We made the simulation program to simulate the phase separated structure of the polymer blend with spherical filler particles in a very short time based on the method by Laradji. In our programs, the motions of filler and the polymer phases are driven by the gradient of the free energy included the interaction between fillers and between filler and polymer phases. As a free energy of the phase separated structures, time dependent Ginzburg Landau free energy is used. Simulation was conducted in the two or three dimensional simulation boxes. Several trial simulations were done to check the availability of our simulation programs. In the early stage of our simulation, the spinodal ring structure can be observed which was already simulated by Lee et al. As times go on, the domain growth proceeded and the filler particles also moved along the domain growth. In our results, the bicontinuous and the droplet's structures can be obtained with changing the number of filler particles. These results are also observed by Araki et al. using fluid particle dynamics methods, and we confirm that we can also simulate the previously observed structures using our method. Furthermore we can simulate the phase separated structures in three dimensional systems, and we can also confirm the structures obtained by two dimensional simulations.

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To establish a technique for reproducible instrumental error variation on the plus side of diaphragm gas meters, diaphragms collected from the field were examined so as to determine the major cause of instrumental error variation on the plus side. The authors then carried out tests to reproduce instrumental error variation on the plus side, studying the conditions for a test of accelerated degradation equivalent to 20-year use. As a result, the authors found that the major cause of instrumental error variation on the plus side is diaphragm thermal degradation. The authors also confirmed that the accelerated heat aging conditions that replicate the state of a diaphragm after 20-years' use are 2000 hours at 70°C and 6000 hours at 60°C.

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In recent years, polymeric materials play important roles in industrial field, and high quality functional materials are used in many applications. Since organic polymeric materials are essentially flammable, consumption of flame retardant materials is increasing in accordance with these situations. In this coming five series of reviews, the recent technical situation of flame retardant polymeric materials are described. In this first review, the author would like to introduce the standards of flame retardant performance and enviromental safety regulations of flame retardant agents as the background of this technology.

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