Papers by barbara calderon
This works regards the diffusion of power beyond the State concerning the Deep Web, the undergrou... more This works regards the diffusion of power beyond the State concerning the Deep Web, the undergrounds of the digital web. To do so, the concept of power according to Susan Strange was used. The cases that gained most international repercussion, and whose origins is the Deep Web, were discussed such as the Wikileaks, the group Anonymous, Silk Road, the islamic jihadist terrorism. It was our intention to analyze, according to theory, the results of the actions of these agents in the real geographic dimension e its consequences.
Post-pandemic Urbanism, 2021
Die Stadt nach Corona, 2021
Educacion Para El Desarrollo Y Cooperacion Internacional 2001 Isbn 84 7491 627 5 Pags 237 244, 2001
Macromolecular Symposia, 2001
To improve the mechanical properties of granular corn starch-filled poly(e-caprolactone) (PCL) co... more To improve the mechanical properties of granular corn starch-filled poly(e-caprolactone) (PCL) compositions, three strategies were investigated including the hydrophobic coating of starch granules by reaction with n-butyl isocyanate, the addition of PCL-grafted dextran (PGD) as an amphiphilic compatibilizer, and the use of PCL-grafted granular starch (PGS). Except for the chemical modification of granular starch by reaction with n-butyl isocyanate, the synthesis of both PGD and PGS relies upon the controlled ring-opening polymerization (ROP) of e-caprolactone (CL) initiated by Al-alkoxides generated onto the polysaccharide, either dextran or starch particles. While the hydrophobic coating of starch only provides higher tensile strength and elongation at break, these properties as well as Young's modulus and strength at yield of the PCL/starch blends were remarkably increased by locating the PCL-grafted dextran at the filler/matrix interface. It is however worth pointing out that a tougher and stiffer material was obtained by melt blending PGS and pure PCL. These property changes were analyzed and clearly related to parameters such as filler dispersion, interfacial tension, interfacial adhesion and reinforcement by PCL crystallites.
Uploads
Papers by barbara calderon