary amino group content regarding gelatin, gelatin was synthesized by using 1,2-ethylenediamine and free amino groups of aminated gelatin microsphere sample uncrosslinked or crosslinked with fucoidan have been determined by using trinitrobenzensulfonic acid (TNBS) methods. At the smallest fucoidan concentration, the free amino group content of the aminated gelatin microparticles was highest and decreased when fucoidan concentrations were increased. Furthermore, as concentration of fucoidan increased, the release from microparticles decreased. The $in$ $vitro$ gastric mucoadhesion of microparticles were evaluated by using fluorescent-labeled microparticles in an isolated and perfused mouse stomach. The gastric mucoadhesion of the aminated gelatin microparticles was significantly improved compared with that of gelatin microparticles.

• Polymer(Korea)
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• v.26 no.2
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• pp.160-167
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• 2002

We synthesized HPP-g-GMA copolymer using pre-irradiation method by E-beam and aminated HPP-g-GMA using amination reaction. Degree of grafting increased with increasing GMA monomer concentration and showed the maximum value of 130% at 1.46 M of GMA. The degree of amination increased with increasing the degree of grafting. When the degree of grafting was 100%, degree of amination showed the maximum value of 37.4%. The ion exchange capacity of aminated HPP-g-GMA was about 3.78 meq/g, and it showed remarkable adsorption ability of hollow fiber ion exchanger. Through the BET analysis, the surface area of aminated HPP-g-GMA was 54.83 $\m^2/g$ and the mean pore size was $26\AA$. These showed the decrease of surface area and the slight increase of the mean pore size. SEM results show that the thickness of fiber increased after the step of reaction and there pore blocking phenomena was not observed. The aminated HPP-g-GMA was synthesized successfully and found to be suitable for the adsorption and separation of anion.

• The tire
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• s.65
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• pp.10-17
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• 1976

아민계열화방지제(이하 아민이라고 한다)를 첨가한 천연고무 순고무가유물에 대해서 고온으로 반복대신장피로를 주어서 응력변화, 피로수명에 주는 열화방지제의 영향을 조사하였다. 아민첨가시료에 대해서 고온으로 반복 신장피로를 가하면 무첨가시료와 동양, 화학응력 연화가 출현했다. 아민첨가시료의 화학응력연화의 임계온도는 NR-DPG로 110℃, NR-MBTS로 110℃, NR-TT로 130℃이며 가교구조의 내열성에 일치하며 무첨가시료의 임계온도보다도 10~30℃높아졌다. 아민첨가시료의 반복신장피로수명은 60℃로 극대화 되어 (NR-DCP만이 40℃이었으나) 무첨가시료의 피로수명은 40℃에서 극대화됐다. 전보에서 보고한 피로수명과 변형률과의 관계식(F=A(εb-ε)n)은 100℃에서 아민첨가시료에 대해서만이 성립하고 무첨가시료에 대해선 성립되지 않았다. 이들의 결과는 아민을 고무에 첨가함으로써 고무의 열산화반응이 억제되었음에 원인하고 있다고 생각된다.

• Membrane Journal
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• v.25 no.3
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• pp.248-255
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• 2015

Aminated polyetherimide membrane synthesized in the laboratory according to amine ratio was used for measurement of gas permeability, diffusivity, and solubility about carbon dioxide, nitrogen, methane, oxygen, and sulfur dioxide with Time-lag method at room temperature. Generally, gas permeability is totally decreased because the more amination rate reacted to the main chain of amine groups, the more intermolecular space became narrow. However, gas permeability of sulfur dioxide was increased due to combination of sulfur dioxide and amine groups have acid and base properties respectively. Diffusivity and solubility of dry gas are totally decreased excluding sulfur dioxide as increasing amination rate. In case of sulfur dioxide, however, diffusivity as well as solubility was increased as increasing amination rate. Selectivity of carbon dioxide/nitrogen showed 60 when amination rate was 3. In case of humid gas, gas permeability of carbon dioxide was 70 barrer when relative humidity showed 100, and selectivity with nitrogen approximately showed 18.

