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Abstract
Selected rheological properties of thermoplastic polymer materials before and after exposure in different environments were evaluated by Frequency sweep test, which monitors changes in viscoelastic properties of polymers with respect to their molecular structure and their behavior in thermoplastic processes. Samples of tested material were subjected in UV radiation, moist soil with higher concentration of chlorides and solution of n-hexane for exact period. Degradation process resulted in changes of complex dynamic viscosity, storage and loss modulus, changes in molar mass and its distribution.
Highlights
In the last few decades, polymers have been widely used materials in industry and their utilization in engineering applications is widely growing all over the world
These measurements were carried out only in exposed surface layers that were replaced from the exposed sample
There is evident difference in degradation seen from the surface further to the depth and the layer of 750 μm has significantly different viscoelastic properties – material becomes more fragile
Summary
In the last few decades, polymers have been widely used materials in industry and their utilization in engineering applications is widely growing all over the world. Their versatility makes them suitable for a whole range of applications, and comes from the capability of manufacturers to tailor microstructures and properties through control of the processing conditions [1]. Polymer materials represent an important area in which they are becoming predominant against other materials and have increased considerably and rapidly. Their relatively low cost, ease of installation, transportation, and long-term durability against environmental degradation (harmful environmental attack such as corrosion, rust and higher thermal stresses) make plastics an attractive alternative to metals. The aim of this study is the comparison of selected rheological properties of thermoplastic polymer materials before and after exposure in different environments with a degradation effect
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