Study of the Compatibilization Effect of Different Reactive Agents in PHB/Natural Fiber-Based Composites
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Study of the Compatibilization Effect of Different Reactive Agents in PHB/Natural Fiber-Based CompositesAutoria
Data de publicació
2020Editor
MDPIISSN
2073-4360Cita bibliogràfica
Sánchez-Safont, E.L.; Aldureid, A.; Lagarón, J.M.; Cabedo, L.; Gámez-Pérez, J. Study of the Compatibilization Effect of Different Reactive Agents in PHB/Natural Fiber-Based Composites. Polymers 2020, 12, 1967.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.mdpi.com/2073-4360/12/9/1967Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Fiber–matrix interfacial adhesion is one of the key factors governing the final properties of
natural fiber-based polymer composites. In this work, four extrusion reactive agents were tested as
potential compatibi ... [+]
Fiber–matrix interfacial adhesion is one of the key factors governing the final properties of
natural fiber-based polymer composites. In this work, four extrusion reactive agents were tested as
potential compatibilizers in polyhydroxylbutyrate (PHB)/cellulose composites: dicumyl peroxide
(DCP), hexamethylene diisocyanate (HMDI), resorcinol diglycidyl ether (RDGE), and triglycidyl
isocyanurate (TGIC). The influence of the fibers and the different reactive agents on the
mechanical properties, physical aging, and crystallization behavior were assessed. To evaluate
the compatibilization effectiveness of each reactive agent, highly purified commercial cellulose fibers
(TC90) were used as reference filler. Then, the influence of fiber purity on the compatibilization
effect of the reactive agent HMDI was evaluated using untreated (U_RH) and chemically purified
(T_RH) rice husk fibers, comparing the results with the ones using TC90 fibers. The results show that
reactive agents interact with the polymer matrix at different levels, but all compositions showed a
drastic embrittlement due to the aging of PHB. No clear compatibilization effect was found using
DCP, RDGE, or TGIC reactive agents. On the other hand, the fiber–polymer interfacial adhesion was
enhanced with HMDI. The purity of the fiber played an important role in the effectiveness of HMDI
as a compatibilizer, since composites with highly purified fibers showed the greatest improvements
in tensile strength and the most favorable morphology. None of the reactive agents negatively
affected the compostability of PHB. Finally, thermoformed trays with good mold reproducibility were
successfully obtained for PHB/T_RH/HMDI composition. [-]
Publicat a
Polymers 2020, 12, 1967.Proyecto de investigación
RTI2018-097249-B-C22, UJI-B2019-44, H2020 EU Project YPACK (H2020-SFS-2017-1, Reference 773872)Drets d'accés
info:eu-repo/semantics/openAccess
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