• Polymer(Korea)
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• v.25 no.3
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• pp.311-317
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• 2001

In this study, we synthesized bead-type GMA-DVB copolymer using glycidylmethacrylate (GMA) with high reactivity and hydrophilicity. Macrorecticular anion exchanger containing the trimethylammonium group were then prepared by amination with trimethylammonium chloride. We observed that the size of $NO_3^-$ is smaller than that of $SO_4^{2-}$ which disturb $NO_3^-$ removal in most of coexistent anions in ground water. Thus we investigated selective affinity for $NO_3^-$ and properties of individual ion exchangers with various DVB content. For each resins, we confirmed formation of copolymer by FT-IR spectrometer and investigated ion exchange capacity, swelling ratio, the amination yield and the effect with degree of crosslinking on adsorbability for nitrate. When amount of DVB is 4 wt%, amination yield, ion exchange capacity and swelling ratio was 384.3%, 3.25 meq/g and 77.1%, respectively. In these result, it can found that synthetic optimal condition is 4 wt% DVB content for monomer.

• Polymer(Korea)
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• v.30 no.3
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• pp.217-223
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• 2006

Ion exchange fibers, high functionalized onto hybrid polyolefine fiber's surface, were synthesized by $\gamma-ray$ mutual radiation. Degree of grafting (DG) of copolymer increased with increasing GMA monomer concentration and the maximum rate of DG was 355% at 50 GMA. The graft reaction occurred in polar solvent and DG was 190% maximum value in $1.0\times10^{-3}$ Mohr's salt and 0.1 M sulfuric acid, respectively. The amination for graft copolymers varied depending on amine reagents, and the reactivity for copolymers was highest for methylamine, and that of triethylamine lowest. It was shown that water uptake and ion exchange capacities increased with increase in the rate of amination while surface area decreased rapidly as proceeding for graft reaction and amination.

• Polymer(Korea)
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• v.26 no.4
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• pp.516-522
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• 2002

The ion exchange characteristic of quaternary ammonium as functional group containing aminated acrylic fibrous ion exchanger were studied for the adsorption of linear alkylbenzene sulfonate (LAS) in a continuous ion exchange process. The adsorption capacities of aminated acrylic for LAS as the adsorption temperature were increased with increasing adsorption temperature and were equilibrated at $40^{\circ}C$. The maximum adsorption capacities as column packing ratio (L/D) were obtained at L/D>2. The adsorption capacity for LAS was increased with increasing pH and the maximum adsorption capacity as pH was obtained at pH 7. The effects of temperature and pH were similar to those of flow rate and concentration of LAS tin the breakthrough curves, the breakthrough time and slope of breakthrough corves decreased with increasing flow rate and concentration of LAS in adsorption process.

• Polymer(Korea)
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• v.25 no.4
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• pp.451-459
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• 2001

Fabric ion-exchanger, aminated PP-g-styrene was synthesized with styrene monomer onto PP staple fiber by pre-irradiational grafting with E-beam and subsequent chloromethylation and amination. Degree of grafting was increased with increasing the styrene monomer concentration and the highest degree of grafting was obtained 118% at a monomer concentration of 80% styrene. Optimum condition of Mohr's salt and sulphuric acid were 1.0 ${\times}\;10^{-3}$ M and 0.1 M. Amount of amination was increased with increasing degree of grafting. Swelling ratio of aminated PP-g styrene was higher than that of trunk polymer. Ion-exchange capacity was 6.7 meq/g, which was three times greater than commercial ion-exchanger. Optimum condition of baron ion adsorption was pH 4 and amount of adsorption were increased with increasing the amount of amination.

• Membrane Journal
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• v.25 no.5
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• pp.447-455
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• 2015

In this study, Polysulfone (PSf) and polyetherimide (PEI) as the anion exchange polymers were aminated in the different ratio whereas the polyether ether ketone (PEEK) as the cation exchange polymer was sulfonated. The bipolar membranes of SPEEK (sulfonated PEEK)/APSf (aminated PSf) and SPEEK/APEI (aminated PEI) were prepared by the double-casting method. The surfaces of bipolar membranes were fluorinated in accordance with the amination ratio and applied to produce the hypochlorite. As the amination increased, the hypochlorite concentration is also increased. Typically, for SPEEK/APSf 3 : 1 membrane, the produced hypochlorite concentration was 61.0 ppm and its durability was 220 min for the non-fluorinated membrane while for the fluorinated membrane, the concentration of 58.6 ppm and its durability lasted 570 min. Also for SPEEK/APEI 3 : 1 membrane, the hypochlorite concentrations of 60.1 ppm and 58.3 ppm for before- and after-fluorination, respectively were observed whereas the durability was remarkably developed from 150 min to 440 min. Therefore, the surface fluorination takes an important role for the development of the membrane durability.