| Autor: |
Taher, Fatemeh, Afshari, Mahmoud, Houmani, Ali, Samadi, Mohammad Reza, Bakhshi, Soroush, Afshari, Hossein |
| Předmět: |
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| Zdroj: |
Colloid & Polymer Science; Mar2024, Vol. 302 Issue 3, p393-407, 15p |
| Abstrakt: |
The aim of this work is to enhance the impact strength and tensile modulus of the PP/EPDM/TiO2 nanocomposite fabricated by fused filament fabrication. Hence, the response surface methodology and desirability function procedure were applied to find the optimum values of TiO2 content, nozzle temperature and printing speed. Then, the microstructural features of the printed samples were investigated by SEM, TGA and DSC analyses. The results indicated that the greatest impact strength of samples (73 J/m) was attained at a TiO2 content of 4 wt%, while the tensile modulus of samples was maximized (1130 MPa) at a TiO2 content of 2 wt% due to good distribution of the nanoparticles. The increase of the nozzle temperature from 200 to 225 ºC resulted in an improvement in the impact strength (16.2%) and tensile modulus (11.1%) because of suitable viscosity of the filament, whereas the impact strength (11.2%) and tensile modulus (6.7%) were reduced with the increase of nozzle temperature from 225 to 250 ºC because of the thermal degradation of filament. Moreover, as the printing speed increased from 20 to 40 mm/s, the tensile modulus initially enhanced by 2.4% and then decreased by 1.2%, but the impact strength continuously decreased by 6.5%. Finally, the simultaneous enhancement of the impact strength and tensile modulus has been attained at a TiO2 content of 2.4 wt%, nozzle temperature of 226 ºC and printing speed of 28 mm/s. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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