Abstract
The effects of the addition of different functionalized compatibilizers on toughness, morphology and rheological properties of a polypropylene (PP) – poly(ethylene terephthalate) (PET) (85–15 wt%) blend were studied. The three compatibilizers compared were: (Styrene Ethylene Butylene Styrene)-grafted-(glycidyl methacrylate); (Styrene Ethylene Butylene Styrene) – grafted – (maleic anhydryde); (polyolefin) – grafted – (glycidyl methacrylate), abbreviated to: SEBS-g-GMA, SEBS-g-MA and POE-g-GMA respectively. The effective grafting content was the same for all three compatibilizers. Before the comparison of the different compatibilizers was done, first the effects of three different processing temperatures and three different compatibilizer contents were investigated, based on the addition of SEBS-g-GMA. The compatibilization effect was significantly improved with an increase in processing temperature from 250 to 300 °C. The toughness was increased with almost a factor two and a decrease in the average domain size of the dispersed phase was observed. An increase in compatibilizer content from 0.25 to 2.5 wt% resulted in a finer dispersity as well as in a steep increase in toughness, which was noted to approach the brittle-to-ductile transition. The comparison of the three compatibilizers was subsequently done at the most promising processing temperature and content: 300 °C and 2.5 wt%. The results showed that the addition of SEBS-g-MA and POE-g-GMA had a less significant positive effect on the compatibilization compared to SEBS-g-GMA. The difference is attributed to a higher reactivity for GMA compared to MA and a higher possibility for migration towards the PP-PET interface for the SEBS chain compared to the POE chain.
References
Al-Abdulrazzak, S., Jabarin, S. A., “Processing Characteristics of Poly(ethylene terephthalate): Hydrolytic and Thermal Degradation”, Polym. Int., 51, 164–173 (2002) 10.1002/pi.813Search in Google Scholar
Assadi, R., Colin, X. and Verdu, J., “Irreversible Structural Changes during PET Recycling by Extrusion”, Polymer, 45, 4403–4412 (2004) 10.1016/j.polymer.2004.04.029Search in Google Scholar
Babaei, A., Arefazar, A., “Effect of Maleated Styrene/Ethylene-Co-Butylene/Styrene on the Dispersed Particles Size and Mechanical Properties of Polyamide 6/Poly(styrene-co-acrylonitrile)/Poly-(styrene-B-(ethylene-co-butylene)-B-styrene) Ternary Blends”, J. Macromol. Sci. Part B Phys., 53, 1406–1420 (2014) 10.1080/00222348.2014.895634Search in Google Scholar
Bacci, D., Toaldo, A. and Scaini, M., “A Mathematical Formulation of the Brittle/Ductile Transition of Impact Modified Polymers”, J. Macromol. Sci. Part B Phys., 52, 1438–1452 (2013) 10.1080/00222348.2013.769838Search in Google Scholar
Biresaw, G., Carriere, C. G. and Sammler, R. L., “Effect of Temperature and Molecular Weight on the Interfacial Tension of PS/PDMS Blends”, Rheol. Acta, 42, 142–147 (2003) 10.1007/s00397-002-0265-8Search in Google Scholar
Bucknall, C. B., Paul, D. R., “Notched Impact Behaviour of Polymer Blends: Part 2: Dependence of Critical Particle Size on Rubber Particle Volume Fraction”, Polymer, 54, 320–329 (2013) 10.1016/j.polymer.2012.11.019Search in Google Scholar
