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Evaluation of interactions between compatibilizers and photostabilizers in coir fiber reinforced polypropylene composites
Author(s) -
Staffa Lucas H.,
Agnelli José Augusto M.,
de Souza Miguel L.,
Bettini Sílvia H. P.
Publication year - 2017
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24495
Subject(s) - materials science , polypropylene , ultimate tensile strength , composite material , maleic anhydride , differential scanning calorimetry , plastics extrusion , scanning electron microscope , coir , izod impact strength test , polymer , copolymer , physics , thermodynamics
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