원문정보
초록
영어
Printing inks are basically dispersions of solid pigment particles in a vehicle. Pigment flocculation and/or colloidal aggregates created by thixotrope additives form a three- dimensional network in the inks. This structure complicates the flow behaviour of inks. However, if the internal structure is formed under control, the printing process will benefit from it because the ink must satify rheological requirements over a very wide range of shear conditions. The presence of internal structure results in the following prominent non-Newtonian rheological properties: viscoelasticity, yield stress, shear thinning and thixotropy. If the components of printing inks were changed, the rheological characteristics such as viscosity, yield stress, viscoelasticity and tack value were considerably varied. Thus, in this paper, the effects of changing the content of rosin modified phenolic resin on rheological properties of the vehicle will be studied. For that, the rheological properties were found by flow, yield stress, creep and oscillation measurements using Bohlin C-VOR Rotational Rheometer. And Emulsion rheology and its microstructure will be investigated.
목차
1. 서론
2. 실험
2-1. 수지의 분자량 측정
2-2. Sample 제조
2-3. Sample의 유변학적 특성 측정
2-4. 유화율의 측정
3. 결과 및 고찰
3-1. 수지의 분자량 측정 결과
3-2. Flow measurement 결과
3-3. Yield stress measurement 결과
3-4. Creep measurement 결과
3-5. Oscillation measurement 결과
3-6. 유화율 측정 결과
3-7. Emulsion의 유변학적 특성
3-8. Emulsion의 미세구조
4. 결론
참고문헌