In this study, sisal fiber (SF) was treated with graphene oxide (GO) by means of physical absorption method. Maleic anhydride grafted polypropylene (MAPP) was used to modify PP matrix. The GO‐SF/MAPP‐PP composites with different fiber loading were fabricated by using extrusion compounding and injection molding techniques. Scanning electron microscopy (SEM) micrographs of the fracture surface demonstrated that the interface adhesion between SF and PP matrix was enhanced by the combination treatment of GO and MAPP. X‐ray diffraction (XRD) results demonstrated that GO could play a role of β‐nucleating agent for PP crystallization. The combination treatment of GO and MAPP also displayed an effective enhancement on mechanical properties, melting temperature and water resistance of the GO‐SF/MAPP‐PP composite, which is an useful method to fabricate high performance natural fiber reinforced bio‐composites. POLYM. COMPOS., 39:E113–E121, 2018. © 2017 Society of Plastics Engineers

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In this paper, electronic-grade epoxidized Cardol (E-Cardol), a bifunctional reactive diluent for epoxy resin, was synthesized from Cardol and epichlorohydrin by a two-step reaction. FT-IR, NMR, and high-performance liquid chromatography have been used for structural characterization and reaction dynamic studies. A stepwise dichlorination process considering all sources of chloride has been proposed: (i) minimizing the etherification side reaction while accelerating the main reaction, (ii) driving the main etherification reaction forward in the closed-loop reaction, and (iii) applying a refining step based on the Williamson reaction. E-Cardol with a hydrolyzable chlorine content below 100 ppm and decreased viscosity (30%) was obtained. Copper corrosion experiments confirmed the enhanced anticorrosion properties of the electronic-grade E-Cardol coating. This constitutes the first report of an electronic-grade Cardol-based bifunctional reactive diluent. Our work may give a guide to the design of all of the electronic-grade bio-based reactive diluents and other epoxy resins.

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