Abstract
The article presents the influence of accelerated UV ageing on the structural properties of selected polymer materials. In this study, 3 types of materials from a group of thermoplastics known as PP30T, PE, POM were used. The test samples were prepared by injection moulding. In turn, an accelerated UV ageing process (600 h) was carried out in the UV Test chamber with fluorescent lamps characterized by a wavelength of 313 nm. Changes in the structure of the tested materials were observed by using an optical microscope. Measurements of gloss on the surface of primary samples that were exposed to UV rays were also taken. In addition, the structure of primary and aged samples was tested by differential scanning calorimetry (DSC). The conducted studies have demonstrated the impact of UV radiation on the changes in the surface layer of tested materials.
Highlights
Polymer materials are very widely used in the manufacturing of products in all industrial sectors
Observation of the surface of samples subjected to UV ageing shows that it has a negative impact on the surface layers of the tested materials and that these processes occur in these materials with different dynamics
In the case of samples from semi-crystalline materials, significant changes can be observed on the surface of the tested specimens that are already visible to the naked eye
Summary
Polymer materials are very widely used in the manufacturing of products in all industrial sectors. The disadvantages of using polymer materials include, among others, changes in their properties under the influence of physical and chemical factors occurring in the conditions in which they are used. These include i.a.: temperature of use, chemical agents and light radiation, UV. An important element which enhances the physical and chemical agents’ effect is the simultaneous deformation of the products of plastics during their use [2]. They significantly affect the degradation processes of polymers [3 ÷ 11]
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