• Macromolecular Research
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• 제13권5호
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• pp.367-372
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• 2005

As a preliminary work for the preparation of nylon 6/c1ay nanocomposites by reactive extrusion, nylon 6/c1ay nanocomposites were prepared by anionic polymerization in a flask. In order to investigate the effect of the intercalation of clay layers, the clay feeding times, such as in pre-mixing where the clay was fed before initiation of polymerization and in after-mixing method where the clay was fed after initiation of polymerization, were changed. The appearance of the WAXD peak of nanocomposites prepared by the pre-mixing method was obvious and the tensile strength was decreased compared with that of pure nylon 6, which indicates that the clay layers were not dispersed and distributed. During the preparation of the nanocomposites by the after-mixing method, disordering of the clay layers was observed with increasing clay addition time and was suspected to result from the rapid polymerization of nylon 6 within the clay layers.

• 한국염색가공학회지
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• 제17권6호
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• pp.11-19
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• 2005

Textile dyeing with vat dyes has the highest color fastness although one and the same dye of all vat dyes cannot always satisfy every color fastness requirement. So we examined cotton, nylon 6, and polyester fabrics dyed with vat dyes. Cotton, nylon 6 and polyester fabrics were dyed with vat dyes such as C. I. Vat Blue 1, Blue 19, Black 9, Green 1, Orange 2, and Violet 1 containing sodium hydrosulfite and NaOH. Oxidation were carried out by a sodium peroxoborate after dyeing. The dyed materials were soaped at the boil after oxidation. Especially hydrolysis and overreduction for dyed polyester with vats dyes containing -NHCO- and -NH- groups such as C. I. Vat Blue 6, Black 25, Black 27, Red 10, and Green 3 occurred. It seems that these phenomena are due to a high dyeing temperature. Wash and rubbing fastness of nylon are higher than that of cotton and polyester. Light fastness of cotton is higher than that of polyester and nylon.

• 복식문화연구
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• 제16권1호
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• pp.158-165
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• 2008

The purpose of this study was to investigate the dyeing property and ultraviolet-cut ability on silk 100% and nylon 100% fabrics dyed with Rhus verniciflua extracts. This study was investigated K/S values, surface color, washing fastness, dry cleaning fastness and ultraviolet-cut ability of the silk and nylon fabrics dyed with Rhus verniciflua extracts under the various dyeing conditions. As mordanting were used Tin(II) Chloride dihydrate $(SnCl_2{\cdot}2H_2O)$, Copper(II) sulfate pentahydrate$(CuSO_5{\cdot}5H_2O)$, Iron(II)Chloride$(FeC_2{\cdot}4H_2O)$. pH was adjusted by sodium carbonate$(Na_2CO_3)$ and formic acid(HCOOH). The optimum dyeing temperature, dyeing time, and pH of the silk fabrics dyed with Rhus verniciflua extracts were $90^{\circ}C$, 100min, and in the nylon fabrics were $90^{\circ}C$, 45min. It were colored(munsell value) 6.4Y 7.5/4.1 in the silk fabrics and colored 4.3Y 6.6/5.9 in the nylon fabrics dyed with Rhus verniciflua extracts. Washing fastness and dry-cleaning fastness in the silk and nylon fabrics dyed with mordanting agent improved in $4{\sim}5$ grade. UV-A test showed that nylon fabrics a high rate of 92% with Rhus verniciflua extracts.

• 한국염색가공학회지
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• 제11권3호
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• pp.41-48
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• 1999

The removal of hemoglobin from acrylic acid grafted Nylon fabrics has been investigated. In order to change detergency of Nylon 6 fabric, acrylic acid(AA) were graft copolymerized on Nylon fabric using ammonium persulfate(APS) as a initiator, and then acrylic acid grafted Nylon was treated with NaOH solution. The graft ratio increased linearly with increasing acrylic acid concentration. The graft ratio was the highest when the concentration of APS was 0.05%, and it decreased as the concentration of APS increased. The surface of Nylon fabric became rough due to graft. Moisture regain was increased by graft and alkaline treatment, contact angle was also improved compared with the ungrafted. The hemoglobin was easily solubilized and removed from grafted Nylon fabric, while it was difficult to remove hemoglobin from ungrafted Nylon fabric. The effects of graft on removal of hemoglobin was related with increase of moisture regain and transformation of COOH to COONa by alkaline treatment.

• 한국기계가공학회지
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• 제8권4호
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• pp.104-109
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• 2009

In this paper, polymer nanocomposites were fabricated by mixing fire-resistant and high pseudoplastic Nylon 6,6 with MWNT(Multiwalled Nanotube), which has mechanical, electrical, and heat stable properties. The experiments were performed in order to investigate their mechanical and electrical properties depending on the level of MWNT and the presence of acid treatment on Nylon 6.6. Morphology of polymer nanocomposites was observed using Scanning Electron Microscopy technique. The results indicate that the polymer nanocomposites have the best mechanical and electrical properties in the optimal conditions of Nylon 6.6 and MWNT(10wt%).

