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Mono-sodium glycerate에 의한 Poly(ethylene Terephthalate) Film의 분해반응에 관한 연구
許萬宇 慶一大學校 1990 論文集 Vol.6 No.1
This study was carried out with the view of fundamental investigating to improve the tactile and the hygroscopicity of Poly(ethylene Terephthalate) (PET) fibers. Mono-sodium glycerate in glcerine (MSGR-GR) solution was prepared and PET films were treated with it. The following conclusions were obtained. When PET films were decomposed in MSGR-GR solution, decomposition rate constant showed an exponential relationship with treating temperature; activation energy was 19.25Kcal/mol, activation enthalpy was 18.74~18.66Kcal/mol and activation entropy was -43.40~-43.59 e.u. On the basis of the results obtained above it was found that the decomposition reaction proceeded through ester interchange reacion.
Mono-sodium Ethylene Glycolate에 의한 Poly(ethylene Terephthalate)織物의 分解速度에 관한 硏究
許萬宇,金映鎭,曺煥 嶺南大學校 工業技術硏究所 1987 연구보고 Vol.15 No.2
In order to investigate the degradation behavior of poly(ethylene terephthalate) (PET) fabrics, mono-sodium ethylene glycolate(MSEG)-ethylene glycol(EG) solutions were prepared and PET fabrics were treated in the salutions. The dissolution rate constant and apparent activation energy of the PET fabrics were calculated by Kuriyama's equation. From the results of FT-ir analysis, dye absorption for rate of weight loss and tensile strength the following observations were made ; 1. PET fabrics decreased their weight in MSEG-EG solution, but the degradation behavior is not similar to hydrolyzing in NaOH-H₂O solution. 2. The dissolution rate constant showed an exponential relationship to treating temperature and a linear relationship to the concentration of MSEG-EG solution. 3. Apparent activation energy of dissolution was 15.7∼16.18 kcal/mol and decreased slightly with increasing concentration of MSEG-EG solution but no relationship was noted between the concentration of MSEG-EG solution and apparent activation energy. 4. PET fabrics showed that dye absorption increased with decreasing their weight until 60% of weight loss.
Mono-sodium Propyleneglycolate에 의한 PET 신합섬직물의 분해에 관한 연구
許萬宇,尹鍾浩 慶一大學校 1993 論文集 Vol.9 No.1
Polyester (PET) microfiber was treated by mono-sodium propylenglycolate at 100, 110, 120 and 140℃ . Kinetic study has shown that the mono-sodium propyleneglycolate decomposes PET fibers through ester interchange reaction and the examined temperature dependent reaction rate constant of the reaction follows Arrehenius type pattern.The activation energy obtained by fitting the rate constants of the reaction at 110, 110, 120 and 140℃ to Arrehenius equation was found to be 16.42kcal/mol.
몇 종류의 Sodium Alkoxide 에 의한 PET film 의 分解速度에 관한 硏究
許萬宇,曺煥,金三洙 영남대학교 공업기술연구소 1989 연구보고 Vol.17 No.1
In order to investigate the degradation behavior of poly(ethylene terephthalate) (PET) films,several sodium alkoxide solutions were prepared and PET films were treated in the solutions. The dissolution rate constant and apparent activation energy were calculated by using Hashimoto's equation. From the results of FT-IR and proton-NMR analysis, the following observations were made; 1. The weight of PET film was decreased by exchanging its ester with sodium alkoxide. 2. The dissolution rate constant showed an exponential relationship with treating temperature. 3. The dissolution rate constant of PET films treated with sodium alkoxide was observed in the descending order of sodium ethoxide, sodium n-propoxide,sodium n-propoxide and sodium methoxide. 4. Apparent activation energy of dissolution was 6.00~13.85kcal/mol and was decreased with was increasing concentration of sodium alkoxide and which was observed in the descending order of sodium methoxide, sodium n-butoxide, sodium n-propoxide and sodium ethoxide.
