Internal Mixer에서의 고분자 유동 및 혼합거동에 관한 연구

김진국

Korean Journal of Rheology, Vol.2, No.1, 60-66, June, 1990

Export Citation

Internal Mixer에서의 고분자 유동 및 혼합거동에 관한 연구

Basic Studies of Polymer Flow and Mixing Behaviour in an internal Mixer

김진국

초록

혼합공정은 화학공학, 식품공학, 건축공학 등 여러 가지 산업분야에 걸쳐 이용되는데, 최근 고분자 분야에서도 신소재 개발 또는 제품의 물성을 향상시키기 위하여 이에 대한 연구가 활발해지고 있다. 고분자 가공에서 혼합에 이용되는 대표적인 기계로는 twin screw extruder, internal mixer, two roll mill 등이 있는데 본 연구에서는 internal mixer에서의 고분자 유동 및 혼합거동을 파악하고자 하였다. 실험적으로는 flow visualization 방법을 써서 순환시간을 측정하였고, 시뮬레이션을 통하여 이론적으로 이를 검토하였다. 고분자 거동은 비뉴우톤 유체로서 설명되기 때문에 본 연구에서는 혼합기의 구조적 특성을 고려한 모델로서 η = η₀ / 1+A[2trd²]^(1-n)/2 을 사용하였다.

Mixing has been applied to many industries; chemical engineering, food engineering, architecture engineering, etc. Recently many researches in this area have been conducted for the polymer industry to develop new materials and to improve the quality of products. In general, twin screw extruders, internal mixers, and two roll mills have been used for mixing and compounding. Flow behavior in the internal mixer was studied to explain the characterization of mixing mechanism in this paper. Experimentally, flow behavior and circulation time were observed through the flow visualization technique. Theoretically, the problem was approached through the computer simulation using hydrodynamic lubrication theory. Since polymers act as a non-Newtonian fluid, we used a rheological model as follows;

η = η₀ / 1+A[2trd²]^(1-n)/2

Keywords:Flow visualization technique;Mixing;Flow;Circulation time;Hydrodynamic;lubrication theory;Internal mixer

[References]

Freyburger P, German Patent, 1459 (1877)
Banbury FH, U.S. Patent, 1,200,070 (1916)
Comes DA, Ind. Rubber World, 122, 178 (1950)
Freakley PK, Patel SR, Rubber Chem. Technol., 58, 751 (1985)
Toki S, Takeshita M, Morimoto Y, Okayama M, "Experimental Study of Rubber Flow Behavior in an Internal Mixer by Pressure Transducers," Paper Presented at the ACS Rubber Division, Houston, Texas, October (1983)
Freakley PK, WanIdris WY, Rubber Chem. Technol., 52, 134 (1979)
Asai T, Fukui T, Inoue K, Kuriyama M, "The Study of Distributive Performance of Rubber Mixing in an Internal Batch Mixer," Paper Presented at Int. Rubber Conf., Paris, June (1982)
Min K, White JL, Rubber Chem. Technol., 58, 1024 (1985)
Min K, Int. Polym. Process., 1, 179 (1987)
Prager W, Appendix to article by J.T. Bergen in "Processing of Thermoplastic Materials," edited by E.C. Bernhardt, Reinhold, NY (1959)
Bolen WR, Colwell RE, SPE J., 14(8), 24 (1958)
Manas-Zloczower I, Nir A, Tadmor Z, Rubber Chem. Technol., 55, 1956 (1982)
Manas-Zloczower I, "Flow and Mixing Mechanism in an Internal Mixer," Paper presented an International Rubber Seminar Akron, November (1988)
Kim JK, White JL, Min K, Szydlowski W, Int. Polym. Process., 4, 9 (1989)
Kim JK, "Analysis of Flow and Mixing in an Internal Mixer with Different Rotor Designs," Ph.D. Dissertation, (Univ. of Akron) (1989)
Cross MM, Rheol. Acta, 18, 609 (1979)
Booy ML, Polym. Eng. Sci., 21, 93 (1981)

[1] Freyburger P, German Patent, 1459 (1877)

[2] Banbury FH, U.S. Patent, 1,200,070 (1916)

[3] Comes DA, Ind. Rubber World, 122, 178 (1950)

[4] Freakley PK, Patel SR, Rubber Chem. Technol., 58, 751 (1985)

[5] Toki S, Takeshita M, Morimoto Y, Okayama M, "Experimental Study of Rubber Flow Behavior in an Internal Mixer by Pressure Transducers," Paper Presented at the ACS Rubber Division, Houston, Texas, October (1983)

[6] Freakley PK, WanIdris WY, Rubber Chem. Technol., 52, 134 (1979)

[7] Asai T, Fukui T, Inoue K, Kuriyama M, "The Study of Distributive Performance of Rubber Mixing in an Internal Batch Mixer," Paper Presented at Int. Rubber Conf., Paris, June (1982)

[8] Min K, White JL, Rubber Chem. Technol., 58, 1024 (1985)

[9] Min K, Int. Polym. Process., 1, 179 (1987)

[10] Prager W, Appendix to article by J.T. Bergen in "Processing of Thermoplastic Materials," edited by E.C. Bernhardt, Reinhold, NY (1959)

[11] Bolen WR, Colwell RE, SPE J., 14(8), 24 (1958)

[12] Manas-Zloczower I, Nir A, Tadmor Z, Rubber Chem. Technol., 55, 1956 (1982)

[13] Manas-Zloczower I, "Flow and Mixing Mechanism in an Internal Mixer," Paper presented an International Rubber Seminar Akron, November (1988)

[14] Kim JK, White JL, Min K, Szydlowski W, Int. Polym. Process., 4, 9 (1989)

[15] Kim JK, "Analysis of Flow and Mixing in an Internal Mixer with Different Rotor Designs," Ph.D. Dissertation, (Univ. of Akron) (1989)

[16] Cross MM, Rheol. Acta, 18, 609 (1979)

[17] Booy ML, Polym. Eng. Sci., 21, 93 (1981)