Evaluation of interactions between compatibilizers and photostabilizers in coir fiber reinforced polypropylene composites

Coir fiber‐reinforced polypropylene composites (PP/CF), compatibilized with maleic anhydride grafted polypropylene (PPMAH) and stabilized with a hindered amine, HALS (Tinuvin® 791) and UV absorber (Hostavin® ARO 8), were prepared in a co‐rotating twin‐screw extruder. The effects of additives and the...

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Bibliographic Details
Published in:Polymer engineering and science 2017-11, Vol.57 (11), p.1179-1185
Main Authors: Staffa, Lucas H., Agnelli, José Augusto M., de Souza, Miguel L., Bettini, Sílvia H. P.
Format: Article
Language:English
Subjects:
Absorbers
Additives
Amines
Anhydrides
Coir
Compatibility
Compatibilizers
Concentrators
Electron microscopy
Fiber composites
Fiber reinforced polymers
Maleic anhydride
Mechanical properties
Polymer matrix composites
Polymers
Polypropylene
Production processes
Tensile strength
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Summary:Coir fiber‐reinforced polypropylene composites (PP/CF), compatibilized with maleic anhydride grafted polypropylene (PPMAH) and stabilized with a hindered amine, HALS (Tinuvin® 791) and UV absorber (Hostavin® ARO 8), were prepared in a co‐rotating twin‐screw extruder. The effects of additives and their interactions were investigated by analyzing the mechanical properties, in tensile strength, scanning electron microscopy (SEM) and Differential Scanning Calorimetry (DSC). The results indicate that the incorporation of coir, in the presence of the compatibilizer, significantly increases tensile strength, but in the absence of the compatibilizer, the natural fibers act as stress concentrators, allowing a lower tensile strength to the sample. The joint presence of Tinuvin® and the compatibilizer has a negative effect on tensile strength and on the compatibility of the natural fiber with the matrix. UV absorber does not affect the compatibility of the PP/CF composites. POLYM. ENG. SCI., 57:1179–1185, 2017. © 2017 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.24495