Properties of Calcium Carbonate-Filled Polyethylene Bottles Produced from Extrusion Blow Molding Process
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Abstract
This research concerns in property testing of CaCO3-filled high density polyethylene (HDPE) for blow molding applications. Both uncoated and stearic acid (SA) coated CaCO3 grades were used at 20%wt filler loading whereas maleic anhydride grafted high density polyethylene (HDPE-g-MA) was used as a compatibilizer (at 0.5-4.0% contents). All compounds were prepared using a twin-screw extruder and an extrusion blow molding machine was used for bottle production. It was found that an addition of CaCP3 increased the compound viscosity, however, the viscosity did not change when SA or HDPE-g-MA was present. From the below molding process, all the compounds had similar volumetric output rate. The bottle weight of the unfilled HDPE was less than that CaCO3-filled HDPE, but the bottle thickness gave opposite results. An incorporation of CaCO3 fillers in HDPE decreased tensile yield strength, elongation at break and impact strength, but these properties could be improved by an addition of SA or HDPE-g-MA. Modulus of the CaCO3-filled HDPE was greater than that of the unfilled one, but decreased when having HDPE-g-MA. It could be possible to use 20%wt CaCO3-filled HDPE compounds for the extrusion blow molding applications since the deleterious effect of CaCO3 incorporation could be reduced by an addition of SA or HDPE-g-MA.
Keywords: Calcium carbonate, Polyethylene, Blow molding process, Mechanical properties
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References
[2] Gächter, R., and Müller, H. 1993 Plastics Additives Handbook. 4 th Edition, Munich, Hanser Publishers.
[3] Maiti S.N. and Jeyakumar R. 1990 Mechanical and Melt Rheology Properties of CaCO3-filled Polyethylene, Journal of Polymer Materials, 7, 29-34.
[4] Schreiber H.P., Viau J.M., Fetoui A., and Zhuo D. 1990 Some Properties of Polyethylene Compounds with Surface-Modified Fillers, Polymer Engineering and Science, 30(5), 263-269.
[5] Jumpa S. 1998 Elongational Rheometry and Processing of Filled Polyethylene Melts, Ph.D. Thesis, Institute of Polymer Technology and Material Engineering, Loughborough University, Loughborough, UK.
[6] Premphet K. and Horanont P. 2001 Improving Performance of Polypropylene Through Combined Use of Calcium Carbonate and Metallocence-Produced Impact Modifier, Polymer Plastics Technology and Engineering, 40(3), 235-247.
[7] Zuiderduim W.C.J., Westzaan C., Hue’tink J. and Gaymans R.J. 2003 Toughening of Polypropylene with Calcium Carbonate Particle, Polymer, 44, 261-275.
[8] Papirer E., Schultz J., and Turchi C. 1984 Surface Properties of Calcium Carbonate Filler Treated with Stearic Acid, European Polymer Journal, 20(12), 1155-1158.
[9] Wang Q., Chen H., and Liu Y. 2002 LDPE-g-MAH Prepared Though Solid-Phase Mechanochemistry and Its Compatibilizing Effects on HDPE/CaCO3, Polymer Plastics Technology and Engineering, 41(2), 215-228.
[10] Premphet-Sirisinha K. and Preechachon I. 2003 Changes in Morphology and Properties by Grafting Reaction in PP/EOR/CaCO3 Ternary Composites, Journal of Applied Polymer Science, 89, 3557-3562.
[11] Sahnoune F., Lopez J.m., and Crespy A. 2003 Improvement of the Mechanical Properties of an HDPE/PS blend by Compatibilization and Incorporation CaCO3, Polymer Engineering and Science, 43, 647-660.
[12] Han C.D. 1974 Rheological Properties of Calcium Carbonate-Filled Polypropylene Melts, Journal of Applied Polymer Science, 18, 821-829.
[13] Suetsugu Y. and White J.L. 1983 The Influence of Particle Size and Surface Coating of Calcium Carbonate on the Rheological Properties of Its Suspensions in Molten Polystyrene, Journal of Applied Polymer Science, 28, 1481-1501.
[14] Santelices A. 1994 Melt Rheology Properties of CaCO3-filled Polyethylene and Its Processing, ANTEC Proceedings, 3591-3595.
[15] Haworth, B. and Jumpa, S. 1999 Extensional Flow Characterization and Extrusion Blow Molding of high Density Polyethylene Modified by Calcium Carbonate, Plastics Rubber and Composites, 28(8), 363-378.
[16] Birley, A.W., Haworth, B. and Batchelor, J. 1992 Physics of Plastics: Processing, Properties and Materials Engineering, Munich, Hanser.
[17] Fisher, E.G. 1971 Blow Moulding of Plastics. London, Illiffe.
[18] Haworth, B. and Jumpa, S. 1998 Understanding Elongational Flow Properties of Filled Polymer Melts for Plastics Blow Molding, Food, Cosmetics and Drug Packaging, 21(11), 213-219.
[19] Rothon, R.N. 1995 Ed. Particulate-filled Polymer Composites. UK, Longman.