Delva, L., Ragaert, K., Allaer, K., Gaspar-Cunha, A., Degrieck, J. and Cardon, L., “Influence of Twin-Screw Configuration on the Mechanical and Morphological Properties of Polypropylene – Clay Composites”, Int. J. Mater. Prod. Technol., ??Volume, Pages?? (2015)10.1504/IJMPT.2016.073631Search in Google Scholar
Dhavalikar, R., YamaguchiM. and Xanthos, M., “Molecular and Structural Analysis of a Triepoxide-Modified Poly(ethylene terephthalate) from Rheological Data”. J. Polym. Sci., Part A: Polym. Chem., 41, 958–969 (2003) 10.1002/pola.10641Search in Google Scholar
Eastar Copolyesters Data Sheet, Eastman, ??Town, Country?? (2014)Search in Google Scholar
Enviromental Protection Agency (EPA), “Opportunities to Reduce Greenhouse Gas Emissions through Materials and Land Management Practices”, U.S. Environmental Protection Agency Office of Solid Waste and Emergency Response, ???Town, USA?? (2009)Search in Google Scholar
European Commision, “A European Strategy on Plastic Waste in the Environment”, Green Paper, European Commision, Brussels (2013)Search in Google Scholar
Fu, S.-Y., Feng, X.-Q., Lauke, B. and Mai, Y.-W., “Effects of Particle Size, Particle/Matrix Interface Adhesion and Particle Loading on Mechanical Properties of Particulate-Polymer Composites”, Composites Part B-Engineering, 39, 933–961 (2008)10.1016/j.compositesb.2008.01.002Search in Google Scholar
Greco, R.: Impact Modifiers: (1) Mechanisms and Applications in Thermoplastics. Plastic Additives, Pritchard, G. ???(Ed.)???, Chapman and Hall, London, p.375–385 (1998)10.1007/978-94-011-5862-6_41Search in Google Scholar
Heino, M., Kirjava, J., Hietaoja, P. and Seppala, J., “Compatibilization of Polyethylene Terephthalate/Polypropylene Blends with Styrene-Ethylene/Butylene-Styrene (SEBS) Block Copolymers”, J. Appl. Polym. Sci., 65, 241–249 (1997) 10.1002/(SICI)1097-4628(19970711)65:2<241::AID-APP4>3.0.CO;2-OSearch in Google Scholar
Higgins, J. S., Lipson, J. E. G. and White, R. P., “A Simple Approach to Polymer Mixture Miscibility”, Philos. Trans. R. Soc. London, Ser. A, 368, 1009–1025 (2010)Search in Google Scholar
Ihm, D., White, J., “Interfacial Tension of Polyethylene Polyethylene Terephthalate with Various Compatibilizing Agents”, J. Appl. Polym. Sci., 60, 1–7 (1996) 10.1002/(SICI)1097-4628(19960404)60:1<1::AID-APP1>3.0.CO;2-TSearch in Google Scholar
Jain, A., Pandey, G., Singh, A. K., Rajagopalan, V., Vaidyanathan, R. and Singh, R. P., “Fabrication of Structural Composites from Waste Carpet”, Adv. Polym. Technol., 31, 380–389 (2012) 10.1002/adv.20261Search in Google Scholar
Khonakdar, H. A., Jafari, S. H., Mirzadeh, H., Kalaee, M. R., Zare, D. and Saehb, M. R., “Rheology-Morphology Correlation in PET/PP Blends: Influence of Type of Compatibilizer”, J. Vinyl Add. Tech., 19, 25–30 (2013) 10.1002/vnl.20318Search in Google Scholar
Lei, Y., Wu, Q., Clemons, C. M. and Gu, W., “Phase Structure and Properties of Poly(ethylene terephthalate)/High-Density Polyethylene Based on Recycled Materials”, J. Appl. Polym. Sci., 113, 1710–1719 (2009) 10.1002/app.30178Search in Google Scholar
Lin, Y., Chen, H., Chan, C. and Wu, J., “Effects of Coating Amount and Particle Concentration on the Impact Toughness of Polypropylene/CaCo3 Nanocomposites”, Eur. Polym. J., 47, 294–304 (2011) 10.1016/j.eurpolymj.2010.12.004Search in Google Scholar
