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- W193132258 abstract "Fatty hydrazides (FH) which were synthesized from palm oil were used as one of theorganic compounds to modify a natural clay (sodium montmorillonite). The claymodification was carried out by stirring the clay particles in an aqueous solution of amixture of FH and octadecylammonium (ODA) by which the clay layer distanceincreases from 1.27 nm to 2.60 nm. The modified clay was then used in thepreparation of the natural rubber/polypropylene (NR/PP) blend nanocomposites. Theintercalation of the modifier in the clay layer was characterized by X-ray diffraction(XRD) and Fourier Transform Infrared (FT-IR). Elemental analysis was used toestimate the presence of FH and ODA in the clay.In the first part of the preparation, the nanocomposites were synthesized by meltmixing of the modified clay and a natural rubber (SMR CV60) using a two-roll-millinternal mixer. The compounded natural rubber was then mixed with organicperoxide-Luperox F-40P at 60 °C and cured at 130 °C using an electrical hydraulichot press. Mechanical properties of the produced composites were then characterized. The results indicate that the presence of the modified clay hasdramatically improved these properties. The crosslinked NR/clay nanocompositeswere further characterized by XRD, Transmission Electron Microscopy (TEM) andThermogravimetric Analysis (TGA).In the final part of the study, preparation of the nanocomposites was carried out bymelt mixing of the modified clay with NR/PP in the ratio of 50:50 using the internalmixer. The study of mixing temperature, rotor speed and mixing time shows thatunder the following mixing conditions: temperature of 170 °C, 75 rpm of rotor speedand 10 minutes of mixing time, the composites with maximum tensile strength andelongation at break were obtained. The modified clay content to give maximumtensile strength is 1 php. The crosslinking of NR/PP, using Luperox F-40P tocrosslink the rubber phase was also investigated. The compound was then cured in ahot press at 185 °C. The optimum concentration of Luperox F-40P to give maximumstrength and elongation at break is 2.0 php. The tensile strength of Luperox F-40Pcrosslinked NR/PP/clay is higher compared to those of the unfilled crosslinkedNR/PP/clay. The presence of 1 or 3 php of the modified clay into the Luperox F-40Pcrosslinked NR/PP increases its tensile strength. TGA study shows that crosslinkedNR/PP/clay nanocomposites have higher decomposition temperatures in comparisonwith those of the crosslinked NR/PP/clay composites." @default.
- W193132258 created "2016-06-24" @default.
- W193132258 creator A5028905411 @default.
- W193132258 date "2008-01-01" @default.
- W193132258 modified "2023-09-26" @default.
- W193132258 title "Preparation and Characterization of Natural Rubber/Polypropylene/Fatty Hyrazide-Octadecyl Ammonium Modified Clay Nanocomposites" @default.
- W193132258 hasPublicationYear "2008" @default.
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