RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      • 좁혀본 항목

      • 좁혀본 항목 보기순서

        • 원문유무
        • 음성지원유무
          • 원문제공처
          • 등재정보
          • 학술지명
          • 주제분류
            • 발행연도
            • 작성언어
            • 저자

          오늘 본 자료

          • 오늘 본 자료가 없습니다.
          더보기
          • 무료
          • 기관 내 무료
          • 유료
          • KCI우수등재

            Draft Zone에서 혼방섬유의 운동상태와 불균제에 대한 연구

            장석윤 한국섬유공학회 1967 한국섬유공학회지 Vol.4 No.1

            纖維長이 틀리는 2種의 纖維를 混紡하되 長纖維는 等長纖維를 擇하고 짧은 纖維는 不等長纖維를 擇하여 混紡할 때 Draft Zone의 ratch를 長纖維便에 맞추어 놓고 不等長纖維만 浮遊纖維가 되게하여 이들이 Draft Zone 內에서의 纖維先端密度를 나타내고 Forster의 Sub-roving의 槪念에 立脚해서 Draft Zone 內에서의 Sub-roving의 平均速度를 計算했고 Draft Zone 內에서 纖維가 이러한 값에 따르지 않을 때 Irregularity가 커지는 것으로 究明했다. 또 Draft Zone 內에서의 纖維相互間의 接觸狀態를 推論하고 이들의 接觸狀態는 餘他條件이 變化하지 않는 限纖維相互間의 摩擦에 依해서만 決定지워 진다고 推論하고 Draft Zone에서 纖維相互間의 接觸狀態는 의 關係가 파괴 될 때 Irregularity는 增加하며 이 關係는 纖維相互間의 마찰에 依해서 變化한다는 것을 推論하고 이것들을 實驗的으로 確認했다.

          • KCI우수등재

            권축섬유의 하중-신장 거동

            양철곤,원천화구 한국섬유공학회 1983 한국섬유공학회지 Vol.20 No.6

            본 연구는 권축섬유의 하중-신장거동에 대한 이론적인 검토와 그 결과를 기존의 방법으로는 측정하기 어려웠던 가는 섬유의 강성도를 외팔보법(cantilever method)에 의하여 측정함으로서 실험적으로 확인하여 보았다. 섬유에 주어지는 권축형태가 다양하지만 유형별로 크게 분류할 때 싸인곡선 형태와 나선형태로 분류될 수 있으므로 두 형태로 구분하여 이론적으로 검토하여 보았으며, 실험에서는 폴리에스테르계섬유(2d, 3d) 싸인곡선 형태에, 잡종양모(56's)는 나선형태에 각각 적용시켜 검토하였다. 실험 결과로부터 권축섬유의 하중-신장에 있어 초기영역에서는 이론곡선과 실험 결과가 대체적으로 잘 부합되고 있음을 확인하였으며, 또한 단섬유의 강성도 측정에서 외팔보법을 이용하면 이형단면 섬유의 정확한 굽힘강성 측정을 손쉽게 할 수 있다는 결과로 이해되었다. The theoretical load-extension behaviour of crimped fiber was studied on the basis of experimental results. The crimped forms of samples were assumed sinusoidal for polyester staple fiber and helical for cross-bred wool fiber, respectively. Flexuarl rigidity of fiber which was one the important factors in load-extension behaviour was measure by canilever system apparatus developed by authors. It is shown that by putting the value of flexural rigdity(G) into derived formulas, the load-extension behaviour of a crimped fiber can be predicted precisely in the initial uncrimping region.

