Reciklált polimpropilén nanokompozitok idő és hőmérsékletfüggő mechanikai tulajdonságainak vizsgálata
Time and temperature dependent mechanical properties of recycled polypropylene nanocomposites
Keywords:
PP, MWCNT, recyclation, creep, reinforcement, /, újrafeldolgozás, kúszásAbstract
In this study, the effects of multi-walled carbon nanotube (MWCNT) content and recyclation on the mechanical properties and time and temperature dependent mechanical properties of polypropylene homopolymer (PP) were investigated. The nanocomposites and their reciclates were prepared using twin-screw extruders with 0.3, 0.5 and 1 m/m% MWCNT content and test specimens were injection moulded to perform the tests.
The results of the mechanical test showed that the PPH/MWCNT reciklatelets exhibited an increase in elastic modulus of ⁓4% at 0.3 m/m%, ⁓9% at 0.5 m/m% and ⁓11% at 1 m/m% reinforcement, compared to the unfilled PPH base material. A negligible increase was observed in the stress values associated with the neck formation A significant decrease was observed in the tensile elongation values.
Based on the dynamic mechanical results, it was found that the incorporation of MWCNTs improves the storage modulus values over the whole measurement range.
From the creep to failure results, it was found that due to the favourable mechanical properties of MWCNTs and their effect on stiffness, the creep tendency of composites and their reciklazation was significantly reduced.
Kivonat
Ebben a tanulmányban a többfalú szén nanocsövek (MWCNT) tartalmának, valamint a reciklálás hatását vizsgáltuk a polipropilén homopolimer (PP) mechanikai, valamint idő és hőmérséklet függő mechanikai tulajdonságaira. A nanokompozitokat valamint ezek reciklátumait ikercsigás extrúder segítségével állítottuk elő 0,3, 0,5 valamint 1 m/m% MWCNT tartalom mellett majd a vizsgálatok elvégzéséhez próbatesteket fröccsöntöttünk.
A mechanikai vizsgálat eredményei azt mutatták, hogya PPH/MWCNT reciklátumok 0,3 m/m%-nál ⁓4%, 0,5 m/m%-nál ⁓9%, míg 1 m/m% erősítés esetében ⁓11%-os rugalmassági modulus növekedést mutatnak, a töltetlen PPH alapanyaghoz hasonlítva. A nyakképződéshez tartozó feszültségi értékekben elhanyagolható növekedést tapasztaltam A szakadási nyúlás értékeiben jelentős csökkenést tapasztaltunk
A dinamikus mechanikai eredmények alapján megállapítottuk, hogy az MWCNT-k beépítése javítja a tárolási modulus értékétkét a teljes mérési tartományban.
A tönkremenetelig tartó kúszás eredményeiből mállapítottuk, hogy az MWCNT kedvező mechanikai tulajdonságainak, valamint a merevségre kifejtett hatása miatt kompozitok, valamint azok reciklátumainak kúszási hajlama jelentősen csökkent.
References
[1] Yashas GT Girijappa; Vinod Ayyappan;Madhu Puttegowda;Sanjay M Rangappa; Jyotishkumar Parameswaranpillai; and Suchart Siengchin, “Plastics in Automotive Applications,” Amsterdam: Elsevier , 2020.
[2] S. A. Pradeep, R. K. Iyer, H. Kazan, and S. Pilla, “Automotive Applications of Plastics: Past, Present, and Future,” in Applied Plastics Engineering Handbook, Elsevier, 2017, pp. 651–673. doi: 10.1016/B978-0-323-39040-8.00031-6.
[3] A. Patti, R. Barretta, F. Marotti de Sciarra, G. Mensitieri, C. Menna, and P. Russo, “Flexural properties of multi-wall carbon nanotube/polypropylene composites: Experimental investigation and nonlocal modeling,” Compos Struct, vol. 131, pp. 282–289, Nov. 2015, doi: 10.1016/j.compstruct.2015.05.002.
[4] H. M. Zidan, E. M. Abdelrazek, A. M. Abdelghany, and A. E. Tarabiah, “Characterization and some physical studies of PVA/PVP filled with MWCNTs,” Journal of Materials Research and Technology, vol. 8, no. 1, pp. 904–913, Jan. 2019, doi: 10.1016/j.jmrt.2018.04.023.
[5] S. Bansal, N. Kumar, and P. Jindal, “Effect of MWCNT Composition on the Hardness of PP/MWCNT Composites,” Mater Today Proc, vol. 4, no. 2, pp. 3867–3871, 2017, doi: 10.1016/j.matpr.2017.02.285.
[6] M. Kartel, Yu. Sementsov, S. Mahno, V. Trachevskiy, and W. Bo, “Polymer Composites Filled with Multiwall Carbon Nanotubes,” Universal Journal of Materials Science, vol. 4, no. 2, pp. 23–31, Mar. 2016, doi: 10.13189/ujms.2016.040202.
[7] Y. Zou, Y. Feng, L. Wang, and X. Liu, “Processing and properties of MWNT/HDPE composites,” Carbon N Y, vol. 42, no. 2, pp. 271–277, 2004, doi: 10.1016/j.carbon.2003.10.028.
[8] T. Ogasawara, Y. Ishida, T. Ishikawa, and R. Yokota, “Characterization of multi-walled carbon nanotube/phenylethynyl terminated polyimide composites,” Compos Part A Appl Sci Manuf, vol. 35, no. 1, pp. 67–74, Jan. 2004, doi: 10.1016/j.compositesa.2003.09.003.
[9] M.-K. Seo and S.-J. Park, “Electrical resistivity and rheological behaviors of carbon nanotubes-filled polypropylene composites,” Chem Phys Lett, vol. 395, no. 1–3, pp. 44–48, Sep. 2004, doi: 10.1016/j.cplett.2004.07.047.
[10] F. Thiébaud and J. C. Gelin, “Multiwalled carbon nanotube/polypropylene composites : investigation of the melt processing by injection molding and analysis of the resulting mechanical behaviour,” International Journal of Material Forming, vol. 2, no. S1, pp. 149–152, Aug. 2009, doi: 10.1007/s12289-009-0474-0.
[11] D. Bikiaris, “Microstructure and Properties of Polypropylene/Carbon Nanotube Nanocomposites,” Materials, vol. 3, no. 4, pp. 2884–2946, Apr. 2010, doi: 10.3390/ma3042884.
[12] K. Prashantha, J. Soulestin, M. F. Lacrampe, P. Krawczak, G. Dupin, and M. Claes, “Masterbatch-based multi-walled carbon nanotube filled polypropylene nanocomposites: Assessment of rheological and mechanical properties,” Compos Sci Technol, vol. 69, no. 11–12, pp. 1756–1763, Sep. 2009, doi: 10.1016/j.compscitech.2008.10.005.
[13] S. H. Yetgin, “Effect of multi walled carbon nanotube on mechanical, thermal and rheological properties of polypropylene,” Journal of Materials Research and Technology, vol. 8, no. 5, pp. 4725–4735, Sep. 2019, doi: 10.1016/j.jmrt.2019.08.018.
[14] J. Yang, Z. Zhang, K. Friedrich, and A. K. Schlarb, “Creep resistant polymer nanocomposites reinforced with multiwalled carbon nanotubes,” Macromol Rapid Commun, vol. 28, no. 8, 2007, doi: 10.1002/marc.200600866.
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