Effects of the biodegradation on biodegradable polymer blends and polypropylene

The large use of plastics in the world generates a large amount of waste which persists around 200 years in the environment. To minimize this effect is important to search some new polymer materials: the blends of biodegradable polymers with synthetic polymers. It is a large area that needs an Intensive research to investigate the blends properties and its behavior face to the different treatments to aim at the blodegradation. The blends used In this work are: some blodegradable polymers such as: poly(hydroxybutyrate) (PHB) and poly(s-polycaprolactone) (PCL) with a synthetic polymer, polypropylene (PP), in lower concentration. These blends were prepared using an internal mixer (Torque Rheometer), and pressed. These films were submitted to fungus biotreatment. The films analyses will be carried out by Fourier Transform Infrared (FTIR), UV-Vis absorption (UV-Vis), Scanning Electronic Microscopy (SEM), DSC and TGA. © 2008 American Institute of Physics.

Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Chile

Includes bibliography

Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Colombia

Includes bibliography

Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Peru

Includes bibliography

Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Brazil

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Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Argentina

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Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: El Salvador

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Information and communication technology (ICT) for development of small and medium-sized exporters in Latin America: Mexico

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: Japan

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: China

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: Singapore

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: Republic of Korea

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: Thailand

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Information and communication technology (ICT) for development of small and medium-sized exporters in East Asia: Viet Nam

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Integrating open source codes for solid modeling and automatic mesh generation in FEM applications

The applications of the Finite Element Method (FEM) for three-dimensional domains are already well documented in the framework of Computational Electromagnetics. However, despite the power and reliability of this technique for solving partial differential equations, there are only a few examples of open source codes available and dedicated to the solid modeling and automatic constrained tetrahedralization, which are the most time consuming steps in a typical three-dimensional FEM simulation. Besides, these open source codes are usually developed separately by distinct software teams, and even under conflicting specifications. In this paper, we describe an experiment of open source code integration for solid modeling and automatic mesh generation. The integration strategy and techniques are discussed, and examples and performance results are given, specially for complicated and irregular volumes which are not simply connected. © 2011 IEEE.