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Vincent R, Langlotz M, Düngen M. Viscosity measurement of polypropylene loaded with blowing agents (propane and carbon dioxide) by a novel inline method. J CELL PLAST 2019. [DOI: 10.1177/0021955x19864400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Decreased viscosity due to the influence of blowing agent in thermoplastic polymer melts is a key issue for understanding the process of foam extrusion. In a process for direct foam extrusion, a novel approach for inline viscosity measurement of single-phase systems in single screw extruders is used to experimentally evaluate a viscosity decrease. Two blowing agents (propane and carbon dioxide) are tested for their effect on the viscosity of a polypropylene melt. While mass fractions of blowing agent below [Formula: see text] show little to no effect in regard to viscosity reduction compared to a pure polymer melt, a mass fraction of [Formula: see text] already results in significantly decreased viscosity values. While melt temperature influences the viscosity of the polymer melt, measurements show no significant additional effect in regard to a lowered viscosity of a single-phase system of polymer and fully dissolved blowing agent.
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Affiliation(s)
- Raphael Vincent
- Department of Mechanical Engineering, Plastics Technology Group, Technical University Ilmenau, Thuringia, Germany
| | - Martin Langlotz
- Department of Mechanical Engineering, Plastics Technology Group, Technical University Ilmenau, Thuringia, Germany
| | - Matthias Düngen
- Department of Mechanical Engineering, Plastics Technology Group, Technical University Ilmenau, Thuringia, Germany
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Wan C, Sun G, Liu T, Esseghir M, Zhao L, Yuan W. Rheological properties of HDPE and LDPE at the low-frequency range under supercritical CO2. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2016.12.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Matsumiya Y, Inoue T, Iwashige T, Watanabe H. Dielectric Relaxation of Polymer/Carbon Dioxide Systems. Macromolecules 2009. [DOI: 10.1021/ma900571d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yumi Matsumiya
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Tadashi Inoue
- Department of Macromolecular Science, Graduate school of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Tomohito Iwashige
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hiroshi Watanabe
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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Wingert MJ, Shukla S, Koelling KW, Tomasko DL, Lee LJ. Shear Viscosity of CO2-Plasticized Polystyrene Under High Static Pressures. Ind Eng Chem Res 2009. [DOI: 10.1021/ie800896r] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Maxwell J. Wingert
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210
| | - Shunahshep Shukla
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210
| | - Kurt W. Koelling
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210
| | - David L. Tomasko
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210
| | - L. James Lee
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210
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