Papadopoulou, C., Kalfoglou, N., “Comparison of Compatibilizer Effectiveness for PET/PP Blends: Their Mechanical, Thermal and Morphology Characterization”, Polymer, 41, 2543–2555 (2000) 10.1016/S0032-3861(99)00442-5Search in Google Scholar
Paul, D. R., Barlow, J. W., “Polymer Blends (or Alloys)”, J. Macromol. Sci. Rev. Macromol. Chem. Phys., C18, 109–168 (1980) 10.1080/00222358008080917Search in Google Scholar
Plastics Europe, “Plastics – the Facts 2014/2015. An Analysis of European Plastics Production, Demand and Waste Data”, Plastics Europe, Brussels (2015)Search in Google Scholar
Plastics Europe, EuPC, EuPR and EPRO, “Plastics – the Facts 2011. An Analysis of European Plastics Production, Demand and Recovery for 2010”, Plastics Europe, Brussels (2011)Search in Google Scholar
Pracella, M., Chionna, D., “Functionalization of Styrene-Olefin Block Copolymers by Melt Radical Grafting of Glycidyl Methacrylate and Reactive Blending with PET”, Macromol. Symp., 218, 173–182 (2001) 10.1002/masy.200451418Search in Google Scholar
Pracella, M., Rolla, L., Chionna, D. and Galeski, A., “Compatibilization and Properties of Poly(ethylene terephthalate)/Polyethylene Blends Based on Recycled Materials”, Macromol. Chem. Phys., 203, 1473–1485 (2002) 10.1002/1521-3935(200207)203:10/11<1473::AID-MACP1473>3.0.CO;2-4Search in Google Scholar
Premphet, K., Paecharoenchai, W., “Polypropylene/Metallocene Ethylene-Octene Copolymer Blends with a Bimodal Particle Size Distribution: Mechanical Properties and their Controlling Factors”, J. Appl. Polym. Sci., 85, 2412–2418 (2002) 10.1002/app.10886Search in Google Scholar
Robeson, L., “Chapter 6 Properties of Polymer Blends”, in Polymer Blends – A Comprehensive Review, Hanser, Munich (2007) 10.3139/9783446436503Search in Google Scholar
Ryan, A., “Polymer Science – Designer Polymer Blends”, Nat. Mater., 1, 8–10 (2002) 10.1038/nmat720Search in Google Scholar
Sun, S., Zhang, M., Zhang, H. and Zhang, X., “Polylactide Toughening with Epoxy-Functionalized Grafted Acrylonitrile-Butadiene-Styrene Particles”, J. Appl. Polym. Sci., 122, 2992–2999 (2011) 10.1002/app.34111Search in Google Scholar
Sun, Y., Hu, G., Lambla, M. and Kotlar, H., “In Situ Compatibilization of Polypropylene and Poly(butylene terephthalate) Polymer Blends by one-Step Reactive Extrusion”, Polymer, 37, 4119–4127 (1996) 10.1016/0032-3861(96)00229-7Search in Google Scholar
Van Krevelen, D., Te Nijenhuis, K.: Interfacial Energy Properties. Properties of Polymers, Elsevier, Amsterdam (2008)10.1016/B978-0-08-054819-7.00008-XSearch in Google Scholar
Wu, S.: Polymer Interface and Adhesion, Marcel Dekker, New York (1982)Search in Google Scholar
Wu, S. H., “Formation of Dispersed Phase in Incompatible Polymer Blends – Interfacial and Rheological Effects”, Polym. Eng. Sci., 27, 335–343 (1987) 10.1002/pen.760270506Search in Google Scholar
Yildirim, E., Yurtsever, M., “A Comparative Study on the Efficiencies of Polyethylene Compatibilizers by Using Theoretical Methods”, J. Polym. Res., 19 (2012)10.1007/s10965-011-9771-7Search in Google Scholar
Zhang, L., Li, C. and Huang, R., “Toughness Mechanism in Polypropylene Composites: Polypropylene Toughened with Elastomer and Calcium Carbonate”, J. Polym. Sci. Part B: Polym. Phys., 42, 1656–1662 (2004) 10.1002/polb.20035Search in Google Scholar
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