Blends of recycled polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS) were prepared and some mechanical and morphological properties were investigated. To compatibilize these blends, ABS-g-(maleic anhydride) (ABS-g-MA) and (ethylene-vinyl acetate)-g-(maleic anhydride) (EVA-g-MA) with similar degree of grafting of 1.5% were used. To compare the effect of the type of compatibilizer on mechanical properties, blends were prepared using 3, 5 and 10 phr of each compatibilizer. A co-rotating twin-screw extruder was used for blending. The results showed that ABS-g-MA had no significant effect on the tensile strength of the blends while EVA-g-MA decreased the tensile strength, the maximum decrease being about 9.6% when using 10 phr of this compatibilizer. The results of notched Charpy impact strength tests showed that EVA-g-MA increased the impact strength of blends more than ABS-g-MA. The maximum value of this increase occurred when using 5 phr of each compatibilizer, it being about 54% for ABS-g-MA and 165% for EVA-g-MA. Scanning electron microscopy micrographs showed that the particle size of the dispersed phase was decreased in the continuous phase of PC by using the compatibilizers. Moreover, a blend without compatibilizer showed brittle behaviour while the blends containing compatibilizer showed ductile behaviour in fracture.
In this research, the effect of nano zinc oxide (ZnO) and conventional ZnO on cross-linking densities of natural rubber (NR)/butadiene rubber (BR) and NR/styrenebutadiene rubber (SBR) blends was investigated. The cross-linking densities of blends were determined using swelling behavior technique. Blends of NR/BR and NR/SBR with various concentrations ranging from 0.5 to 5 parts per 100 g of rubber (phr) of nano ZnO and ZnO were prepared. A sheet of each compound was prepared using compression molding method and tests were carried out. The results indicated that the incorporation of nano ZnO instead of conventional rubber grade ZnO resulted in increasing the crosslinking density. The swelling test results show that the compounds containing nano ZnO absorb less solvent, since they had greater cross-link density in comparison with compounds that had conventional ZnO. Nano ZnO provides a more effective surface for the formation of accelerator-sulfur-ZnO complex. As a result, interfacial interaction increased and particles dispersed efficiently into the matrix of the polymer. The swelling ratios of NR/BR blends were increased, while the swelling ratios of NR/SBR blends were decreased by increasing the amount of nano ZnO from 3 to 5 phr.
In this study, the effect of nanoclay and carbon black on the curing system of styrene-butadiene rubber (SBR)/butadiene rubber (BR) and natural rubber (NR)/BR blends were investigated. The dispersion of nanoclay and carbon black in blends was studied under the x-ray diffraction and scanning electron microscopy. Intercalated microstructure of SBR/BR blends is more stable than NR/BR blends. The presence of carbon black did not affect the dispersion state of nanoclay in NR/BR nanocomposites. By increasing the amount of nanoclay from 0 to 9 phr, the scorch time, optimum cure time, and difference between maximum and minimum torque were reduced in both the blends.
In this article, polyamide 6 (PA6)/clay nanocomposites, PA6/polyethylene grafted maleic anhydride (PE-g-MA) blends, and PA6/PE-g-MA/clay nanocomposites were prepared and their gasoline permeation behavior and some mechanical properties were investigated. In PA6/clay nanocomposites, cloisite 30B was used as nanoparticles, with weight percentages of 1, 3, and 5. The blends of PA6/PE-g-MA were prepared with PE-g-MA weight percents of 10, 20, and 30. All samples were prepared via melt mixing technique using a twin screw extruder. The results showed that the lowest gasoline permeation occurred when using 3 wt % of nanoclay in PA6/clay nanocomposites, and 10 wt % of PE-g-MA in PA6/PE-g-MA blends. Therefore, a sample of PA6/PE-g-MA/clay nanocomposite containing 3 wt % of nanoclay and 10 wt % of PE-g-MA was prepared and its gasoline permeation behavior was investigated. The results showed that the permeation amount of PA6/PE-g-MA/nanoclay was 0.41 g m 22 day 21 , while this value was 0.46 g m 22 day 21 for both of PA6/3wt % clay nanocomposite and PA6/10 wt % PE-g-MA blend. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40150.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.