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Poly(MAn-co-VAc)를 이용한 면섬유의 반응성 염색에 대한 방염효과
윤기종,김규오,서영삼,Yoon, Kee-Jong,Kim, Kyu-Oh,Seo, Young-Sam 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.3
Poly(maleic anhydride-co-vinyl acetate) copolymers were prepared by copolymerization in toluene, using AIBN as initiator. Cotton knit fabric was treated with poly(MAn-co-VAc) and the changes in the dye resist property with molecular weight, concentration and curing time was studied. The dye resist ability was evaluated by colorimetric analysis. Higher molecular weight copolymers were more efficient in blocking the dye. This appears to be due to the preferential reaction of the copolymer on the surface of cotton fabric, where the longer chains are more efficient in blocking the penetration of the dye into the fiber, due to the hydrophobic nature of the vinyl acetate comonomer. The blocking effect increased with concentration of the blocking agent padding bath, but yellowing occurred at concentrations above 30 wt%. Although dye resist effect was best when curing time of poly(MAn-co-VAc) was 2 min 30 see, the cotton fabric turned yellowish. Therefore, curing time should be less than 2 min 15 sec in order to avoid yellowing effect and obtain good dye resist property.
폴리부틸렌 나프탈레이트를 하드 세그먼트로 하는 폴리(에테르-에스터) 공중합체의 합성
윤기종,서영삼,Yoon, Kee Jong,Seo, Young Sam 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.1
Melting temperature of the poly(ether-ester) copolymers are generally around $200^{\circ}C$ and are suitable for moisture barrier in active sportswear, but higher melting temperatures are required for them to be used in personal protective clothing. In an attempt to obtain higher melting poly(ether-ester) copolymers, copolymerization of bishydroxybutyl naphthalate and poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol) tri-block copolymers (EPE) was carried out to obtain poly(butylene 2,6-naphthalate)/EPE copolymers with poly(butylene 2,6-naphthalate) (PBN) as hard segments and EPE as soft segments. PBN/EPE copolymers containing different amounts of EPE (0, 5, 10, 20 and 30 wt%) of different molecular weights (1100, 2000, 2800 and 5800) were prepared. Composition analysis, solution viscosity and density measurements were made. The composition of copolymers determined from $^1H$-NMR spectra were similar to feed composition.
Spacer 사용에 따른 방화복의 multi layer thermal barrier의 열적 성질 및 쾌적성에 미치는 영향
윤기종,홍경아,Yoon, Kee-Jong,Hong, Kyoung-A 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.6
For firefighter protective clothing, the thermal protective performance is of primary importance but its comfort should also be considered. In this aspect, the effects of the thermal barrier construction on the level of thermal protection were investigated. Various thermal barriers were prepared to maximize the thermal protection and comfort properties. Multilayer thermal barriers prepared from meta-aramid needle punched nonwovens of different thickness and number of layers with and without spacers were compared. The differences in their thermal insulation and comfort properties were evaluated using flame testing, bending length measurements and water vapor permeability. For thermal barriers, multi-layer construction with spacers exhibited higher thermal protective performance and lower bending rigidity.
Poly(butylene 2,6-naphthalenedicarboxylate)/Poly(propylene glycol) 공중합체의 합성과 투습도 평가
박우리,윤기종,Park, Woo-Lee,Yoon, Kee-Jong 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.3
Segmented block poly(ether-ester) containing poly(propylene glycol), PPG, soft segments and Poly(butylene 2,6-naphthalenedicarboxylate), PBN, hard segments were prepared by transesterification and polycondensation. Synthesis of the PBN/PPG copolymer were confirmed by $^1H$-NMR. Thermal behavior was measured by DSC and TGA. Permeability measurements of PBN/PPG copolymer films were made using an upright cup method. Although $T_m\;and\;T_c$ of PBN/PPG copolymer decreased slightly with increase in PPG composition in the PBN/PPG copolymer, their melting points are in excess of $200^{\circ}C$ which is required for firefighter's protective clothing. The moisture vapor transmission rate(MVTR) increased with addition in the amount of PPG and rising of temperature significantly. But the reduction in density due to the introduction of PPG instead of poly(ethylene glycol), PEG, as the soft segment did not influence MVTR, and the MVTR values were lower compared with commercial breathable films.
N-isopropylacrylamide의 그라프트에 의한 아크릴 섬유의 표면개질
우종형,서영삼,윤기종,Woo, Jong-Hyung,Seo, Young-Sam,Yoon, Kee-Jong 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.3
Acrylic fibers were graft-copolymerized with N-isopropylacrylamide in aqueous media, using a radical initiator, benzoyl peroxide. The grafting reactions were carried out within the $75{\sim}85^{\circ}C$ temperature range, and the effects of initiator, monomer concentration, and the amount of fiber on the graft yield were also investigated. The maximum graft yield of 88.6% was reached when grafting was carried out at the benzoyl peroxide concentration of $2{\times}10^{-3}mol/l$, the N-isopropylacrylamide concentration of 0.5 mol/l, for 8 hours at $80^{\circ}C$. The grafted fibers were characterized by nuclear magnetic resonance spectroscopy, infrared spectroscopy, scanning electron microscopy, and thermogravimetry. Scanning electron micrographs showed that homogeneous fiber surface changed to shell-like heterogeneous appearance with increase in degree of grafting. Fiber diameter also increased with graft yield. Moreover, moisture regain and water absorptivity of the grafted fiber were highly enhanced by grafting. The results on the response of grafted acrylic fibers to pH and heat are presented.
국·내외 화학물질 방호용 장화에 대한 화학투과저항성 비교
박평규(Pyoung-Kyu Park),김로(Lu Jin),김해형(Hae-Hyoung Kim),김영수(Young-Soo Kim),윤병선(Byung-Seon Yoon),윤기종(Kee-Jong Yoon),박용환(Yong-Hwan Park) 한국위험물학회 2016 한국위험물학회지 Vol.4 No.2
The resistance of chemical permeation of various internal/external chemical protective boots was assessed and compared in accordance with ASTM F 739 and EN 374. Moreover, the hardness of chemical protective boots was investigated before and after chemical permeation test. The results showed that the sample #1 exhibited the highest chemical permeation resistance among the tested boots, but the domestic product, showed the lowest resistance. A nonlinear relationship between the thickness and breakthrough time of chemical protective boots was found. The sample #5 showed the highest increase in hardness after chemical permeation testing. In addition, the hardness of all boots increased a little after chemical permeation test.