          • KCI우수등재

            케블라 섬유의 화학적 개질(III) - Grafted Kevlar-49 섬유 보강 복합재료의 특성 -

            김한도,김은영 한국섬유공학회 1996 한국섬유공학회지 Vol.33 No.8

            The discontinuous Kevlar fiber-reinforced composites which structure was random-in-plain fiber orientation were prepared by solvent-casting/melt processing method. The interfacial interaction of Kevlar fibers [original Kevlar tribe.(O-K), ac.olein-grafted Kevlar fibers(AL-g-K), methacrylonitrile-grafted Kevlar fiber(MAN-g-K)] with matrix polymers(Phenoxy, PMMA, and SAN) was investigated by dynamic mechanical analysis, thermomechanical analysis and FT-IR spectroscopy. In the dynamic mechanical analysis at 11 Hz, the storage modulus (E') and the decline temperature of were found to increase in the order of MAN-g-K, AL-g-K, and O-K. The tan peak temperature related to glass transition increased in the same order. By ther-momechanical analysis, the trends mentioned above were also seen for T obtained from the first displacement change as a function of temperature. However, the second transition which appeared at higher temperature may be due to interfacial interaction between the fiber and the matrix. Two onset temperatures of TMA displacement change increased also in the same order of MAN-g-K, AL-g-K, and O-K. By FT-IR spectroscopy, it was found that characteristic peaks(phenoxy : C-O-C(240 cm ), PMMA : C=O(1720 cm ), and SAN : C=N(2240 cm )) of composite films shifted to the amide peak (amide I: 1650 cm & amide II : 1540 cm ) of original Kevlar fiber, however, the amide peak of original and grafted Kevlar fibers of composites moved to the characteristic peaks of matrix polymers. From these results, it may be concluded that the interfacial interaction between reinforcement fibers and the matrix polymers (phenoxy, PMMA and SAN) increased in the order of MAN-g-K, AL-g-K and O-K.

          • KCI우수등재
          • KCI등재

            반응성 상용화제를 사용한 Poly(ethylene terephthalate)/Polyamide 6 블렌드로 부터 알로이 섬유의 제조와 구조 및 성능분석(I) -반응성 상용화제가 블렌드의 모폴로지 및 열적 특성에 미치는 영향-

            조징,민병길,Zhou,,Jing,Min,,Byung,Gil 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.2

            The effect of a reactive compatibilizer on the morphology, and thermal and rheological properties of alloy fibers obtained from poly(ethylene terephthalate) (PET)/polyamide 6 (PA6) blends was investigated. An epoxy of bisphenol-A type was selected as the reactive compatibilizer for preparing the polymer alloy fibers by enhancing the compatibility of immiscible blends of PA6 and PET. The PET/PA6/epoxy alloy is expected to be used for preparing practically useful alloy fibers with various advantages such as low cost and high moisture absorption. The PA6/PET/epoxy alloy was successfully prepared via melt compounding by using a twin-screw extruder. The domain size of the poor component decreased enough to result in alloy fibers with reasonable mechanical properties. Further, it was found that the cold crystallization temperature of PA6 in the alloy decreased with increasing epoxy amount, but that of PET increased owing to the significant difference between the crystallization rates of PET and PA6. The $T_g$ values for both polymers in the alloy showed a shift along the direction between them. All the results implied that chemical reactions occurred between epoxy and end groups of PA6 and PET, resulting in improved compatibilization.

          • KCI우수등재

            열, 염산 및 수산화나트륨 처리에 의한 Vectran<sup>®</sup> 섬유의 특성 변화

            백영미,안승국,Baek,,Young,Mee,An,,Seung,Kook 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.5

            In this study, research was conducted on $Vectran^{(R)}$ fibers (highly heat resistant, high strength, lightweight industrial fibers) to determine their suitability for use in the development of hybrid wires and cables. Vectran fibers were heat-treated to various temperatures and treated with HCl and NaOH solutions under various conditions. The effects of heat, HCl, and NaOH treatment on the creep behaviors, mechanical properties, and surface properties of Vectran fibers were examined. X-ray diffraction (XRD) analysis was used to investigate crystallinity changes; while Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) were used to analyze chemical structure changes resulting from degradation. Analysis showed that the mechanical properties and crystallinity of Vectran fibers changed significantly by treatment at temperatures greater than $250^{\circ}C$. Although HCl treatments did not cause significant changes, NaOH treatments resulted in considerable changes in the surface and mechanical properties and crystallinity. FT-IR and XPS analyses indicated that the degradation resulted from the hydrolysis of ester bonds in the fibers.

