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Nedjma S.,Laboratoire des Materiaux Polymeres Avances LMPA | Djidjelli H.,Laboratoire des Materiaux Polymeres Avances LMPA | Boukerrou A.,Laboratoire des Materiaux Polymeres Avances LMPA | Grohens Y.,University of Southern Brittany | And 3 more authors.
Journal of Vinyl and Additive Technology | Year: 2014

Natural fibers used as reinforcement in composite materials present specific mechanical properties, which are comparable to glass fibers. In addition, they have the advantage of being renewable and recyclable. However, their main drawback is their inherent susceptibility to moisture expansion, which has the effect of inducing a decrease in mechanical properties, and of debonding in the composite. In this study, lignocellulosic fibers from newspapers were modified with acetic anhydride, NaOH, and KMnO4 in order to enhance the interfacial adhesion between polyvinylchloride (PVC) matrix and the newspaper fibers. Composites samples were prepared with different treated fibers at the same loading (20 wt%). X-ray and scanning electron microscopy (SEM) were used to characterize the fiber's surfaces. The mechanical, morphological, and thermal properties of PVC/newspaper composites were also studied. Moreover, the maximum improvement in the mechanical properties (tensile strength) was obtained for the permanganate treated PVC/newspaper composites. © 2014 Society of Plastics Engineers. Source


Bellili N.,Laboratoire des Materiaux Polymeres Avances LMPA | Djidjelli H.,Laboratoire des Materiaux Polymeres Avances LMPA | Boukerrou A.,Laboratoire des Materiaux Polymeres Avances LMPA | Barres C.,Laboratoire Des Materiaux Macromoleculaires Of Linsa Of Lyon20 Avenue Albert Einstein69621Villeurbanne Lyon France | Fenouillot F.,Laboratoire Des Materiaux Macromoleculaires Of Linsa Of Lyon20 Avenue Albert Einstein69621Villeurbanne Lyon France
Journal of Vinyl and Additive Technology | Year: 2014

In this study, gamma irradiation treatments were used to improve the compatibility between polyvinylchloride (PVC) and olive residue flour (ORF). The blends were subjected to gamma irradiation at doses of 10 and 70 kGy. The mechanical, thermal, and morphological behaviors of those blends have been assessed. The irradiated blends exhibit better thermal properties, higher tensile modulus, elongation, and strength at break than those of unirradiated blends. The contact angle of water on the surface of a blend irradiated at doses of 10 and 70 kGy is smaller than that for their corresponding unirradiated blend. These treatments cause surface oxidation of PVC/ORF films, as revealed by Fourier transform infrared (FTIR) spectroscopy analysis. © 2014 Society of Plastics Engineers. Source

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