The role of the IMF and the World Bank in the former Eastern Bloc countries
Although the main responsibility for carrying out economic reforms in the countries of Central and Eastern Europe lies with these countries themselves, the transformation of the Soviet-style economic system into a market economy must be made easier by support from abroad. In this the International Monetary Fund and the World Bank will play an important part.
The EBRD: Redundant, or an important actor in the transformation of Eastern Europe?
Now in its second year of operation, the European Bank for Reconstruction and Development was the first new institution set up by the West to cope with the historical challenge of helping to transform the centrally planned economies of Eastern Europe into market economies. Strongly criticized for its lack of funds and its redundant profile when compared to the World Bank and the European Investment Bank, the “European Bank” is still struggling to assume an independent role in the transformation process and remains a controversial institution.
EFFECT OF SAMPLE PREPARATION ON WATER TREE RESISTANCE OF XLPE/SEBS BLENDS
The effects of an aromatic polymer, such as poly[styrene-b-(ethylene-co-butylene)b-styrene] (SEBS), and its preparation processes on water tree resistance, morphology, crystallinity, dielectric constant and dielectric loss tangent of crosslinked polyethylene (XLPE)/SEBS and XLPE/SEBS/ethylene vinyl acetate (EVA) blends were investigated. The XLPE/SEBS samples were characterized by means of differential scanning calorimetry, scanning electron microscopy, dielectric spectral analysis and the accelerated water treeing experiment. The results clearly showed that although SEBS was partially compatible with LDPE and it was dispersed evenly in XLPE matrix, the blends demonstrated excellent dielectric performances, such as dielectric constant and dissipation factor. The crystallinity of XLPE/SEBS blends was decreased with increase in SEBS content and it was further decreased with the addition of EVA. SEBS could effectively improve the water-tree resistance of XLPE and both SEBS and EVA were found to improve the water tree resistance of XLPE synergistically as expected. The differences in sample preparation processes could change the phase morphology and dielectric performance of the blends, and could also influence the dispersion of SEBS in XLPE matrix as well as the crystallinity of the blends. Different preparation processes led to different water tree resistance behaviours of the samples. The improvement of SEBS dispersion in XLPE matrix helped to improve the water tree resistance of XLPE.