Startseite Numerical Modeling of Bubble Growth in Microcellular Polypropylene Produced in a Core-Back Injection Process Using Chemical Blowing Agents
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Numerical Modeling of Bubble Growth in Microcellular Polypropylene Produced in a Core-Back Injection Process Using Chemical Blowing Agents

  • J. A. Reglero Ruiz , M. Vincent und J.-F. Agassant
Veröffentlicht/Copyright: 2. März 2016
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Abstract

A core-back polypropylene foaming injection process using chemical blowing agents (CBA) has been studied. First, injection tests were carried out with two different CBAs and the different morphologies of the obtained samples have been analyzed. Structural parameters such as cell density and average radius size were calculated. Then, a bubble growth model was developed to predict the foaming development during the process, controlled by the depressurization of the mold cavity during the short core-back opening coupled with the evolution of the temperature during core-back and subsequent cooling. A good agreement is found between theoretical predictions and experimental results.


*Correspondence address, Mail address: José Antonio Reglero Ruiz, MINES ParisTech-Centre de Mise en Forme des Matériaux (CEMEF), UMR CNRS 7635, 1, rue Claude Daunesse, CS 10207, 06904-Sophia Antipolis Cedex, France. E-mail:

References

Almanza, O., Rodriguez-Perez, M. A. and De Saja, J. A., “Measurement of the Thermal Diffusivity and Specific Heat of Polyethylene Foams Using the Transient Plane Source Technique”, Polym. Int., 53, 20382044 (2004) 10.1002/pi.1624Suche in Google Scholar

Amon, M., Denson, C. D., “A Study of the Dynamics of Foam Growth: Analysis of the Growth of Closely Spaced Spherical Bubbles”, Polym. Eng. Sci., 24, 10261034 (1984) 10.1002/pen.760241306Suche in Google Scholar

Behravesh, A. H., Park, C. B., Cheung, L. K. and Venter, R. D., “Extrusion of Polypropylene Foams with Hydrocerol and Isopentane”, J. Vinyl Add. Tech., 2, 349357 (1996) 10.1002/vnl.10153Suche in Google Scholar

Bikard, J., Bruchon, J., Coupez, T. and Vergnes, B., “Numerical Prediction of the Foam Structure of Polymeric Materials by Direct 3D Simulation of their Expansion by Chemical Reaction Based on a Multidomain Method”, J. Mater. Sci., 40, 58755881 (2005) 10.1007/s10853-005-5022-9Suche in Google Scholar

Bociaga, E., Palutkiewicz, P., “The Influence of Injection Molding Parameters and Blowing Agent Addition on Selected Properties, Surface State, and Structure of HDPE Parts”, Polym. Eng. Sci., 53, 780791 (2013) 10.1002/pen.23316Suche in Google Scholar

Bruchon, J., Coupez, T., “A Numerical Strategy for the Direct 3D Simulation of the Expansion of Bubbles into a Molten Polymer During a Foaming Process”, Int. J. Num. Methods Fluids, 57, 9771003 (2008) 10.1002/fld.1660Suche in Google Scholar

Cha, S. W., Yoon, J. D., “The Relationship of Mold Temperatures and Swirl Marks on the Surface of Microcellular Plastics”, Polym. Plast. Technol. Eng., 44, 795803 (2005) 10.1081/PTE-200060811Suche in Google Scholar

Colton, J. S., Suh, N. P., “Nucleation of Microcellular Foam: Theory and Practice”, Polym. Eng. Sci., 27, 500503 (1987) 10.1002/pen.760270702Suche in Google Scholar

Gibson, L. J., Ashby, M. F.: Cellular Solids: Structure and Properties, 2nd Edition, Pergamon Press, Oxford (1998)10.1017/CBO9781139878326Suche in Google Scholar

Guo, M. C., Santoni, A., Heuzey, M. C. and Carreau, P. J., “Occurrence of Surface Defects in TPO Injected Foam Parts”, J. Cell. Plast., 43, 273296 (2007) 10.1177/0021955X07077191Suche in Google Scholar

Ishikawa, T., Kentaro, T. and Ohshima, M., “Visual Observation and Numerical Studies of N2 vs. CO2 foaming Behavior in Core-Back Foam Injection MoldingPolym. Eng. Sci., 52, 875883 (1996) 10.1002/pen.22154Suche in Google Scholar

Joshi, K., Lee, J. G., Shafi, M. A. and Flumerfelt, R. W., “Prediction of Cellular Structure in Free Expansion of Viscoelastic Media”, J. Appl. Polym. Sci., 67, 13531368 (1998) 10.1002/(SICI)1097-4628(19980222)67:8<1353::AID-APP2>3.0.CO;2-DSuche in Google Scholar

