Diglycidy1 ether of bisphenol A-Methylene dianiline-Succinonitrile계의 열경화 거동

심미자,김상욱,Sim, Mi-Ja,Kim, Sang-Uk 한국재료학회 1993 한국재료학회지 Vol.3 No.1

Diglycidy1 ether of bisphenol A(DGEBA)와 강화제로서 4, 4'-methylene dianiline(MDA)에 반응성 첨가제 succinonitrile(SN)을 첨가한 새로운 계를 적외선 흡수분광도법(FT-IR)으로 경화반을 메카니즘을 연구하였으며, 이것은 반응성 첨가제의 함량을 다르게 첨가시켜 각각 8$0^{\circ}C$부터 17$0^{\circ}C$까지 3$0^{\circ}C$ 간격으로 1시간동안 경화시킨 시료를 가지고 고찰하였다. 그 결과 제 1차 아민 수소와 에폭사이드기의 반응, 제 2차 아민 수소와 에폭사이드기의 반응, 에폭사이드기와 수산기와의 반응에 추가적으로 제 1차 아민수소와 SN의 니트릴기와의 반응, 니트릴기과 수산기와의 반응이 일어나 최종적으로 주쇄간 결합 길이를 연장시키고 있음을 알 수 있었다. Abstract Fourier transform infrared (FT -IR) instrument was used to st.udy the thermoset behavior of DGEBA/MDA system with succinonit.rile. That was experimented with the samples which were cured from 8$0^{\circ}C$ to 17$0^{\circ}C$ every 3$0^{\circ}C$ for 1 hour and uncured with different SN content. respect.ively. It was known that prImary amine hydrogen reacted wit.h epoxide group, secondary amine hydrogen with epoxide group and hydroxyl with epoxide group. In addition. the reaction of primary amine hydrogen with nitrile gorup of SN and of hydroxyl group with nitrile group of SN came about. These t.wo reactions made chain bond length longer between main chains.

DGEBA/MDA/MN/HQ계의 경화반응과 열적 안정성

심미자,김상욱,Sim, Mi-Ja,Kim, Sang-Uk 한국재료학회 1995 한국재료학회지 Vol.5 No.5

Diglycidyll ether of bisphenol A(DGEBA)/4, 4'-methylene dianiline(MDA)계에 반응성 첨가제 malononitrile(MN)을 첨가하면 내충격성은 크게 향상되나 반응속도는 감소하게 된다. 에폭시 수지의 경화반응은 에폭시기가 개환되어 생성되는 히드록시기가 촉매로 작용하는 자촉매 반응이며, 외부에서도입된 히드록시기도 같은 효과를 나타낸다. 따라서 본 연구에서는 DGEBA/MDA/MN 계의경화 반응속도를 증가시키기 위해 히드록시기를 가진 촉매로서 hydroquinone(HQ)을 도입하였고 이들 계의경화특성 및 열적성질을 고찰하였다. HQ가 첨가됨으로 인해 활성화 에너지는 감속하고 속도상수는 증가하였으며, 발열곡선에서 반응 시작온도가 낮아졌다. 이 결과로부터 HQ가 반응 가속제로 작용하고 있음을 알 수 있다.

토의수업전략 : 퍼실리테이팅 기법

심미자,Sim, Mi-Ja 한국대학교육협의회 2008 大學敎育 Vol.154 No.-

Succinonitrile 이 diglycidyl ether of bisphenol A/ methylene dianiline계의 열적 성질에 미치는 영향

심미자,김상욱,Sim, Mi-Ja,Kim, Sang-Uk 한국재료학회 1993 한국재료학회지 Vol.3 No.2

에폭시 수지로 bisphenol계diglycidy1 ether of bisphenol A(DGEBA)type에 아민계 경화제 4, 4'-methylene dianiline(MDA)를 사용한 계에 나타나는 취약점인 담약성을 개선하고자 반응성첨가제 succinonitrile(SN)을 첨가하였다. 이때 나타나는 화학적 구조의 변화로 야기되는 유리전이온도(Tg), 열분해온도(Td), 초기 열분해 온도($T_{-5%}$)를 SN의 함량비와 경화조건을 달리하여 고찰하였다. 이들 열적성질들은 SN의 함량이 증가함에 따라 유리전이온도와 열분해 온도는 감소하였고, 초기열분해에 일어나 5%의 중량감소가 나타나는 온도 또한 감소하였으나, 혼합액을 높은 온도에서 경화 시킬 경우 이들 열적성질들은 증가하였다. Abstract In order to improve the brittleness of diglycidyl ether of bisphenol A(DGEBA)/4, 4'-methylene dianiline(MDA) system, the reactive additive, succinonitrile(SN) was added to DGEBA/MDA system. In this case, thermal properties, glass transition temperature(Tg), thermal decomposition temperature(Td) and 5% weight loss temperature($T_{-5%}$)were investigated according to the different SN contents and cure temperatures. Tg, Td and $T_{-5%}$ decreased as the SN content was increased, but increased as the cure temperature was increased.

