This study deals with the development and optimization of hybrid composites integrating microcrystalline cellulose and short basalt fibers in a polypropylene (PP) matrix to maximize the mechanical properties of resulting composites. To this aim, the effects of two different coupling agents, endowed with maleic anhydride (MA-g(grafted)-PP) and acrylic acid (AA-g-PP) functionalities, on the composite properties were investigated as a function of their amount. Tensile, flexural, impact and heat deflection temperature tests highlighted the lower reactivity and effectiveness of AA-g-PP, regardless of reinforcement type. Hybrid formulations with basalt/cellulose (15/15) and with 5 wt. % of MA-g-PP displayed remarkable increases in tensile strength and modulus, flexural strength and modulus, and notched Charpy impact strength, of 45% and 284%, 97% and 263%, and 13%, in comparison with neat PP, respectively. At the same time, the thermo-mechanical stability was enhanced by 65% compared to neat PP. The results of this study, if compared with the ones available in the literature, reveal the ability of such a combination of reinforcements to provide materials suitable for automotive applications with environmental benefits.

Hybrid cellulose–Basalt polypropylene composites with enhanced compatibility. The role of coupling agent / Sergi, C.; Sbardella, F.; Lilli, M.; Tirillo', J.; Calzolari, A.; Sarasini, F.. - In: MOLECULES. - ISSN 1420-3049. - 25:19(2020). [10.3390/molecules25194384]

Hybrid cellulose–Basalt polypropylene composites with enhanced compatibility. The role of coupling agent

Sergi C.;Sbardella F.;Lilli M.;Tirillo' J.
;
Sarasini F.
2020

Abstract

This study deals with the development and optimization of hybrid composites integrating microcrystalline cellulose and short basalt fibers in a polypropylene (PP) matrix to maximize the mechanical properties of resulting composites. To this aim, the effects of two different coupling agents, endowed with maleic anhydride (MA-g(grafted)-PP) and acrylic acid (AA-g-PP) functionalities, on the composite properties were investigated as a function of their amount. Tensile, flexural, impact and heat deflection temperature tests highlighted the lower reactivity and effectiveness of AA-g-PP, regardless of reinforcement type. Hybrid formulations with basalt/cellulose (15/15) and with 5 wt. % of MA-g-PP displayed remarkable increases in tensile strength and modulus, flexural strength and modulus, and notched Charpy impact strength, of 45% and 284%, 97% and 263%, and 13%, in comparison with neat PP, respectively. At the same time, the thermo-mechanical stability was enhanced by 65% compared to neat PP. The results of this study, if compared with the ones available in the literature, reveal the ability of such a combination of reinforcements to provide materials suitable for automotive applications with environmental benefits.
basalt fibers; hybrid; interface; mechanical properties; microcrystalline cellulose; polymer-matrix composites; polypropylene
01 Pubblicazione su rivista::01a Articolo in rivista
Hybrid cellulose–Basalt polypropylene composites with enhanced compatibility. The role of coupling agent / Sergi, C.; Sbardella, F.; Lilli, M.; Tirillo', J.; Calzolari, A.; Sarasini, F.. - In: MOLECULES. - ISSN 1420-3049. - 25:19(2020). [10.3390/molecules25194384]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1443913
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