Koopmans, R. J., Den Doelder, J. C. F. and Paquet, A. N., “Modeling Foam Growth in Thermoplastics”, Adv. Mater., 12, 18731880 (2000) 10.1002/1521-4095(200012)12:23<1873::AID-ADMA1873>3.0.CO;2-XSuche in Google Scholar

Lee, M., Park, C. B. and Tzoganakis, C., “Measurement and Modeling of PS/Supercritical CO2 Solution Viscosities”, Polym. Eng. Sci., 39, 99109 (1999) 10.1002/pen.11400Suche in Google Scholar

Lei, Z., Ohyabu, H., Sato, Y., Inomata, H. and Smith, R., “Solubility, Swelling Degree and Crystallinity of Carbon Dioxide-Polypropylene System”, J. Supercrit. Fluids, 40, 452461 (2007) 10.1016/j.supflu.2006.07.016Suche in Google Scholar

Medina, I., “Determination of Diffusion Coefficients for Supercritical Fluids”, J. Chromat., 1250, 124140 (2012) 10.1016/j.chroma.2012.04.052Suche in Google Scholar

Otsuki, Y., Kanai, T., “Numerical Simulation of Bubble Growth in Viscoelastic Fluid With Diffusion of Dissolved Foaming Agent”, Polym. Eng. Sci., 45, 12771288 (2005) 10.1002/pen.20395Suche in Google Scholar

Park, C. B., Suh, N. P.Filamentary Extrusion of Microcellular Polymers Using a Rapid Decompressive Element”, Polym. Eng. Sci., 36, 3448 (1996) 10.1002/pen.10382Suche in Google Scholar

Ruiz, J. A. Reglero, Vincent, M., Agassant, J.-F., Sadik, T., Pillon, C. and Carrot, C., “Polymer Foaming with Chemical Blowing Agents”, Polym. Eng. Sci., 55, 20182029 (2015) 10.1002/pen.24044Suche in Google Scholar

Ruiz, J. A. Reglero, Agassant, J.-F. and Vincent, M., “Morphological Analysis of Microcellular PP Produced in a Core-Back Injection Process Using Chemical Blowing Agents and Gas Counter Pressure”, Polym. Eng. Sci., 55, 24652473 (2015) 10.1002/pen.24136Suche in Google Scholar

Silva, L., Agassant, J. F. and Coupez, T., “Chapter No. 15 Three Dimensional Injection Molding Simulation”, in Injection Molding. Technology and Fundamentals, Kamal, M. R., Isayev, A., Liu, S. J. (Eds.), Hanser Publishers, Munich, p. 599651 (2009) 10.3139/9783446433731.015Suche in Google Scholar

Shafi, M. A., Lee, L. G. and Flumerfelt, R. W., “Prediction of Cellular Structure in Free Expansion Polymer Foam Processing”, Polym. Eng. Sci., 36, 19501959 (1996) 10.1002/pen.10591Suche in Google Scholar

Shafi, M. A., Flumerfelt, R. W., “Initial Bubble Growth in Polymer Foaming Processes”, Chem. Eng. Sci., 52, 627633 (1997) 10.1016/S0009-2509(96)00434-4Suche in Google Scholar

Souheng, W., “Surface and Interfacial Tensions of Polymer Melts”, J. Phys. Chem., 74, 632638 (1970)10.1021/j100698a026Suche in Google Scholar

Taki, K., “Experimental and Numerical Studies on the Effects of Pressure Release Rate on Number Density of Bubbles and Bubble Growth in a Polymeric Foaming Process”, Chem. Eng. Sci., 63, 36433653 (2008) 10.1016/j.ces.2008.04.037Suche in Google Scholar

Tomasko, D. L., Burley, A., Yeh, S.-K., Feng, L., Miyazono, K., Nirmal-Kumar, S., Kusaka, I. and Koelling, K., “Development of CO2 for Polymer Applications”, J. Supercrit. Fluids, 47, 493499 (2009) 10.1016/j.supflu.2008.10.018Suche in Google Scholar

Villamizar, C. A., Han, C. D., “Studies on Structural Foam Processing II: Bubble Dynamics in Foam Injection Molding”, Polym. Eng. Sci., 18, 699710 (1978) 10.1002/pen.760180905Suche in Google Scholar

Zhong, C., Masuoka, H., “Modeling of Gas Solubility in Polymers with Cubic Equations of State”, Ind. Eng. Chem. Res., 36, 25092513 (1997) 10.1021/ie970031bSuche in Google Scholar

Received: 2015-06-03
Accepted: 2015-10-28
Published Online: 2016-03-02
Published in Print: 2016-03-02

© 2016, Carl Hanser Verlag, Munich

Heruntergeladen am 21.9.2025 von https://www.degruyterbrill.com/document/doi/10.3139/217.3129/pdf
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