• 대한기계학회논문집A
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• 제26권6호
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• pp.1159-1168
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• 2002

Power-transmission Nylon pinions against steel gears fur different pitch line velocities was studied with a power circulating gear test rig under unlubricated condition by SEM(Scanning Electron Microscope). The wear characteristics of Nylon pinions varied significantly with the pitch line velocity and applied load. Wear occurred most severely at the regions including pitch circle and root circle of Nylon pinions. It is confirmed that Nylon pinions are able to be used fer power-transmission under limited conditions.

• Elastomers and Composites
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• 제40권3호
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• pp.159-165
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• 2005

반응성 모노머인 글리시딜메타크릴레이트 (GMA)를 과산화제를 이용하여 저밀도폴리에틸렌(LDPE)에 그라프트 한 후 이를 이용하여 나일론-6와 반응블렌드를 동방향 이축압출기를 사용하여 실시하였다. GMA의 그라프트는 FT-IR을 이용하여 확인하였으며, GMA의 그라프트율은 반응온도, 과산화제의 농도, 공단량체로 사용된 스티렌의 농도가 증가함에 따라 증가함을 알 수 있었다. LDPE/나일론-6 반응블렌드 보다는 LDPE-g-GMA/나일론-6 블렌드의 인장강도 및 신율이 향상됨을 알 수 있었으며, 스티렌이 첨가된 경우 보다 향상된 값을 나타냄을 알 수 있었다. 반응물의 모폴로지는 SEM을 이용하여 측정하였다.

• Composites Research
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• 제24권4호
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• pp.1-4
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• 2011

수정된 Hummer's 방법으로 제조된 산화그래핀(graphene oxide, GO)을 이용하여 PMMA와 Nylon 6,6에 분산시켜 각각 복합재료 섬유와 필름으로 제조하고 동적기계적 물성과 인장특성을 분석하였다. 동적기계적 분석과 인장 특성에서 GO-PMMA 복합재료 섬유는 GO의 효율적 기계적 물성 보강 효과를 확인 하였으나 Nylon 6,6 복합재료는 제조과정에서 사용된 포름산의 낮은 pH로 인해 산화그래핀의 분산안정성이 저하되어, 낮은 보강효율을 보임을 알 수 있었다.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2011년도 제45차 학술발표회
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• pp.27-27
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• 2011

일반 나일론6 폴리머 대비 수축률이 높은 수축률을 가질 수 있는 나일론 고수축 개질 폴리머를 개발하고 이를 이용하여 고권축/고벌키 특성이 우수한 세섬 20d급의 나일론/Co-나일론계 고권축 소재를 개발하기 위하여 나일론 개질폴리머의 구조와 물성에 대한 연구 조사가 필요하다. 기존 나일론6 중합은 카프로락탐만을 사용하여 중합되므로 선형의 분자 구조를 가지게 되어 섬유형태로 방사했을 경우 수축률이 균일하게 되므로 수축율이 다른 나이론 폴리머를 만들기 위해서는 카프로락탐 외에 폴리머 분자구조를 변화 시킬 수 있는 공중합 모노머를 사용하여 랜덤하게 공중합을 해야한다. 일반적으로 사용되는 공중합 모노머는 말단이 -COOH나 -NH2로 되어서 카프로락탐과 반응할 수 있는 물질이 많이 사용되어 진다. 최근 수축률을 높이기 위한 공중합 모노머로는 SSIPA나 Meta xylene diamine과 같이 비 선형구조를 가지는 모노머를 사용하여 폴리머의 구조를 변화시켜 수축율을 높이고 있다. 이를 일반 나이론 6와 사이드 바이 사이드 방사를 하게 되면 두 폴리머의 수축율 차이로 인해 미케니컬 수축력을 발현시키고 있다. 따라서 본 연구에서는 스포츠/레저용 초경량 Nylon 박지에 적합한 자발신장 개념인 Nylon6 잠재권축 소재를 개발하기 위하여 $14^D$수준의 Co-Nylon6의 구조와 물성을 조사 검토하여 이를 실제 현장에 자료를 제공하는 것을 목적으로 하였다.

• 폴리머
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• 제38권6호
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• pp.714-719
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• 2014

라이신과 글루코오스에서부터 제조된 카프로락탐과 모폴리논을 음이온 개환중합법을 이용하여 나일론 6-모폴리논 랜덤 공중합체를 합성함으로써 바이오매스 기반의 새로운 나일론을 제조할 수 있었으며 또한 친수성이 향상된 나일론 6을 제조할 수 있었다. 중합 조건을 적절하게 조절함으로써, 점도평균분자량 30000 g/mol과 수율 80%의 공중합체를 제조할 수 있었다. 모폴리논을 공중합 단량체로 사용함으로써 나일론 6의 친수성을 높게 향상시킬 수 있었다. 제조된 나일론 6-모폴리논 랜덤공중합체를 시차주사 열량계(DSC), 열중량 분석기(TGA), X-선 회절분석기(XRD), 점도계, 접촉각 측정기와 같은 분석방법으로 그 특성을 분석하였다.