Nowadays polymers are, because of their versatility used and/or processed in numerous industries. With knowing polymer properties and its behaviour during processing and studying effect of processing parameters on the properties of polymer product, we can obtain very useful properties for different products. In my dissertation I presented correlations between rheological properties and molecular weight of polymer melts and solutions. Molecular weight is one of the most important properties of polymers, as many physical properties are influended by it (viscosity, chemical resistance, christallinity...). Higher molecular weight results in better physical properties which we tend to attain and that is why they represent advantages over traditional materials. While knowing rheological properties of polymers is crucial for their successful processing, we can also acquire informations about their molecular weight or changes between indentical polymer materials.
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