          • KCI우수등재

            1 방향 유동계에서의 섬유군 거동 특성

            김종성,임정호,허유,Kim,,Jong,S.,Lim,,Jung,Ho,Huh,,You 한국섬유공학회 2017 한국섬유공학회지 Vol.54 No.4

            This study deals with the dynamic characteristics of staples flowing in a one-directional flow field, when external forces exerted on the staples are generated at both the ends of the flow field. Based on a theoretical model describing fiber bundle flow dynamics, we introduced the effect of staple length on model parameters such as the speed variance of individual staples and the kinematic viscosity of staples through a beard diagram. Simulations for investigating the dynamic behaviors of the staple flow variables, namely, the average speed of the staples and the linear density of the staple bundle, were conducted numerically with respect to time and position in the flow field under predetermined conditions. The results indicated that the output linear density of the staple bundle has a periodic change, which could be explained by the dynamic behavior of the staples in the flow field. The dynamic distribution of the average speed of staples has a continuously increasing profile, which changes with time. Thus, the change in speed distribution leads to fluctuations in the linear density of the staple bundle. The acceleration of the staple bundle also fluctuated with time, which got stronger while approaching the exit of the flow field. This indicates that the output staple bundle could be very sensitive to the disturbances occurring near the exit. The fluctuation in output linear density was influenced by the length of the flow field. When the length of the flow field is short (the ratio of the field length to the maximum staple length is approximately 1.1), the fluctuation in linear density has a single peak in the amplitude spectrum. However, when the flow field becomes longer (the ratio of the field length to the maximum staple length is approximately 1.5), the spectrum of the linear density fluctuation shows multiple peaks.

          • KCI우수등재

            Graft견의 물리적 성질

            박연흠 한국섬유공학회 1983 한국섬유공학회지 Vol.20 No.2

            견의 graft 중합에 대해서는 많은 논문들이 발표되었지만, graft중합된 견의 성질에 대하여 자세히 연구한 결과는 그렇게 많지가 않다. 그래서 보고자는 견의 형태로는 직물, 실, 섬유, graft중합 방법으로는 방사선을 이용하는 방법, 개시제를 이용하는 방법, 그리고 사용되는 단량체로서는 styrene, methylmethacrylate(MMA), acrylamide, acryl 산 methyl(MA), acryltks ethyl(EA), acryl 산 buthyl(nㆍBA)등에 의하여 따로따로 분리해서 정리하지 않고, 이들 성분에 대해 물리적 성질을 신도, 흡기율, Young률, stiffness(강연도, 굴곡강성률 포함), 밀도, 주름회복율등으로 항목을 분리해서 보고하고자 한다.(중략)

          • KCI우수등재
          • KCI등재

            폴리프로필렌/폴리(L-락트산) 블렌드 섬유의 제조와 특성 분석

            박경철,김영호,Park,,Kyung,Chul,Kim,,Young,Ho 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.1

            Spin draw yarns (SDY) of polypropylene/poly(L-lactic acid) (PP/PLA) blends with various PLA contents were prepared using a commercial pilot spinning apparatus. Melt-quenched PP/PLA blend films were also prepared by melt-pressed the PP/PLA SDY fibers or PP/PLA blend chips at $200^{\circ}C$ and quenched in ice water. Thermal and mechanical properties of the PP/PLA blend fibers and films were analyzed by using a differential scanning calorimeter (DSC), a scanning electronic microscope (SEM), and a universal testing machine (UTM). Results showed that the melting temperature of the PP in the blends was unaffected by PLA blending and that PP and PLA crystallized independently. Although the melt-crystallization temperature increased slightly with increasing the PLA content in PP/PLA blends, the amount of PP crystal was not affected. PLA existed as beads in PP matrix, indicating that PP/PLA blends are immiscible. Tensile tenacity decreased and extension at break increased with increasing PLA content in PP/PLA SDY fibers.

          맨 위로 스크롤 이동