Characteristics of Crosslinked Resin Modified with Nitriles

심미자,Sim, Mi-Ja Materials Research Society of Korea 1999 한국재료학회지 Vol.9 No.4

The cure mechanicsm and cure kinetics of diglycidyl ether of bisphenol A(DGEBA)/4,4'-methylene dianiline(MDA)/nitrile(MN, SN, GN) systems were studied by FT-IR and DSC to develop new applications in the biomedical polymer fields. The network structure of the DGEBA/MDA system was changed to the chain-extended network structure by the addition of nitriles. The reactions contributed to the chain extension were the primary amine-nitrile and hydroxyl-nitrile reactions. The chain-extended network structure could be indirectly proved by the decrement of T\ulcorner and the increment of impact strength with the increasing nitrile content. The cure rate of DGEBA/MDA/nitrile system was lower than that of DGEBA/MDA system due to the disturbance of nitrile group in the reaction of primary amine and epoxide groups.

전문직 여성의 피부관리 및 화장 유형에 관한 연구

심미자(Sim Mi-Ja),김금희(Kim Gum-Hee) 한국인체미용예술학회 2003 한국인체미용예술학회지 Vol.4 No.2

  This study has been done on the skin health care and make-up for professional women in 20, 30years in Daegu area.<BR>  The results are as follows.<BR>  First, a professional women recognize themselves not healthy from stress and health in the performing their duty. So the scientific and systematic self-care plans for solving the stress properly and abstaining from drinking are in need.<BR>  Secondly, in the skin type, dry skin types are showed mostly and the worry for liver spot freckles in the skin condition are the most. For this reason, the unified skin care plan are requested so much.<BR>  Thirdly, as the respondents are showed doing wrong treatment for skin trouble, proper treatment in the professional medical center are demanded.<BR>  Finally, in the questionnaire for the make-up, the response are on the whole showed that make-up has been done for satisfaction after make-up and upgrade a refined and esthetic image. Therefore,<BR>  women in modern days are showed that they are in trust for the image effect for make-up

발마사지가 혈액 암 환자의 피로와 우울에 미치는 효과

심미자 (Sim, Mi Ja),유양숙 (Yoo, Yang Sook),최다미 (Choe, Da Mi),정상옥 (Chung, Sang Ok),정진 (Jung, Jin),전진영 (Jeon, Jin Yeong),박정인 (Park, Jeong In),은방희 (Eun, Bang Hee),김광성 (Kim, Kwang Sung) 병원간호사회 2008 임상간호연구 Vol.14 No.3

Purpose: This study was to investigate the effects of foot massage on fatigue and depression among patients undergoing chemotherapy with hematological malignancies. Method: The subjects were 60 patients hospitalized for undergoing chemotherapy from September 2007 to March 2008, and 30 of them were the experimental group and the other 30 were the control group. To the subjects in the experimental group, foot massage was provided for 30 minutes everyday before the chemotherapy at the same time for 4 days, and the effect was measured on Day 4 and 5 after chemotherapy. Fatigue was measured using the Brief Fatigue Inventory (BFI) developed by Mendoza et al. (1999), and depression was measured by psychiatric rating scale SCL?]90?]R developed by Derogatis (1977) and translated by Kim Gwang il et al. The data were analyzed through ???u -test, Fisher's exact test, unpaired t?]test and repeated measures ANOVA using SPSS 12.0. Results: Fatigue and depression were significantly lower in the experimental group than in the control group. Even on Day 5, fatigue and depression were significantly lower in the experimental group than in the control after finish foot massage. Conclusion: The findings of the study demonstrated that foot massage would be an effective nursing intervention to reduce fatigue and depression in patients with hematological malignancies.

