Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter March 11, 2015

Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends

  • K. Dobrovszky and F. Ronkay


The effects of additive styrene/ethylene-butylene/styrene copolymer grafted with maleic anhydride (SEBS-g-MA) were investigated on the rheology, morphology and mechanical properties of a polyethylene terephthalate (PET)/high density polyethylene (HDPE) blend. The ratio of the two components was changed in small increments to track phase inversion. The rheology measurements show that SEBS-g-MA acts differently on HDPE and PET, as different morphologies are formed due to viscosity ratio change. With the help of electron microscopy various phases after extrusion and after injection molding were revealed and identified. Because of the high viscosity of HDPE the co-continuous morphology was immediately formed when PET reached 30 vol%. The range of the co-continuous structure of the blend was wider when SEBS-g-MA was added, and the elongation at break also improved as additive content increased, without a significant strength decrease. The divergence of the mechanical properties from the theoretical value, i.e. the value determined by the mixing rule, can be explained by the changing phase structure.

* Mail address: Ferenc Ronkay, Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary. E-mail:


Aglietto, M., Coltelli, M.-B., Savi, S., Lochiatto, F., Ciardelli, F. and Giani, M., “Postconsumer Polyethylene Terephthalate (PET)/Polyolefin Blends through Reactive Processing”, J. Mater. Cycles Waste Manage., 6, 1319 (2004) 10.1007/S10163-003-0100-ZSearch in Google Scholar

Bayareh, M., Mortazavi, S., “Binary Collision of Drops in Simple Shear Flow at Finite Reynolds Numbers: Geometry and Viscosity Ratio Effects”, Adv. Eng. Softw., 42, 604611 (2011) 10.1016/J.Advengsoft.2011.04.010Search in Google Scholar

Canto, L. B., “On the Coarsening of the Phase Morphology of PP/EVA Blends during Compounding in a Twin Screw Extruder”, Polym. Test., 34, 175182 (2014) 10.1016/J.Polymertesting.2014.01.012Search in Google Scholar

Carté, T. L., Moet, A., “Morphological Origin of Super Toughness in Poly(ethylene terephthalate)/Polyethylene Blends”, J. Appl. Polym. Sci.48, 611624 (1993) 10.1002/App.1993.070480405Search in Google Scholar

Filippone, G., Netti, P. A. and Acerno, D., “Microstructural Evolutions of LDPE/PA6 Blends by Rheological and Rheo-Optical Analyses: Influence of Flow and Compatibilizer on Break-Up and Coalescence Processes”, Polymer, 48, 564573 (2007) 10.1016/J.Polymer.2006.11.050Search in Google Scholar

Guido, S., “Shear-Induced Droplet Deformation: Effects of Confined Geometry and Viscoelasticity”, Curr. Opin. Colloid Interface Sci., 16, 6170 (2011) 10.1016/J.Cocis.2010.12.001Search in Google Scholar

Ihm, D. J., WhiteJ. L., “Interfacial Tension of Polyethylene/Polyethylene Terephthalate with Various Compatibilizing Agents”, J. Appl. Polym. Sci., 60, 17 (1996) 10.1002/(SICI)1097-4628(19960404)60:1<1::AID-APP1>3.0.CO;2-TSearch in Google Scholar

Jarukumjorn, K., Chareunkvun, S., “Compatibilization of Recycled High Density Polyethylene (HDPE)/Polyethylene Terephtalate (PET) Blends”, Suranaree J. Sci. Technol., 14, 18 (2006)Search in Google Scholar

Jánoki, G., Ronkay, F., “Morphology and Mechanical Properties of Immiscible Polymer Blends”, Journal of Material Testers Magazine, 20, 1621 (2010)Search in Google Scholar

Kalfoglou, N. K., Skafidas, D. S. and Kallitsis, J. K., “Comparsion of Compatibilizer Effectiveness for PET/HDPE Blends”, Polymer, 36, 44534462 (1995) 10.1016/0032-3861(95)96853-ZSearch in Google Scholar

Lei, Y., Wu, Q. and Zhang, Q., “Morphology and Properties of Microfibrillar Composites Based on Recycled Poly(ethylene terephthalate) and High Density Polyethylene”, Composites Part A, 40, 904912 (2009) 10.1016/J.Compositesa.2009.04.017Search in Google Scholar

Lei, Y., Wu, Q., “High Density Polyethylene and Poly(ethylene terephthalate) in situ Sub-Micro-Fibril Blends as a Matrix for Wood Plastic Composites”, Composites Part A, 43, 7338 (2012) 10.1016/J.Compositesa.2011.09.012Search in Google Scholar

Lemenand, T., Dupont, P., Della Valle, D. and Peerhossaini, H., “Comparative Efficiency of Shear, Elongation and Turbulent Droplet Breakup Mechanisms: Review and Application”, Chem. Eng. Res. Des., 91, 25872600 (2013) 10.1016/J.Cherd.2013.03.017Search in Google Scholar

