Low-velocity impacts can severely jeopardize the structural reliability of polymer composites. In view of this, the present work provides a thorough overview of the impact response of polypropylene (PP) composites reinforced with an ecofriendly intraply flax/basalt hybrid fabric, assessing the effect of different parameters: energy level, temperature, and number of impacts. Indeed, high-energy single impacts are as dangerous as low-energy repeated impacts for the structural integrity of laminates. Moreover, considering the poor interfacial adhesion between hydrophobic polyolefin matrices and hydrophilic vegetable fibers, the effect of a maleic anhydride coupling agent was evaluated. A detrimental effect of coupling agent on composites impact response was observed, determining a reduction of the impact life (impacts to failure from 83 to 63 at 10 J and from 30 to 9 at 15 J) because several energy dissipation mechanisms were prevented. Decreasing temperatures (−40°C) caused an embrittlement effect on neat PP composites with an increase between 7.3% and 20.3% of maximum force and a decrease between 7.5% and 10.9% of maximum displacement, whereas increasing temperatures (80°C) led to a softening of compatibilized composites with a decrease between 13.8% and 27.5% of maximum force and an increase between 28.1% and 34.4% of maximum displacement.

Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites / Ferrante, L.; Sergi, C.; Tirillo', J.; Russo, P.; Calzolari, A.; Sarasini, F.. - In: POLYMER COMPOSITES. - ISSN 0272-8397. - 42:9(2021), pp. 4397-4411. [10.1002/pc.26157]

Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites

Sergi C.
;
Tirillo' J.;Sarasini F.
2021

Abstract

Low-velocity impacts can severely jeopardize the structural reliability of polymer composites. In view of this, the present work provides a thorough overview of the impact response of polypropylene (PP) composites reinforced with an ecofriendly intraply flax/basalt hybrid fabric, assessing the effect of different parameters: energy level, temperature, and number of impacts. Indeed, high-energy single impacts are as dangerous as low-energy repeated impacts for the structural integrity of laminates. Moreover, considering the poor interfacial adhesion between hydrophobic polyolefin matrices and hydrophilic vegetable fibers, the effect of a maleic anhydride coupling agent was evaluated. A detrimental effect of coupling agent on composites impact response was observed, determining a reduction of the impact life (impacts to failure from 83 to 63 at 10 J and from 30 to 9 at 15 J) because several energy dissipation mechanisms were prevented. Decreasing temperatures (−40°C) caused an embrittlement effect on neat PP composites with an increase between 7.3% and 20.3% of maximum force and a decrease between 7.5% and 10.9% of maximum displacement, whereas increasing temperatures (80°C) led to a softening of compatibilized composites with a decrease between 13.8% and 27.5% of maximum force and an increase between 28.1% and 34.4% of maximum displacement.
2021
basalt; bio-based composite; coupling agent; flax; low-velocity impact; multiple impacts; temperature
01 Pubblicazione su rivista::01a Articolo in rivista
Temperature effect on the single and repeated impact responses of intraply flax/basalt hybrid polypropylene composites / Ferrante, L.; Sergi, C.; Tirillo', J.; Russo, P.; Calzolari, A.; Sarasini, F.. - In: POLYMER COMPOSITES. - ISSN 0272-8397. - 42:9(2021), pp. 4397-4411. [10.1002/pc.26157]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1569244
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