• 무역상무연구
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• 제13권
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• pp.515-536
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• 2000

This study analyzes the U.S. case law which challenges the legal conclusions of the district court with respect to the applicability, and effect, of the doctrine of waiver and estoppel in addition to the doctrine of documentary cure. The impliations are as follows. First, the documentary cure requirement can not be interpreted to mean early enough to allow the beneficiary to cure and represent the documents before the presentment deadline or expiry date of letter of credit. The mere fact that the presentment period expired before the completion of bank's review and notification process does not compel any conclusion about whether the examiner spent a reasonable amount of time examining the documents. Indeed, the reasonable time requirement does not imply that banks examine a presentation out of order or hurry a decision based upon particular needs or desires of a beneficiary. Secondly, even if the doctrine of waiver can apply to letter of credit governed by the strict compliance standard, a one-time acceptance of discrepant documents by a bank does not waive the bank's right to insist upon conforming documents in all subsequent letter of credit transactions between the bank and beneficiary. Revised UCC Article 5 is highly persuasive on this point: waiver of discrepancies by issuer or an applicant in one or more presentation does not waive similar discrepancies in a future presentation. Neither the issuer nor the beneficiary can reasonably rely upon honor over past waivers as a basis for concluding that a future defective presentation will justify honor.

• Elastomers and Composites
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• 제52권2호
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• pp.105-113
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• 2017

The curing behavior, mechanical properties, hot-air aging resistance, abrasion properties,thermal properties, etc., of EVM/EPM/APP (ammonium polyphosphate)/DPER (dipentaerythritol)/EG (expandable graphite) and EVM/EPM/ATH (aluminium trihydroxide) flame retarding systems in ethylene vinyl acetate rubber (EVM) blends with EPM (ethylene propylene rubber) were sequentially examined. For both flame retarding systems, the torque values increased with the content of EPM rubber and with the vulcanization time. As the content of EPM rubber increased, the scorch time became shorter, whereas the optimum cure time followed an increasing trend. For the EVM/EPM/APP/DPER/EG flameretarding system, as the content of EPM rubber increased, the hardness did not change,whereas the tensile strength and elongation at break decreased. A hot-air aging resistance test at $150^{\circ}C$ showed that the heat resistance decreased with the EPM content regardless of the kinds and contents of flame retardants. As the EPM content increased, the abrasion rate became higher and the abrasion resistance of the EVM/EPM/APP/DPER/EG flame retarding systems exceeded that of the EVM/EPM/ATH flame retarding counterparts. In comparison with the EVM/EPM/ATH flame retarding systems, the thermal stability of the EVM/EPM/APP/DPER/EG flame retarding system showed an increasing tendency.

• Design & Manufacturing
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• 제7권1호
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• pp.60-63
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• 2013

Recently, Silicone that one of the thermo-sets is used to making optical products such as LED lenses because of excellent thermal properties. LED lenses are required to keep the precise dimensions, so they must be molded to have the minimum deformation. Thermo-sets have the expansion characteristic on the part of thermal property, it is important to optimize the cure condition so that the deformation of the part become minimum. In this study, to investigate the relationship between the shrinkage by the curing and expansion by the thermal properties of the resin, reactive injection experiment was performed by setting the variables such as mold setting temperature, cure time. As a result, it was confirmed that there was a interval while the thermal properties were transferred to more active during the cure process. It is expected to help in determining the reactive injection molding conditions of the thermo-set parts as well as LED lens in order to reduce the amount of deformation.

• 폴리머
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• 제25권2호
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• pp.233-239
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• 2001

Mechanical mixing법으로 ethylene propylene diene terpolymer (EPDM)과 ethylene propylene diene terpolymer (EPDM)과 acrylonitrile butadiene rubber (NBR) 블렌드 혼련물을 제조하여, 이들의 무늬 점도, 가교 거동, 영구 압축 줄음율 및 동적 기계적 성질 등을 검토하였다. Rheovibron에 의한 동적 특성 측정의 결과로부터 EPDM/NBR 블렌드는 -43$^{\circ}C$ 및 -4$^{\circ}C$ 부근에서 두 개의 전이를 보였으며 이를 각각 NBR 고무 및 EPDM 고무의 T$_{g}$로 해석하였다. tan${\delta}$ 피크의 위치는 NBR 고무의 함량이 증가함에 따라 고온 쪽으로 이동함을 확인할 수 있었다. 또한 NBR 고무량이 증가할수록 최적 가황시간이 단축되는 경향을 보였다.