Li, Z., Liu, C. M., Liu, H. L., Wang, K. and Fu, Q., “Non-Uniform Dispersion of Toughening Agents and its Influence on the Mechanical Properties of Polypropylene”, Express Polym. Lett., 8, 232242 (2014) 10.3144/Expresspolymlett.2014.27Search in Google Scholar

Mallette, J. G., Quej, L. M., Marquez, A. and Manero, O., “Carbon Black-Filled PET/HDPE Blends: Effect of the CB Structure on Rheological and Electric Properties”, J. Appl. Polym. Sci., 81, 562569 (2001) 10.1002/App.1471Search in Google Scholar

Marosi, G. J., “Chapter No. 4 Interfaces in Multiphase Polymer Systems”, in Handbook of Multiphase Polymer Systems, Boudenne, L., Ibos, L., Candau, Y., Thomas, S. (Eds.), John Wiley & Sons, Chichester, p. 81112 (2011) 10.1002/9781119972020.ch4 Search in Google Scholar

Pawlak, A., Morawiec, J. and Galeski, A., “Compatibilization, Processing and Properties of Post-Consumer PET/Polyolefin Blends”, Polimery, 47, 491499 (2002)10.14314/polimery.2002.491Search in Google Scholar

Perugini, F., Mastellone, M. L. and Arena, U., “A Life Cycle Assessment of Mechanical and Feedstock Recycling Options for Management of Plastics Packaging Wastes”, Environ. Prog., 24, 137154 (2005) 10.1002/Ep.10078Search in Google Scholar

PlasticsEurope: Plastics – the Facts 2013, Belgium (2013)Search in Google Scholar

Pluta, M., Bartczak, Z., Pawlak, A., Galeski, A. and Pracella, M., “Phase Structure and Viscoelastic Properties of Compatibilized Blends of PET and HDPE Recyclates”, J. Appl. Polym. Sci., 82, 14231436 (2001) 10.1002/App.1980Search in Google Scholar

Pracella, M., Pazzagli, F. and Galeski, A., “Reactive Compatibilization and Properties of Recycled Poly(ethylene terephtalate)/Polyethylene Blends”, Polym. Bull., 48, 6774 (2002) 10.1007/S00289-002-0001-7Search in Google Scholar

Ravazi, S., Shojaei, A. and Bagheri, R., “Binary and Ternary Blends of High-Density Polyethylene with Poly(ethylene terephthalate) and Polystyrene Based on Recycled Materials”, Polym. Adv. Technol., 22, 690702 (2011) 10.1002/Pat.1567Search in Google Scholar

Scheirs, J.: Polymer Recycling Science, Technology, and Applications, Wiley, New York (1998)Search in Google Scholar

Tanrattanakul, V., Hiltner, A., Baer, E., Perkins, W. G., Massey, F. L. and Moet, A., “Toughening PET by Blending with a Functionalized SEBS Block Copolymer”, Polymer, 38, 21912200 (1997) 10.1016/S0032-3861(96)00774-4Search in Google Scholar

Torres, N., Robin, J. J. and Boutevin, B., “Study of Compatibilization of HDPE–PET Blends by Adding Grafted or Statistical Copolymers”, J. Appl. Polym. Sci., 81, 23772386 (2001) 10.1002/App.1678Search in Google Scholar

Utracki, L. A.: Polymer Blends Handbook.Kluwer Academic Publishers, Dordrecht (2002)10.1007/0-306-48244-4Search in Google Scholar

Yu, Z.-Z., Yang, M.-S., Dai, S.-C. and MaiY.-W., “Toughening of Recycled Poly(ethylene terephthalate) with a Maleic Anhydride Grafted SEBS Triblock Copolymer”, J. Appl. Polym. Sci., 93, 14621472 (2004) 10.1002/App.20592Search in Google Scholar

Zenkiewich, M., Kurcok, M., “Effects of Compatibilizers and Electron Radiation on Thermomechanical Properties of Composites Consisting of Five Recycled Polymers”, Polym. Test., 27, 420427 (2008) 10.1016/J.Polymertesting.2008.01.002Search in Google Scholar

Zhang, Q., Yang, H. and Fu, Q., “Kinetics-Controlled Compatibilization of Immiscible Polypropylene/Polystyrene Blends Using Nano-SiO2 Particles”, Polymer, 45, 19131922 (2004) 10.1016/J.Polymer.2004.01.037Search in Google Scholar

Received: 2014-05-19
Accepted: 2014-10-03
Published Online: 2015-03-11
Published in Print: 2015-03-02

© 2015, Carl Hanser Verlag, Munich

Downloaded on 10.6.2023 from
Scroll to top button