고객에 대한 미용기술서비스 만족에 영향을 미치는 요인에 관한 연구

심미자(Mi-Ja Sim),김은숙(Eun-Suk Kim),조명숙(Myeung-Suk Cho) 한국인체예술학회 2004 한국인체미용예술학회지 Vol.5 No.1

This study conducted a questionnaire survey toward man customers and woman customers of hair dresser"s shops, who are living in Daegu, Kyungbuk, in order to know factors influencing on customers" satisfaction with technical services for hair beauty. This questionnaire by personal self-administration was carried from November 25th to December 15th, 2003, 423 copies out of collected data were used for this study. This paper used one-way ANOVA in order to know satisfaction degrees by factors toward customer techniques and satisfaction degrees toward customer techniques, according to examinees" general characters and hair-related characters. Correlation Analysis was used to know relations between satisfaction degrees toward customer techniques and related factors, and Multiple Regression Analysis was used to examine effect degrees between satisfaction degrees toward customer techniques and related factors. Summing up this study, results are as follows; 1. In satisfaction degrees by factors toward customer techniques according to general characters and hair-related characters, as for satisfaction degrees by factors toward customer techniques according to general characters, money amount satisfaction toward technique service showed significant differences in age and religion(p<0.05), age, educational degree, monthly income showed significant differences concerning psychological satisfaction with hair-style change(p<0.05). Satisfaction with hair style directions proper for face shape were significantly different from age(p<0.05), satisfaction with technical expertness were significantly different in marital status, age, educational background(p<0.05),satisfaction with getting special techniques were significantly different from age(p<0.05). In satisfaction degrees by factors toward customer techniques according to hair-related character, money amount satisfaction with technique service were significantly different from frequency of using hair dresser"s shops for 1 year(p<0.05), cost-appropriateness satisfaction in the technical side were significant different from sorts of hairdye(p<0.05). Psychological satisfaction with hair style change was significantly different from sorts of hairdye, ratio of white hair, and frequency of using hair dresser"s shops for 1 year(p<0.05), satisfaction with hair style directions proper for face shape were significantly different from hair length, sorts of hairdye, customers" recent use term of hair dresser"s shops(p<0.05), satisfaction with technique expertness showed significant differences in hair length, sorts of hairdye, ratio of white hair(p<0.05). Satisfaction with getting special techniques were significantly different from sorts of hairdye(p<0.05). 2. In satisfaction degrees toward customer techniques according to examinees" general characters and hair-related characters, satisfaction degrees toward customer techniques showed significant differences in age only(p<0.05), satisfaction degrees toward customer techniques according to hair-related characters showed significant differences in hair length and hair style states(p<0.05). 3. In correlation between satisfaction degrees toward customer techniques and related factors, factors showing plus significant correlation were money amount satisfaction toward technical services, cost-appropriateness in the technical side, psychological satisfaction with hair style change, hair style directions proper for face shape, satisfaction with technical expertness, and acquirement of special technique. Among those factors, satisfaction with technical expertness showed the highest correlation in its correlation coefficient 0.5511. 4. Factors showing significant effects in the Regression Analysis on satisfaction degrees toward customer techniques and related factors wer

매미눈꽃동충하초(Paecilomyces sinclairii)로부터 추출한 조다당류의 면역 활성과 항암 효과에 관한 연구

심성미 ( Sim Seong Mi ),임경환 ( Im Gyeong Hwan ),이우윤 ( Lee U Yun ),김정완 ( Kim Jeong Wan ),심미자 ( Sim Mi Ja ),이민웅 ( Lee Min Ung ),이태수 ( Lee Tae Su ) 한국균학회 2003 韓國菌學會誌 Vol.31 No.3

Diglycidyl ether of bisphenol A/Methylene dianiline/Succinonitrile계의 경화반응 속도론

조성우,심미자,김상옥,Jo, Seong-U,Sim, Mi-Ja,Kim, Sang-Ok 한국재료학회 1992 한국재료학회지 Vol.2 No.4

The cure kinetics of a diglycidyl ether of bisphenol A (DGEBA) with 4, 4'-methylene dianiline (MDA) added succinonitrile was studied through the dynamic run method by applying the data to the Kissinger equation which analyses the effect of the heating rate on the temperature at maximum reaction rate using Differential Scanning Calorimetry (DSC) analyzer in the range of 3$0^{\circ}C$-35$0^{\circ}C$. In the DGEBA/MDA system with SN, the activation energy ($E_a$) and the pre-exponential factor (A) were calculated. From these results, the rate constants (k) were obtained according to the different SN contents. Diglycidyl ether of bisphenol A (DGEBA)와 경화제로서 4, 4'-methylene dianiline(MDA) 에 반응성 첨가제 succinonitrile(SN)을 첨가한 새로운 계를 Differential Scanning Calorimetry (DSC)로 이용하여 3$0^{\circ}C$부터 35$0^{\circ}C$의 온도 범위에서 승온적 진행 방범(dynamic run method)으로 얻은 값을 가지고 최대 반응속도에서의 온도에 승온속도가 미치는 영향을 해석 할 수 있는 kissinger식을 적용하여 경화반응 속도론을 연구하였다. SN을 첨가한 DGEBA/MDA계의 활성화에너지 ($E_a$)와 pre-exponential factor(A) 그리고, SN이 첨가될 때 에폭시와 아민과의 반응속도 상수 k를 구하였다.