Synthesis of Poly(Methyl Methacrylate) Reinforced by Graphene Nanoplates

Graphene nanoplatelets (GNPs) was used as a nanofiller in Poly(methyl methacrylate) (PMMA) synthesized by the Atom Transfer Radical Polymerization (ATRP) method. The first step in the synthesis of the PMMA/GNPs was the dispersion of GNPs in the PMMA liquid monomers by combining the solutions so that GNPs had superior mechanical properties, thermal stability, and electrical conductivity also lower density of mass. Then the crosslinked PMMA/GNPs nanocomposite samples were synthesized by using the in-situ polymerization method. However, there was a challenging technical problem in the application of GNPs (at a large amount) in the polymer. For the purpose of benefiting from the advantageous properties of GNPs (especially in bulk quantities) at PMMA, the major problem at the synthesis of PMMA/GNPs nanocomposite was the GNPs dispersion in the polymer matrix. This research has focused on solving that dispersion problem with the aim of enhancing the mechanical properties of the nanocomposite by utilizing the ATRP method as the effective production technic. The structural characterization of PMMA/GNPs nanocomposite was performed for the examination of the integration of GNPs in PMMA. The surface morphology of the nanocomposite was analyzed using SEM images. X-Ray Diffraction (XRD) as a non-destructive test method was used to examine the changes in the crystalline properties of the nanocomposite structure with the rise of the GNPs amount in PMMA. The bonding interactions with each other were investigated by using Raman analysis.

Dynamic Strategic and Organizational Capabilities

In the reviewed literature, dispersion was identified in the concepts used in the definition of dynamic capacities (CD), incomplete theories were also observed on which the proposed concepts were based, which has hindered the development of theoretical knowledge and the conduct of research empirical. The effort of the authors to solve this problem has been partial since it was analyzed from the perspective of strategy theory, the theory of organizations and administration (TOA) was not considered, this situation affected the clarity and precision of the CD. The objective was raised, to build the concept of dynamic strategic and organizational capacities (CDEO) based on the theories of strategy (TE), organizations (TO) and administration (TA), in order to modernize the traditional concept dynamic capabilities (CD) and provide a solution to the concept dispersion problem. Originality. Integration of theories around the CDEO construct, which will allow the theoretical and empirical development.