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Volume 3, Issue 2 (Summer 2019)
Abstract
In order to develop the scope of application of polymer materials in the preparation of drilling fluids, in this study, various blends of wheat starch and copolymer of sulfonated polyacrylamide were prepared and the rheology and compatibility behavior of samples under different salinity and aging conditions were evaluated. The rheological behavior of starch-polyacrylamide blends in tap water and saturated brine water showed that the viscosity of the samples increased with increasing concentration of polyacrylamide copolymer in the both media. However, starch-polyacrylamide blends in saturated brine had less viscosity than tap water. It was observed that in both tap water and salt water saturated conditions after 4 hours of aging at 90 ° C, the viscosity of most samples increased. Comparison of the curves for empirical viscosity data and prediction of the mixing rule showed that in both of tap water and salt saturated water, positive deviation from the mixing rule is observed, which indicates the compatibility between the blend components. By performing the aging process, although positive deviation was still observed, this positive deviation slightly decreased, which means the negative effect of aging on the compatibility of the starch- copolymer of sulfonated polyacrylamide blend.
In conclusion, the results of this study showed that the blend of starch- sulfonated polyacrylamide copolymer is compatible at high temperature (90 °C) and saturated NaCl salt wate. Moreover, in some samples, this compatibility exists even after aging.
Ali Akbar Mohammadi, Samira Ostovari,
Volume 12, Issue 3 (12-2024)
Abstract
Studying the mutual relationship between literature and cinema and the emergence of the characteristics of each of these two arts in the other has been the focus of interest of many researchers in these two categories. Examining the cinematic potential of literary works has been the focus of scholars for nearly a decade. Authors of literary works, by knowing cinematic elements and using them in their works, make their works dynamic, and filmmakers, by adapting these successful literary works, find enduring themes and present them to their audiences. Most film adaptations are based on novels. Youssef Zidane is one of the authors whose visual abilities are evident in his novels dedicated to cinema. In this research, an attempt was made to analyze the text of the story of the sheikh in prison using the descriptive analytical approach and the comprehensive approach. Our goal in this research is to analyze the structure and content of the aforementioned novel and show aspects of its quotation from different angles. The results of the aforementioned research indicate that this novel has great potential for cinematic adaptation and screenwriting due to its cinematic structure, its accuracy in describing details, its directing and dramatic dialogues, and its ability to be serialized.