환원세정 조건이 Polyester 인조 Suede 섬유의 세탁견뢰도 특성에 미치는 영향
허만우 경일대학교 산업기술연구소 1999 産業技術硏究所 論文集 Vol.6 No.-
This study was investigated the washing fastness of polyester suede fabric after dyeing with 2 different disperse dyes. The results were as followings ; The washing fastness of polyester dyed fabric is greater improved in reduction cleaning with N₂gas replacement than that of without N₂gas reduction cleaning. It is assumed that the use of N₂gas replacement during reduction cleaning gives effective removal of unfixed dye on the fiber surface. The most important factors affecting the washing fastness of polyester suede fabric were found to be the reduction cleaning method and the chemical structure of disperse dye. In this study, the washing fastness of azo type disperse dye showed higher grade than anthraquinone type disperse dye. It was also obtained that the heat treatment of dyed fabric decreased the washing fastness.
배정숙,허만우 대한가정학회 2003 Family and Environment Research Vol.41 No.2
This study was discussed the dyeing of wool and nylon fabrics with Chinese Scholar Tree extract. The extracts of Chinese scholar tree was prepared in the condition of heating at 95±5C, for 1 hour and cooling to 40C. And then the extracts of color matter treate with vacuum concentration at 60±2℃, 30mmHg and dried with spray dryer. The dyeing of wool and nylon fabric in this experiment was also employed the mordant dyeing method such as pre-mordant, post-mordant and simultaneous mordant method. The mordanting agents used in this study were as followings ; aluminium potassium potassium sulfate, copper(Ⅱ) acetate monohydrate, chromium potassium sulfate·7H_2O, Tin(Ⅱ) chloride dinydrate, iron(Ⅱ)sulfate·7H_2O. For an evaluation of the dyeing property of the mordanting agents, the pre-mordant method, the repeat dyeing and the fastness of the light, dry cleaning, washing and rubbing measured respectively. From the results of the dye absorption, the optimum dyeing condition of the wool and nylon fabrics with Chinese Scholar Tree extract is at 80C dyeing temperature for 60 minutes. The optimum concentration of mordantion agent is Al, Cr, Sn 1%, Fe, Cu 2% solution. In general, the fastness property of the dyed wool and nylon fabrics had a comparatively high grade.
Tetramethylenediamine에 의한 아크릴纖維의 改質에 관한 硏究
趙龍錫,許萬宇,李光祐 대구효성가톨릭대학교 1989 연구논문집 Vol.39 No.1
To study the possibility of modifcation of acrylic fiber, Cashmilon SF was treated with tetramethylenediamine (TMDA) in toluene without catalyst. And dye adsorption dyed with Benzyl Scarlet BS and tenacity of modified acrylic fiber were measured. Following results were obtained, 1. Cashimilon was reacted with TMDA by condensaton reaction at above 130℃. 2. Acrylic fiber treated with TMDA could be dyed by acidic dyes. 3. The tenacity of acrylic filber treated with TMDA was decreased, so the pilling of the fiber will lessen.
Alkali 감령처리된 Polyethylene Terepthalate Filament 직물에 나타난 흰얼룩의 원인분석
曺煥,李石榮,許萬宇,鄭元圭 嶺南大學校 工業技術硏究所 1983 연구보고 Vol.11 No.1
A study has been undertaken to know the reason why the white specks appear in the polyethylene terephthalate (PET) filament fabrics which were made alkali weight loss treatment in the dyeing and finishing factories of Taegu area. The results are as follows 1. Main component of the white spects in PET filament fabrics is CaCo₃. 2. The CaCO₃was extracted from the washing water and adhered to the PET filament fabrics during the dyeing and finishing process. 3. When PET filament fabrics were treated with hard water, the warp sizing agent did not dissolve to make specks on dyed fabrics. Then the insoluble sizing agent can not be got rid of by alkali treatment. 4. On account of using Na₂CO₃ in washing PET filament fabrics, white spects also can be appeared.