Effect of Radiation with Wavelength of 313 nm on Changes in Physical Properties and Structure of Polymers |
| A. Kalwik, K. Mordal, J. Redutko
Department of Technology and Automation, Faculty of Mechanical Engineering and Computer Science, Częstochowa University of Technology, al. Armii Krajowej 19c, 42-200 Częstochowa, Poland |
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| The aim of this work is to examine the thermomechanical and structural properties of thermoplastic materials. Standardised test samples were subjected to the ageing process under accelerated conditions with a lamp length of 313 nm and an irradiation level of 0.76 W/m2. On the basis of the literature data, the radiation dose necessary to obtain the value of energy reaching the earth surface in the European zone corresponding to a period of 2 years under natural conditions was determined. The research included the determination of the quantitative crystalline phase index, temperatures of phase transformations using the differential scanning calorimetry method and thermomechanical analysis at dynamically changing loads. The variability of physicomechanical characteristics of the tested samples in the range of storage modulus and tangent of mechanical loss angle as a function of temperature was determined. |
DOI:10.12693/APhysPolA.139.565 topics: polymeric materials, UV ageing, thermomechanical properties |