• Elastomers and Composites
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• 제43권2호
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• pp.104-112
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• 2008

통상적인 고무블렌드 방법에 따라 개방식 2-롤밀을 사용하여 ethylene propylene diene terpolymer (EPDM)과 styrene butadiene rubber (SBR) 블렌드 배합물을 제조하여, 이들의 경화 특성, 기계적 성질 및 내오존성 등을 검토하였다. SBR함량이 증가할수록 가황곡선의 토크가 증가하였다. 최대 토크는 SBR 25wt% 일 때 가장 낮았으며 그 이상의 SBR 량에서는 직선적으로 증가하였다. 스코치시간 및 최적경화시간은 SBR고무 함량이 증가함에 따라 감소하였다. 경도는 SBR 함량이 50wt% 일 때 최고값을 보였으며 그 전후에서는 감소하는 경향을 보였다. 내오존시험에 있어서 소량의 EPDM 고무의 첨가에 의하여 내오존성이 크게 개선됨을 확인할 수 있었다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1220-1223
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• 2003

The UV nanoimprint technology uses the UV light as the energy source. Because the imprint process is carried out in room temperature and low pressure, this technology has its own merits compared to the thermal nanoimprint. However, in UV nanoimprint technology, a resin which has low viscosity is essential for the improvement of accuracy. In this research, a resin (named as IMS01) which has relatively low viscosity was developed. And a measurement system was developed in order to measure the degree of cure of the resin. The measurement system which is composed of FT-IR, UV light source and optical guide can measure the degree of cure in real time. From the experimental results, it was found that the IMS01 is cured more rapidly than existing resin (PAK01).

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2002년도 춘계 기술심포지움 논문집
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• pp.152-157
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• 2002

The cure and rheological behavior of Diglycidyl ether of bisphenol F, catalyzed by four kinds of imidazoles and a Nadic methyl anhydride curing agent were studied using a differential scanning calorimeter (DSC) and rheometer. The isothermal traces were employed to analyze cure reaction. The DGEBF/anhydride conversion profiles showed autocatalyzed reaction characterized by maximum conversion rate at 20~40 % of the reaction. The rate constants obtained from isothermal test showed temperature dependance, but reaction order did not. The order of reaction (m+n) was calculated to be close to 3. The measurements of viscosity and relation time in the presence of inorganic fillers were carried out at different isothermal curing temperatures. The viscosity and gelation time increased with filler content at the same isothermal temperature.

• 접착 및 계면
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• 제21권1호
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• pp.6-13
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• 2020

The objective of the current study is to characterize the long-term stability and efficacy of a structural adhesive assembly under static load. An apparatus was designed to be used in the Instron tensile test machine that would allow for real time modeling of the failure characteristics of an assembly utilizing a moisture- cure adhesive which was bonded to concrete. A regression model was developed that followed a linear - natural log function which was used to predict the expected life of the assembly. Evaluations at different curing times confirmed the structure was more robust with longer cure durations prior to loading. Finally, the results show that under the conditions the assembly was tested, there was only a small amount of inelastic creep and the regression models demonstrated the potential for a stable structure lasting several decades.

• 대한한의학원전학회지
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• 제29권3호
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• pp.41-56
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• 2016

Objectives : The paper analyzes food cure recipes related to wind diseases as written in Sikuisimgam, Eumsunjungyo Shikyojaebyeong, and Singnyochanyo. The paper shall then use results of the analysis to consider food cure recipes utilized by patients who are suffering from wind diseases or who are showing symptoms of wind diseases. The paper aims to help cure modern diseases related to wind diseases and make a set of suggestion about preventive foods. Methods : Important dietary guidebooks in Korea and China were studied, and the author studied only the ones among the food cure recipes that had wind diseases for which they are effective. Sikuisimgam 16 species, Eumsunjungyo Shikyojaebyeong 13 species, Singnyochanyo 13 species of food cure recipes related to wind diseases were extracted, and they were studied based on their ingredients, cooking style, and administration time. Results : There are food ingredients introduced as effective for curing wind diseases within Sikuisimgam, Eumsunjungyo Shikyojaebyeong, and Singnyochanyo. Among them, some of the ones that can be utilized in the modern age are: arrowroot(葛粉), nepta herb(荊芥), Baekryangmi(白粱米), Dongmaja(冬麻子), milled rice(白米), Eokiin(薏苡人), fermented soybean, chongbaek, Wubanggeun(牛蒡根), soy beans(大豆), grass(椒), xanthium fruit(蒼耳子), changi leaves(蒼耳葉), jinpi(陳皮), black pepper(胡椒), ginger(生薑), mint leaves(薄荷葉), suyu, heukjima(黑脂麻), ojagye, chives, and Baekyuma(白油麻). Conclusions : The food ingredients extracted from Sikuisimgam, Eumsunjungyo Shikyojaebyeong, and Singnyochanyo are effective in curing wind diseases, and they should be processed in ways that enable the people of this age to consume more of them. Moreover, people who have not yet suffered from wind diseases but are showing the symptoms of wind diseases will benefit from taking care of their blood pressure by consuming these foods in their everyday lives. Such people will serve as examples of good food cure recipes.

• 대한기계학회논문집A
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• 제24권11호
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• pp.2853-2865
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• 2000

During the curing process of thick glass/epoxy laminates, a substantial amount of temperature lag and overshoot at the center of the laminates is usually experienced due to the large thickness and low thermal conductivity of the glass/epoxy composites. Also, it takes a longer time for full and uniform consolidation. In this work, temperature, degree of cure and consolidation of a 20 mm thick unidirectional glass/epoxy laminate were investigated using an experiment and a 3-dimentional numerical analysis. From the experimental and numerical results, it was found that the experimentally obtained temperature profile agreed well with the numerical one, and the cure cycle recommended by the prepreg manufacturer should be modified to prevent a temperature overshoot and to obtain full consolidation.