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22대 대한민국 국회 국회정보길라잡이 국회의원검색
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ABSTRACT

목차

1. 서론 7

2. 이론 11

2-1. Capillary Rheometer의 일반론 11

2-2. Die Swell 23

2-3. 점성도의 온도 의존성 30

2-4. 충전된 계에서의 유성학적 성질 33

3. 실험 39

3-1. 시편 준비 39

3-2. 유성학적 성질 측정 41

4. 결과 및 고찰 44

4-1. 혼합 시간에 의한 효과 44

4-2. 겉보기 점성도 47

4-3. 활성화 에너지 60

4-4. Die Swell 69

4-5. Yield Stress 78

5. 결론 90

6. NOMENCLATURE 91

7. REFERENCES 95

초록보기

 The rheological properties of ABS-carbon black melts were studied using Capillary Rheometer.

The apparent viscosity of ABS-carbon black melts increased with increasing the amount of carbon black and decreased with an increase in temperature. Power law index of ABS-carbon black melts decreased with an increase in temperature and that of ABS decreased with an increase in temperature.

Relative viscosities increased with an increase in temperature and decreased with an increase in shear rate. Those relative viscosities, varied by the volume fraction of filler, were much larger than other values derived from various theories. It can be, therefore, concluded that relative viscosity is a function of temperature and shear rate as well as volume fraction.

The apparent viscosity increased owing to the structure factor when the structure of carbon black packed was developed.

The activation energy obtained under constant shear rate decreased with increasing shear rate.

Swelling ratio was independent of medium used when the sample was frozen but decreased as the content of carbon black increased.

Yield stress decreased with an Increase in temperature and increased with increasing amount of carbon black. Particularly, cross head speed of plunger influenced the yield stress, which is independent of the size of Capillary. It was found that yield stress could be obtained with cross head speed from 0.1 cm/min to 0.15 cm/min.

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