GORIRAYA RESPECT!!
I want the garlic!!
I want the garlic!!
My research is composite material of a carbon fiber and plastic resins.
This is called carbon fiber reinforced plastics (CFRP). This is better than a metal because of its high specific strength and corrosiveness etc... Now, Carbon fiber reinforced thermoplastic plastics using thermoplastic resin (CFRTP) as a resin has attracted attention. My using thermoplastic resin is mainly a polypropylene because it is inexpensive, lightweight as a resin, excellent in formability, chemical resistance, etc. This can solve that current mainly CFRP using a thermosetting resin has problems such as high cost , productivity, and difficulty of materials cycle. CFRTP is possible to shorten the molding time and material recycling, and it is possible to improve the productivity. CFRTP using olefin resin such as PP is lower in strength than conventional CFRP and it is necessary to improve the interfacial adhesion between resin and carbon fiber (in other words interfacial shear strength) in order to have strength equal to or higher than that of conventional CFRP. And CFRTP has problem that it is low resin impregnation etc... In recent years, it has been reported that the interfacial shear strength improves by surface treatment of CF and modification of PP resin. However, it is unknown how the crystal of the resin affects the interfacial shear strength. Therefore, the effect of resin crystallinity on interfacial shear strength was investigated using crystal nucleating agent. (Experimental method) PP and maleic anhydride-modified PP (MAPP) as a polarity imparting agent, in order to change the crystal structure of PP, crystal nucleating agents (MD) were melt-kneaded respectively. The interfacial shear strength was evaluated by the microdroplet method. CF was attached to the jig, respectively, and the sample was fused and adhered in a nitrogen atmosphere, and then a drawing test was conducted. A PP film and a single CF were press molded and films were observed using a polarizing microscope in order to confirm how PP crystals can be formed near the interface between PP and CF. In PP / MD, PP spherulites of MD preferentially formed and interfacial shear strength decreased. In PP / MAPP / MD, although the miniaturization of PP crystal by MD was suppressed by MAPP, it was suggested that the trans - crystal became smaller and the interfacial shear strength improved.
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