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Foam extrusion behavior, morphology, and physical foam properties of organic cellulose ester

Published online by Cambridge University Press:  31 May 2013

Stefan Zepnik ,
Sven Hendriks ,
Stephan Kabasci  and
Hans-Joachim Radusch
Stefan Zepnik*
Affiliation:
Department Bio-based Plastics, Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Straße 3, 46047 Oberhausen, Germany; and Martin Luther University Halle-Wittenberg, Center of Engineering Sciences, Polymer Technology, 06099 Halle, Germany
Sven Hendriks
Affiliation:
Department Extrusion, RWTH Aachen University, Institute of Plastics Processing IKV, 52056 Aachen, Germany
Stephan Kabasci
Affiliation:
Department Bio-based Plastics, Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Straße 3, 46047 Oberhausen, Germany
Hans-Joachim Radusch
Affiliation:
Department Polymer Technology, Martin Luther University Halle-Wittenberg, Center of Engineering Sciences, 06099 Halle, Germany
*
a)Address all correspondence to this author. e-mail: stefan.zepnik@umsicht.fraunhofer.de
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Abstract

This paper presents recent results of foam extrusion of thermoplastic cellulose acetate (CA) using HFO 1234ze as low global warming blowing agent and talc as nucleating agent. Foam extrusion behavior, physical foam properties, and foam morphologies were studied in detail with respect to blowing agent concentration and talc content. Depending on these parameters, thermoplastic CA exhibits excellent foam extrusion performance with good expansion behavior at the die. Talc as nucleating agent results in homogeneous fine foam morphologies with closed cells [i.e., Fig. 3(3)]. Depending on the blowing agent content and talc content, average cell size ranges from 1 to 0.12 mm and foam density ranges between 100 and 400 kg/m3.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2394 - 2400
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

Bergamaschi, E., Smargiassi, A., Mutti, A., Franchini, I., and Lucchini, R.: Immunological changes among workers occupationally exposed to styrene. Int. Arch. Occup. Environ. Health 67, 165 (1995).CrossRefGoogle ScholarPubMed
Cherry, N. and Gautrin, D.: Neurotoxic effects of styrene: Further evidence. Br. J. Ind. Med. 47, 29 (1990).Google ScholarPubMed
Vachon, C.: Research on alternative blowing agents, in Thermoplastic Foam Processing: Principles and Development, edited by Gendron, R. (CRC Press, Boca Raton, FL, 2005), pp. 139–191.Google Scholar
Naguib, H.E., Park, C.B., Lee, P.C., and Xu, D.: A study on the foaming behaviors of PP resins with talc as nucleating agent. J. Polym. Eng. 26, 565 (2006).CrossRefGoogle Scholar
Vo, C.V. and Paquet, A.N.: An evaluation of the thermal conductivity of extruded polystyrene foam blown with HFC-134a or HCFC-142b. J. Cell. Plast. 40, 205 (2004).CrossRefGoogle Scholar
Kaewmesri, W., Lee, P.C., Park, C.B., and Pumchusak, J.: Effects of CO2 and talc contents on foaming behavior of recyclable high-melt-strength PP. J. Cell. Plast. 42, 405 (2006).CrossRefGoogle Scholar
Daigneault, L.E. and Gendron, R.: Blends of CO2 and 2-ethyl hexanol as replacement foaming agents for extruded polystyrene. J. Cell. Plast. 37, 262 (2001).CrossRefGoogle Scholar
Park, C.B., Behravesh, A.H., and Venter, R.D.: Low density microcellular foam processing in extrusion using CO2. Polym. Eng. Sci. 38, 1812 (1998).CrossRefGoogle Scholar
Lee, S-T., Park, C.B., and Ramesh, N.S.: Polymeric Foams: Science and Technology (CRC Press, Boca Raton, FL, 2007), pp. 131–204.Google Scholar
Pilla, S., Kim, S.G., Auer, G.K., Gong, S., and Park, C.B.: Microcellular extrusion-foaming of polylactide with chain-extender. Polym. Eng. Sci. 49, 1653 (2009).CrossRefGoogle Scholar
Zhang, J-F. and Sun, X.: Biodegradable foams of poly(lactic acid)/starch. I. Extrusion condition and cellular size distribution. J. Appl. Polym. Sci. 106, 857 (2007).CrossRefGoogle Scholar
Richards, E., Rizvi, R., Chow, A., and Naguib, H.E.: Biodegradable composite foams of PLA and PHBV using subcritical CO2. J. Polym. Environ. 16, 258 (2008).CrossRefGoogle Scholar
Deanin, R.D. and Berner, T.J.: Cellulose acetate structural foam. J. Vinyl Add. Tech. 2, 263 (1996).CrossRefGoogle Scholar
Willett, J.L. and Shogren, R.L.: Processing and properties of extruded starch/polymer foams. Polymer 43, 5935 (2002).CrossRefGoogle Scholar
Gibson, L.J. and Ashby, M.F.: Cellular Solids: Structure and Properties, 2nd ed. (Cambridge University Press, Cambridge, England, 1997), p. 15.CrossRefGoogle Scholar
Peters, R.: Foam structure analysis with digital image processing. Ph.D. Thesis, RWTH Aachen University, Aachen, Germany, 2003.Google Scholar
Rodrigue, D., Souici, S., and Twite-Kabamba, E.: Effect of wood powder on polymer foam nucleation. J. Vinyl Add. Tech. 12, 19 (2006).CrossRefGoogle Scholar
Naguib, H.E., Park, C.B., and Lee, P.C.: Effect of talc content on the volume expansion of extruded PP foams. J. Cell. Plast. 39, 499 (2003).CrossRefGoogle Scholar
Michaeli, W. and Schuhmacher, H.: The effect of talcum particle diameter on the structure of PE foam sheets, in Proceedings of 8th International Conference on Blowing Agents and Foaming Processes 2006 Munich, Germany, 2006, Paper 13.Google Scholar
Heinz, R.: Process optimization for the extrusion of thermoplastic foams using CO2 as a blowing agent. Ph.D. Thesis, RWTH Aachen University, Aachen, Germany, 2002.Google Scholar
Ito, Y., Yamashita, M., and Okamoto, M.: Foam processing and cellular structure of polycarbonate-based nanocomposites. Macromol. Mater. Eng. 291, 773 (2006).CrossRefGoogle Scholar
Ema, Y., Ikeya, M., and Okamoto, M.: Foam processing and cellular structure of polylactide-based nanocomposites. Polymer 47, 5350 (2006).CrossRefGoogle Scholar