INFLUENCE OF HYBRID FILLING WITH SHORT GLASS FIBERS AND THERMALLY EXPANDED GRAPHITE ON THE STRUCTURE AND PROPERTIES POLYETHYLENETEREPHTALATE
https://doi.org/10.29235/1561-8323-2018-62-1-120-128
Abstract
The effect of short glass fibers (GFs) and thermally expanded graphite (TEG), added to polyethyleneterephtalate (PET), on mechanical, including dynamical mechanical, and rheological properties, as well as the structural features of the produced composites is studied. Compounding with the PET melt is realized by reactive extrusion using a co-rotating twin screw extruder-reactor with L / D = 40. Analyzed composites contained from 15 to 60 wt. % of GFs, and the TEG concentration was 0.5 and 3.0 wt. It is found that hybrid filling of PET results in a synergetic increase of the tensile modulus of the composites reaching the values more than 22 GPa, as well as that of the dynamic shear modulus in a wide temperature range. Adding TEG into PET/GF composites increases the degree of binder crystallinity. An effect of an anomalous decrease in the intrinsic viscosity of PET solutions and an increase in the melt flow index of the melt composites observed at higher GF concentrations is attributed to a deeper degradation of polymer.
About the Authors
Vladislav V. Dubrovsky
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Researcher
32-а, Kirov Str., Gomel
Vladimir N. Aderikha
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Ph. D. (Chemistry), Head of the Department
32-а, Kirov Str., Gomel
Vitaly A. Shapovalov
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Researcher
32-а, Kirov Str., Gomel
Stepan S. Pesetskii
V. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Corresponding Member, D. Sc. (Engineering), Professor, Head of the Department
32-а, Kirov Str., Gomel
References
1. Polyethylenterephthalate 2016: Castles in the sand. Available at: https://plastinfo.ru/information/articles/557/ (accessed 20 October 2017) (in Russian).
2. Cilleruelo L., Lafranche E., Krawczak P., Pardo P., Lucas P. Injection moulding of long glass fiber reinforced poly(ethylene terephthalate): Influence of carbon black and nucleating agents on impact properties. Express Polymer Letters, 2012, vol. 6, no. 9, pp. 706–718. doi.org/10.3144/expresspolymlett.2012.76
3. Dubrovsky V. V., Koval V. N., Bogdanovich S. P., Peseckii S. S. On influence of short glass fibers on molecular and structural parameters, mechanical and rheological properties of polyethylene terephthalate. Materialy. Tehnologii. Instrumenty = Materials. Technologies. Tools, 2013, vol. 18, no. 4, pp. 50–57 (in Russian).
4. Pesetskii S. S., Shevchenko V. V., Dubrovsky V. V. Reactive compatibilization in technology of poly(alkylene terephthalate)–based composites: polyester blends, short fiber-filled materials, and nanocomposites. Friedrich K., Breuer U., ed. Multifunctionality of polymer Composites, Oxford, Elsievier, 2015, ch. 9, pp. 302–337. doi.org/10.1016/b978-0-323-26434- 1.00009-x
5. Awaja F., Pavel D. Recycling of PET. European Polymer Journal, 2005, vol. 41, no. 7, pp. 1453–1477. doi.org/10.1016/j. eurpolymj.2005.02.005
6. Rezaeian I., Jafari S. H., Zahedi P., Nouri S. An investigation on the rheology, morphology, thermal and mechanical properties of recycled poly (ethylene terephthalate) reinforced with modified short glass fibers. Polymer Composites, 2009, vol. 30, no. 7, pp. 993–999. doi.org/10.1002/pc.20647
7. Pegoretti A., Penati A. Recycled poly(ethyleneterephthalate) and its short glass fibres composites: effect of hydrothermal aging on the thermo-mechanical behavior. Polymer, 2004, vol. 45, no. 23, pp. 7995–8004. doi.org/10.1016/j.polymer.2004.09.034
8. Pesetskii S. S. Hibrid micro- and nanofilling of plastics: synergism of reinforcing. Polimernye materialy i tehnologii = Polymer materials and Technologies, 2015, vol. 1, no. 2, pp. 5 (in Russian).
9. Cho J. W., Paul D. R. Nylon 6 nanocomposites by melt compounding. Polymer, 2001, vol. 42, no. 3, pp. 1083–1094. doi. org/10.1016/s0032-3861(00)00380-3
10. Pedrazzoli D., Pegoretti A. Silica nanoparticles as coupling agents for polypropylene/glass composites. Composites Science and Technology, 2013, vol. 76, pp. 77–83. doi.org/10.1016/j.compscitech.2012.12.016
11. Pesetskii S. S., Bogdanovich S. P., Sodyleva T. M. Polyamide 6 reinforcement by hybrid short basalt fiber and organoclay filling. Doklady Natsional’noi akademii nauk Belarusi = Doklady of the National Academy of Sciences of Belarus, 2017, vol. 61, no. 2, pp. 74–83 (in Russian).
12. Pesetskii S. S., Bogdanovich S. P., Dubrovsky V. V., Sodyleva T. M., Aderiha V. N., Usova V. N. Morphology and properties of PA6 hybrid composites filled with short carbon fibers and organoclay. Polimernye materialy i tehnologii = Polymer materials and Technologies, 2016, vol. 2, no. 3, pp. 45–57 (in Russian).
13. Asadi A., Miller M., Moon R. J., Kalaitzidou K. Improving the interfacial and mechanical properties of short glass fiber/ epoxy composites by coating the glass fibers with cellylose nanocrystals. Express Polymer Letters, 2016, vol. 10, no. 7, pp. 587–597. doi.org/10.3144/expresspolymlett.2016.54
14. Munoz-Vulez M. F., Valadez-Gonzalez A., Herrera-Franco P. J. Effect of fiber surface treatment on the incorporation of carbon nanotubes and on the micromechanical properties of a single-carbon fiber-epoxy matrix composite. Express Polymer Letters, 2017, vol. 11, no. 9, pp. 704–718. doi.org/10.3144/expresspolymlett.2017.68
15. Wunderlich B. Equilibrium melting of flexible linear macromolecules. Polymer Engineering and Science, 1978, vol. 18, no. 6, pp. 431–436. doi.org/10.1002/pen.760180603
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